SURFACE WATER TEMPERATURES
ALONG ATLANTIC AND GULF COASTS
OF THE UNITED STATES
Marine Biologir^ii (?i-!"''^fi iv
J IJ
WOODS HULL, MASS.
SPECIAL SCIENTIFIC REPORT-FISHERIES No. 214
UNITED STATES DEPARTMENT OF THE INTERIOR
FISH AND WILDLIFE SERVICE
EXPLANATORY NOTE
The series embodies results of investigations, usually of restricted
scope, intended to aid or direct management or utilization practices and as
guides for administrative or legislative action . It is issued in limited quantities
for official use of Federal, State or cooperating agencies and in processed form
for economy and to avoid delay in publication .
United States Department of the Interior, Fred A. Seaton, Secretary
U. S. Fish and Wildlife Service
SURFACE WATER TEMPERATURES ALONG ATLANTIC AND
GULF COASTS OF THE UNITED STATES
By
Dean F . Bumpus
Oceanographer
Woods Hole Oceanographic Institution
The preparation of this material has been carried out by the Woods
Hole Oceanographic Institution under Contract No. 14-19-008-2377
with the U. S. Fish and Wildlife Service
Contribution No . 904 from the Woods Hole Oceanographic Institution
Special Scientific Report- -Fisheries No. 214.
Washington, D.C.
April 1957
Table of Contents
Page
Introduction 1
Location of stations 3
Figure 1, Atlantic Coast Stations,
Eastport to Diamond Shoals 3
Figure 2, Atlantic Coast Stations,
Diamond Shoals to Key West k
Figure 3, Gulf Coast Stations 5
list of Stations 6
References H
Tables of Monthly and Annual Mean S\irface Water
Temperatures 12
Surface Water Temperatures along the Atlantic and Gulf
Coasts of the United States
Sea water temperatures have been collected daily at numerous
places along the eastern and southern seaboards of the United
States. Many of these records commenced during the latter part
of the nineteenth century and contuined on into the early part
of the twentieth century. Many others, unfortunately, were of
shorter duration. These records were collected at the instiga-
tion of the U. S, Commissioner of Fish and Fisheries (USCFF) by
the lighthouse and lightship keepers under the direction of the
U. S, Lighthouse Board and by members of the U, S, Signal Corps,
Rathbxm (188?) reported on many of these data for the period
1881-85. Parr (1933) also employed some of these data for the
peirLod 1928-31 in an examination of the seasonal changes in
temperature from a geographic-ecological point of view.
Latterly, the U. S, Coast and Geodetic Survey (USC&GS)
has made temperature observations in connection with their tide
stations and have published the monthly means (U, S. Department
of Commerce, 1955). The U, S, Weather Bureau (National Weather
Records Center) (NWRC) has kindly fvirnished recent data from
lightships taken four times daily.
Interest in the changes in the marine environment has
mounted recently due to the increasing awareness of the spread
of populations (Scattergood 1952) and the documented changes in
the environment (Collier, 19^; Ketchen, 1956; Taylor, Bigelow
and Graham, 1957).
As mentioned above, the historical records of surface water
temperature have been published only in part. There are pre-
sented herein the monthly and annual mean surface water temper-
atures for the period of record witii the exception of the USC&GS
data, in order to make these data available to investigating
biologists.
The original U. S. Commission of Fish and Fisheries (USCFF),
U, S, Bureau of Fisheries (USBF), U. S, Fish and Wildlife Service
(USFWS), daily data are on file at the Woods Hole Oceanographic
Institution, These data consist of daily or twice daily air and
water temperatures, wind and weather observations, together with
notes, in mainy instances, of fish observations. Such data are
mich too voluminous to publish ^n extenso. The data from a number
of stations along the Florida, Alabama, Mississippi, Louisiana and
Texas Coast have previously been presented in Whitehouse euid Brown
(1956), The origiaal data for these stations is on file with the
U, 3. Fish and Wildlife Service, Washington, D, C.
For reference purposes as to locations, periods of observation,
source and page herein, the following list of locations is given in
alphabetical order. The tables of data are arranged in geographical
order, so far as possible from North to South along the Itlantic
Coast and East to West along the Gulf Coast. The U3C&GS locations
are listed, but are not included in the tabulations. The locations
of these observations are indicated in Figs. 1, 2 and 3.
Most of the USC&GS stations are on a continuing basis and pre-
sumably the monthly means will be published from time to time. Two
additional USC&GS stations are also presently operating. Buzzards
Bay (Cape Cod Canal), Mass, and Sagamore (Cape Cod Canal), Mass,
Those lightships marked "ith an asterisk (*) are currently
collecting bath^-thermograms and surface water samples daily and
bottom water samples weekly. Buzzards Bay Lightship, Mass. is also
collecting daily surface water temperatures and surface water samples,
The data for the year 1956 will be published in extenso in a forth-
coming number of the Special Scientific Reports - Fisheries,
The patient assistance of Florence Glazer, C. Godfrey Day, Joan
Brigham and Nadine Atheam is gratefully acknowledged.
Note: If the reader is aware of other data which would mater-
ially add to this compendium, he is urged to make this information
known to the author. It could be included in forthcoming reports.
FIGURE I ATLANTIC COAST STATIONS . EASTPOHT TO DIAMOND SHOALS
NORTH CHARLESTON rAMuny
TERMINALS •«"5-a'
ASHLEY RIVER ^CHiSLESTON
.^ RATTLESNAKE SHOAL
CHARLESTON~BAB UGHT
Vol *MOND, SHOAL
MACON 4
LIGHTSHIP •
IFORT
CAPE LOOKOUT
CAPE LOOKOUT LIGHTSHIP
FRYING RAN SHOALS UGHTSHIP
♦ MARTINS INDUSTRY
FORT PULASKp m
5-^ 'SAVANNAH UGHTSHIP
> BRUNSWICK LIGHTSHIP
MAYPORT
JACKSONVILLE
FERNANDINA
ST JOHN LIGHTSHIP
DAYTONA BEACH
HAUFax RIVER
CANOVA BEACH
MIAMI BEACH
.•FOWEY ROCKS
• CARYSFORT REEF
v,v<k\-^' •
Q^V -^ SOMBRERO KEY
'^KEY WEST
80' 78-
FIGURE 2 ATLANTIC COAST STATIONS, DIAMOND SHOALS TO KEY WEST
List of Stations
Location
4bsecon Inlet, N. J,
Ambrose Lightship, N, Y,
Anclote Key, Fla.
Annapolis, Md,
Aransas Pass Light Station
(Harbor Island), Tex,
Asbury Park, N. J.
Atlantic City, N. J.
Baltimore, Md.
Bar Harbor, Me.
Bamegat Lightship, N. J,
Bartletts Reef, Conn,
Beaufort, N. C.
Block Island (Ctovt. HJharf), R. I.
•• " (S. E. Light), R, I.
Bodys Island, N, C,
Boon Island, Me,
Boothbay Harbor, Me,
Boston, Mass,
Boston Lightship, Mass,
Brazos-Santiago Light Station,
Port Isabel, Tex,
Breakwater Harbor, Del,'
H n ti
Brenton Reef Lightship, R. I,
Brunswick Lightship, Fla,
Bryans Point, Md,
Cainhoy, Wando River, S. C,
Cambridge, Md,
Canova Beach, Fla.
Cape Ann, Mass.
Cape Charles Lightship, Va,
Cape Charles (town), Va,
Cape Lookout Lighthouse, N. C,
" " Lightship, N. C,
Cape St. George Light Station,
Apalachlcola, Fla,
Carysfort Reef, Fla.
Cedar Keys, Fla,
It It H
Period
Source
1878-1896
US OFF
* 1937-1956
N'iffiC
I9O/V-I906
USBF
19A6-195^
USC&GS
1932-193-i
USBF
19A5-19A7
USC&GS
1881-1886
US OFF
1912-1954
USC&GS
1873-1387
U3CFF
19U-1954
USC&GS
19/^7-1954
USC&GS
* 1947-1955
NWRC
1878-1906
USCFF
1913-1932
USBF
1881-1886
USCFF
1878-1908
USCFF
1880-1883
USCFF
1878-1908
USCFF
1905-1955
USF'flS
1873-74
1881-90
USCFF
1922-1954
USC&GS
♦ 1925-19a
USBF
1930-1934
USBF
1919-1923
USC&GS
1947-1954
USC&GS
1878-1943
USCFF
1925-1928
USBF
1892-1902
USCFF
1951-1952
USC&GS
1945-1953
USC&GS
1946-1954
USC&GS
1878-1883
USCFF
1925-1928
USBF
1947-1952
USC&GS
1879-1900
USCFF
1925-1933
USBF
1930-1933
USBF
1878-1900
USCFF
1879-1890
USCFF
1922-26
1944-51, '54
. USC&GS
Page
64
61
127
152
'65
79
'63
52
97
56
55
92
25
19, 20
28
29
153
49, 50
113
82
26
76
94
95
130
120
128
Location
Chandeleur, La.
Charleston Ear, 3, C,
Charleston Lightship, S. C.
Charleston. S. C,
Charleston (Custom House Wharf), S. C.
Charleston, Ashley River, S. C,
Chesapeake Lightship, Va.
II II n
Chincoteague, Va,
Cross Rip Lightship, Mass.
Daytona Beach (Ocean), Fla.
" « (Halifax River), Fla.
Delaware Breakwater, Del.
Diamond Shoals Lightship, N. C.
n II It II
Dry Tortugas, Fla.
n II II
Period
.source
Eastport, Me.
Egmont Key, Fla.
Eugene Island, La.
Fernandina Beach, Fla.
Fire Island Lighthouse, N. Y.
" " Lightship, N. Y.
Five Fathom Bank Lightship, N. J,
n n H II ti
n H II H n
" " " (N. E. End Light), N.J.
Flagler Beach, Fla,
Fort Macon, K. C,
Fort Pulaski (Savannah River), Ga.
Fort Washington, Md.
Fourteen Foot Bank (Delaware Bay), Del,
Fowey Rocks, Fla.
Frying Pan Shoals,
It It M
N
It
N. C.
tt
11
It
Galveston, Tex,
It II
Galveston Entrance Lightship, Tex.
Galveston South Jetty, Tex.
190^-1906
USBF
1895-1911
US OFF
1925-1933
USBF
1873-1890
USCFF
1922-] 95A
USC&G3
1951-1952
USC&G3
1928-1940
UobF
1947-1955
wmc
1880-1SS7
USCFF
1878-1893
USCFF
1925-1950
USC&GS
19A6-1948
USC&GS
1880-1885
USCFF
1923-1928
USC&GS
1925-1940
USBF
1947-1956
NTOC
1878-1907
USCFF
1925-1934
USBF
1874-75
1877-1890
USCFF
1930-1954
USC&GS
1925-1934
USBF
1944-1954
USC&GS
1944-1954
USC&GS
1878-1887
USCFF
1925-1940
UdEF
1878-1899
USCFF
1925-1940
USBF
1947-1956
NWRC
1904-1908
USBF
1946
USC&GS
1883-1886
USCFF
1940-1954
USC&GS
1885-1892
USCFF
1878-1912
USCFF
1879-1922
USCFF
1925-1934
USBF
1878-1907
USCFF
1908-1910
USBF
1925-1934
USBF
1947-1956
NTOC
1873-1887
USCFF
1922-1954
USC&GS
1904-1905
USCFF
1930-1934
USBF
Pa£S
137
106, 107
108
109
77
78
75
37
71
93
123
124
12
126
57
58
67
68
69
66
96
81
70
118, 119
98
99
100, 101
102
U7
146
U8
8
Location
Gloucester, Mass.
Gloucester Point, Va.
Grand Isle (Drilling Platform), La.
Great Round Shoal Lightship, Mass.
Half Moon Reef Light Station,
Matagorda Bay, Tex.
Heald Bank Lightship
Indianola, Tex.
Jacksonville, Fla.
James River at Richmond, Va.
Kiptopeke, Va.
Key West, Fla.
Little Creek, Va.
Long Branch, N. J.
Martins Industry,' Lightship, S. C.
Matinicus Rock, Me.
MarTort, Fla.
Miami Beach, Fla.
Mobile, ila.
Montauk (Fort Pond Bay) L.I., N.Y.
Montgomery. Ala.
Moose Peak, Me.
Mt. Desert Rock, Me.
n It ti 11
Myrtle Beach, S. C,
Nantucket, Mass,
" New South Shoals Lightship
" Shoals Lightship
N It
It
H It
n
It M
It
New Haven, Conn.
New London, Conn.
Newport, R. I.
New York, N. Y.
" •» (Fort Hamilton), N.Y.
•• « (the Battery), N. Y.
Norfolk, Va.
North Charleston Terminals,
Coopor River, 3. C,
Period
Dource
P^Re
1878-1893
USCFF
27
1950-1954
U3C&GS
•
19-^9-1954
USC&GS
.
1891-1903
USCFF
35
1930-1935
USBF
U9
193C-1935
UoBF
U5
1873-1886
DSCFF
150
1875-18«7
USCFF
117
1876-1877
USCFF
89
1951-1954
USC&GS
■•
1874-1890
U^CFF
122
1933-1954
USC&GS
-
1954
USC&GS
.
1948-1954
USC&GS
-
1878-1911
USCFF
110
1878-1907
USCFF
18
1944-1954
USC&GS
.
1940-1951
USC&GS
-
1873-1887
USCFF
134
1947-1954
USC&GS
>
1873-1878
USCFF
135
1878-1880
USCFF
13
1878-1903
USCFF
15
1925-1955
USF7e
16, 17
1951-1954
USC&GS
-
1886-1890
USCFF
36
1878-1892
USCFF
38
1892-1912
USCFF
39, 40
1923-1925
USC&GS )
41
1925-1941
USBF )
* 1947-1955
NWRC
42, 43
1881-18S6
USCFF
53
1873-1887
USCFF
51
1947-1954
USC&GS
-
1881-1883
USCFF
48
1873-1890
USCFF
59
1911-1920
USC&GS
-
1927-1954
USC&GS
-
1873-1887
USCFF
91
1951-1952
USC&GS
-
Location
Old Point Comfort, Va,
Overfalls Lightship, Del.
Oyster Bayou Light Station, La.
Palm Beach, Fla.
Pensacola, Fla.
n ti
" Lighthouse, Fla.
Petit Manan, Me,
Philadelphia, Pa.
Point Au Fer Reef Light Station, La,
Point Lookout, Md,
Pollock Rip, liass.
Period
Source
Port \ransa3 (Pass),
Port Eads, La.
Port Isabel, Tex.
Portland, t/,e.
It n
Tex
n
n
Lightship,
It
He .
Portsmouth, N. H.
Provincetown, Mass,
Pulpit Harbor, Me,
Punta Rassa, Fla,
Race Point, Mass,
Rattlesnake Shoal Lightship, S, C.
Richmond, Va.
Rockport, Tex,
Sabine Pass Light Station, La.
Sand Island, Mobile Bay, Ala.
Sandy Hook Lightship, N. J.
" " , N. J.
n n n
tt n II
Savannah, Ga,
" Lightship, Ga.
Seguin Island, Me.
Ship Island Lighthouse, Miss,
Ship Shoal, La.
Shreveport, La.
Smlthville, N. C.
Solomons, Md.
Sombrero Key, Fla.
South Pass, La.
Southport, N. C.
19'i3-195'; USC&GS
190-i^-1909 USBF
1930-1934- USBF
i&ES.
72
Ul
19^6
USC&GS
^^
1881-1889
U3CFF
131
192/^-1954
USC&Go
1930-1931
USBF
132
1878-1902
USCFF
l/i
1923-U6,'5U U3C&G3
1930-1933
USBF
142
1885-1891
USCFF
83
1878-1900
USCFF
32
1925-1941
USBF
33
19^8-1956
WHFJC
34
1930-1931
USBF
151
1881-1883
USCFF
139
194^-1955
USC&GS
1873-1888
USCFF
22
1922-1945
USC&GS
.
1925-19a
USBF
23
19i;7-1956
NWRC
24
19U-1954
U3C&GS
1882-1884
USCFF
30
1945-1946
USC&GS
.
1873-1883
USCFF
125
1378-85
1890-1901
USCFF
31
1878-1895
USCFF
105
1947-1954
U^^C&GS
.
1948-1954
USC&GS
-
1930-1934
USBF
U3
1930-1933
USBF
133
1878-1892
USCFF
60
1881-1886
USCFF
62
1887-1893
USC&GS
1944-1954
USC&GS
„
1873-1887
USCFF
112
1947-1955
NWRC
111
1878-1906
USCFF
21
1930-1032
USBF
136
I904-I905
USBF
uo
1873-1878
USCFF
144
1880-1886
USCFF
103
1938-1954
USC&GS
-
1925-1934
USBF
121
1933
USBF
138
1946-1954
USC&GS
-
10
Location
Stingray Point, Va.
St. Johns Lightship, Fla.
H n n It
St. Marks, Fla.
St. Petersburg, Fla.
Stratford Shoal, Conn.
Vineyard Sound Lightship, Mass,
Washington, D. C.
H )l
Willets Point, N. Y.
Wilmington, N. C.
Windmill Point, Va.
Winter Quarter Lightship, Va.
II n It n
Wolf Trap Bar, Va.
Woods Hole, Mass.
H
H
N
N
n
n
York Spit, Va.
Period
bource
USCFF
Pag<
86,
I
1882-1922
87
1929-193i;
U3BF
lU,
115
1947-195A
N^C
116
1877-1879
USCFF
129
19^7-195/.
USC&GS
.
1878-1893
USCFF
54
1878-1910
USCFF
47
1882-1907
USCFF
80
19U-195A
USC&GS
.
1932-195^
U3C&GS
-
1873-1886
USCFF
104
1881-1922
USCFF
84,
85
* 1878-D899
USCFF
73
* 1925-19A0
USBF
74
1882-1892
USCFF
88
1880-1919
USCFF
)
1927-1929
USBF
)
1932-19a
USBF
)
44,
45, 46
19U-1956
U3C&GS
)
1882-1912
USCFF
90
References
Collier, A, (195U) A study of the response of oysters to
temperature and some long range ecological interpretations.
National Shell Fisheries Association, 1953 Convention
papers; pp. 13-38.
Ketchen, K, S, (1956) Climatic trends and fluctuations in
yield of marine fisheries of the Northeast Pacific.
J. Fish. Res. M. Canada. 13 (3); 357-37ii.
Parr, A. E. (1933) ^ geographical-ecological analysis of
the seasonal change in temperature conditions in shallow
water along the Atlantic Coast of the United States. Bull.
Bingham Oceanogr. Coll. h (3)j 1-90,
Rathbun, R. (1887) Ocean temperatures of the eastern coast
of the %ited States from observations made at twenty-four
lighthouses and lightships. Fisheries and Fishing Industries
of the United States, Appendix to section III, Washington,
Taylor, C, C,, H, B. Higelow and H. W, Graham, (1957)
Clmatic trends and the distribution of marine animals in
New England, Fishery Bulletin of tte Fish and Wildlife
Service (in edJI
U, S. Department of Ccmimerce, Coast and Geodetic Survey (1955).
Surface water temperatures at tide stations, Atlantic coast.
North and South America. Special Publication No. 278, Fifth
ed. (with data -through 195U) Washington,
Whitehouse, U, G., and A. N. Brown (1956). Analysis of air-
sea surface boimdary layer tanperatures records (1930-1935)
at fourteen fixed stations on the Gulf of Mexico. The A&M
College of Texas, Departnent of Oceanography. Ref, 56-liiT,
( T&ipublished manuscript).
12
o
Monthly and Annual Mean Surface <Vater Temperatures, F
o 0
EASTPORT, ioAINE 44 54 'N. 66 59'W.
Year Jan. Feb. Mar. Apr. May June July Au^. Sept. Oct. Nov. Dec. Ann.
1874 . _ , - 39.7 43.6 47.2 50.2 51.2 - 47.0 40.9 -
1875 35.1 -------- .-_
1876 -----__-- _-_
77 - - 30.5 32.8 35.4 39.5 43.5 46.4 47.7 47.7 46.0 42.1 (40.2)
78 37.2 34.6 34.6 36.7 40.5 43.7 47.2 49.4 50.1 49.9 45.6 a.6 42.6
79 36.8 34.2 33.5 35.5 39.8 43.2 47.9 50.3 50.6 49.3 44.8 40.3 42.2
1880 36.3 34.6 - 36.8 40.3 44.0 48.3 50.8 52.0 50.6 47.0 41.1 43.0
1881 37.0 32.9 33.9 36.3 - 43.5 46.7 48.8 49.2 48.0 45.0 40.9 41.8
82 36.7 33.4 - - 38.2 - 47.1 49.1 50.0 50.2 47.2 40.7 (43.0)
83 35.7 32.8 31.8 36.0 39.8 44.3 47.2 50.0 50.9 49.4 46.7 40.9 42.1
84 35.2 32.9 32.8 - 39.5 44.0 48.3 50.5 - 49.9 45.8 41.1 (42.3)
1885 37.3 34.0 33.4 36.3 39.2 43.2 48.0 52.0 51.9 51.2 48.2 43.6 43.2
1886 39.1 36.1 35.4 38.0 41.4 45.8 49.7 52.6 53.4 - - - (44.1)
87 38.0 35.6 34.7 37.0 41.0 44.8 49.4 52.0 52.7 50.9 46.8 42.4 43.8
88 36.7 33.3 33.3 36.1 39.7 43.6 47.5 50.9 51.0 49.0 46.2 42.0 42.4
89 39.2 36.4 37.2 - 42.4 45.9 50.8 52.1 52.9 50.8 48.0 43.1 (44.6)
1890 39.0 34.8 35.9 35.6 42.4 46.5 49.9 52.7 53.5 51.0 - - (44.1)
(14) (13) (12) (11) (14) (14) (15) (15) (14) (13) (13) (13)
Mean 37.1 34.3 33.9 36.1 40.0 44.0 47.9 50.5 51.2 49.8 46.5 41.6 42.7
April 1874 - Nov. 1880, Hayden Wharf; Dec. 1880 - Oct. 14, 1886, June 1887 - Oct
1890, South Side of Union Wharf; Jan. 1887 - May 1887, East side Gradys Wharf;
Oct. 14, 1886 - Dec. 1886, No observation due to fire - wharf was destroyed.
One reading per day.
Source - USCFF
13
o
Monthly and Annual Mean Surface Water Temperatures, F
o o
MOOSE PEAK, MAINE hk 28.5 'N. 67 32'W.
Year Jan. Feb. Mar. Apr. May June July Aug. Sept. Oct. Nov. Dec. Ann.
1878 ----- Vv.5 47.7 48.9 $0.3 50.2 - - -
79 ----- - 47.9 - - - - _ -
Mean ----- 44.5 47.8 48.9 50.3 50.2 -
Two readings per day, at first high water and first low water after 7 a.m.
Source - DSCFF
u
Monthly and Annual Mean Surface Water Temperatures, F
PETIT yANAN
I3UMD
1, MAINE
U 22'03"N.
67 51'51"W.
Year
Jan.
Feb.
Mar.
Apr.
May
June
July
AuK.
Sept.
Oct.
Nov.
Dec.
Ann.
1878
.
.
_
.
51.5
51.4
51.8
51.4
46.3
37.4
_
79
-
_
-
-
-
-
51.5
50.3
51.3
50.3
42.2
-
-
1880
-
-
32.7
37.4
43.7
45.9
50.3
53.6
55.7
50.4
42.6
35.8
-
1881
32.3
32.1
35.3
39.2
48.2
46.3
51.0
50.9
-
46.6
44.6
38.0
(43.2)
82
28.0
31.7
36.2
41.2
46.4
47.6
50.8
54.7
56.8
55.7
52.5
32.5
44.5
83
33.4
34.2
33.4
39.5
46.8
50.8
53.7
52.9
53.2
49.8
44.3
39.9
44.3
84
32.4
30.0
33.1
40.5
46.6
51.1
54.4
57.4
57.1
52.0
46.2
36.5
44.8
1885
34.9
31.8
33.5
39.1
45.7
50.3
53.6
55.9
53.9
51.0
47.6
43.8
45.1
1886
38.2
34.4
37.9
44.1
50.0
53.8
54.3
54.2
54.0
52.7
48.0
40.6
46.8
87
35.5
34.1
34.1
38.4
43.4
48.8
53.0
54.6
53.9
51.0
45.9
39.4
44.3
88
33.5
31.0
33.7
41.2
45.9
50.5
53.5
55.4
55.0
53.6
50.7
47.5
46.0
89
a. 2
33.8
34.6
38.3
45.4
49.4
52.6
54.7
54.8
54.2
52.2
49.9
46.8
1890
44.0
41.5
42.1
45.8
45.0
47.3
52.2
53.9
54.7
49.7
45.7
40.7
46.9
1891
34.3
33.5
33.2
37.2
42.2
44.0
50.5
52.0
51.4
47.9
44.9
41.3
42.7
92
37.0
35.0
35.7
38.8
42.7
46.3
49.0
51.8
51.0
48.8
44.4
40.0
43.4
93
35.2
32.3
33.6
36.9
42.1
46.5
49.8
52.5
52.0
50.1
46.6
40.9
43.2
94
34.2
33.0
35.0
38.7
42.6
48.0
53.0
51.5
51.0
50.1
43.8
35.1
43.0
1895
34.0
33.3
34.0
37.4
43.3
47.0
47.6
52.4
53.3
47.8
43.7
38.5
42.7
1896
35.0
33.4
33.8
39.9
44.9
47.7
51.2
54.0
53.4
50.2
43.7
37.8
43.8
97
35.2
33.0
34.4
39.5
42.8
47.8
51.0
54.5
52.9
48.1
44.3
37.5
43.4
98
34.0
33.7
35.8
38.3
42.6
47.2
51.5
53.6
52.9
49.0
44.4
38.7
43.5
99
33.8
33.3
35.1
37.7
45.5
47.7
-
51.0
52.9
51.6
46.6
39.9
(43.9)
1900
33.3
32.8
33.2
37.8
45.2
48.6
51.9
54.1
54.3
50.9
48.6
43.5
44.5
1901
35.3
30.7
33.6
38.7
47.2
52.4
54.9
54.8
52.8
(46.5) 42.2
36.2
43.8
02
32.4
34.2
37.0
39.6
43.7
48.2
55.4
""
~
"■
~
^
^
(22)
(22)
(23)
(23)
(23)
(23)
(24)
(24)
(23)
(24)
(24)
(23)
Mean
3/+. 9
33.3
34.8
39.4
4it.9
48.4
52.0
53.4
53.5
50.4
45.9
39.6
44.2
Two readings per day, at first high water and first low water after 7 a.m.
Source - D3CFF
15
o
Monthly and Annual Mean Surface Water Temperatures, F
o o
MOUNT DESERT ROCK 43 58'08"N. 68 07'44"W.
Year Jan. Feb. Mar. Apr. May Jvme July Aug. Sept. Q:t. Nov. Dec. Ann.
1878
49.8
49.8
50.6
_
_
_
^
79
-
-
-
-
43.3
44.6
-
-
-
-
-
-
-
1880
-
-
-
-
-
-
51.4
51.8
49.7
45.4
38.5
33.4
-
1881
.
_
_
^
_
.
—
.
.
.
41.9
37.1
—
82
37.9
34.7
35.8
37.5
39.6
-
-
50.1
49.4
49.5
45.6
-
-
83
-
-
-
37.9
41.0
-
-
-
50.2
46.5
45.2
40.0
-
eu
36.4
-
-
38.1
41.3
45.2
49.6
-
-
48.5
43.9
41.6
-
1885
-
-
-
-
40.1
44.3
50.3
54.2
51.6
49.4
47.5
-
-
1886
.
37.5
36.0
37.5
41.5
44.7
-
51.1
51.3
50.9
48.4
44.7
-
87
-
-
38.2
-
44.0
45.5
49.2
53.8
53.5
52.8
46.6
44.6
-
88
-
-
-
-
40.4
43.9
48,7
52.1
51.0
48.7
-
41.7
-
89
-
-
37.8
-
a. 8
47.1
54.8
54.2
54.5
49.4
48.6
44.6
-
1890
-
-
-
39.4
42.4
45.8
49.4
-
-
-
—
-
—
1891
_
.
..
.
a. 7
46.6
49.6
_
—
—
44.8
-
-
92
-
-
-
-
41.3
45.4
49.8
58.3
54.2
49.7
46.2
-
-
93
-
-
37.1
-
-
45.4
45.5
47.2
49.8
48.9
-
-
-
94
38.0
-
37.2
-
40.7
44.8
47.8
51.9
51.8
-
47.3
44.6
-
1895
-
-
-
-
42.0
44.4
48.1
49.6
50.3
51.5
50.3
-
-
1896
_
«
36.8
37.8
42.7
45.8
50.9
52.7
.
_
48.7
45.9
—
97
-
-
37.0
40.4
44.7
48.2
50.9
54.9
54.5
49.9
47.2
44.0
-
98
41.1
-
37.9
39.0
41.6
45.7
49.7
-
51.2
47.6
-
-
-
99
-
-
-
40.2
42.4
U.4
50.4
-
52.3
-
-
-
-
1900
-
-
-
-
-
49.0
-
-
-
51.0
48.7
43.5
—
1901
_
36.4
_
_
42.3
45.1
49.1
50.5
51.8
-
-
43.1
-
02
-
-
-
-
-
-
-
-
47.0
-
-
-
-
03
-
-
-
-
-
-
48.5
-
-
-
—
—
—
(4)
(3)
(9)
(9)
(19)
(20)
(19)
(15)
(18)
(15)
(16)
(13)
Mean
38.4
36.2
36.9
38.6
41.8
45.6
49.7
52.1
51.4
49.3
46.2
42.3
44.0
Headings at first high water and first low water after 7 a.m.
Source - USCFP
16
o
Monthly and Aruiual Mean Surface Water Temperatures, F
0 o
MOUNT DESERT ROCK 43 58'08"N. 68 07'U"W.
Year Jan. Feb. Mar. Apr. Ua.y June July Aug. Sept. Oct. Kov. Dee. Ann.
1925 ----- 46.1 - 52.7 48.3 45.0 42.5 40.0 -
1926 36.0 35.0 35.6 35.8 42.6 46.7 48.7 52.8 51.0 49.9 44.3 39.6 43.2
27 38.3 36.0 35.3 37.5 41.8 - - - - 49.6 45.4 39.4 (43.8)
28 36.5 36.1 37.2 39.3 43.3 47.3 51.8 54.4 54.1 49.5 46.6 40.1 44.7
29 37.4 37.1 38.8 38.3 42.7 48.0 49.6 54.6 52.2 48.8 43.6 40.2 44.3
1930 35.4 35.0 35.6 38.4 45.8 47.9 - 52.2 §1.1 49.5 48.0 - (44.2)
1931 _ _ - - - 49.2 51.5 51.6 50.2 48.0 45.8 42.6 -
32 - - - - U.3 44.1 47.5 54.5 53.0 - 46.9 41.1 -
33 38.5 37.3 37.2 38.6 40.8 44.7 49.8 52.4 50.6 48.5 43.6 40.0 43-5
34 36.2 32.7 33.1 35-3 39.5 45.4 50.6 52.3 51.8 48.5 44.9 40.0 42.5
1935 36.4 34.1 34.4 35.3 38.6 43.3 48.6 54.2 52.0 49.0 47.3 43.7 43.1
1936 39.2 36.0 38.3 40.1 42.3 45.3 47.6 52.6 51.9 49.2 45.8 42.8 44.2
37 40.0 38.8 37.3 U1.2 43.5 47.8 51.2 54.5 53.8 49.9 47.6 43-3 45.7
38 38.6 38.8 37.1 - 44-1 47.8 50.6 53.7 52.5 51.4 48.8 45.5 (45.7)
39 40.3 39.2 38.6 39.7 42.7 46.3 52.2 55.7 53.1 48.6 45. 0 40.2 45.1
1940 37.0 37.0 36.9 41.2 44.8 47.4 - - - _ - - -
(13) (13) (13) (12) (14) (15) (12) (U) (14) (14) (15) (14)
Mean 37.7 36.4 36.6 38.4 42.4 46.5 50.0 53.4 51.8 49.7 45.7 41.3 44.2
Readings daily at 8 A.M. and 6 P.M.
Source - U3BF
17
o
Monthly and Annual Uean Surface tVater Temperatures, F
MOUNT DESERT ROCK
LIGHTHOUSE
0
43 58'N.
0
68 08'W.
Year
Jan.
Feb.
Mar.
Apr.
May
June
JvOi^_
AuA.
Sept.
Oct.
Nov.
Dec.
Ann.
1952
53
54
1955
39.4
45.8
44.0
39.1
45.9
40.6
39.1
40.9
40.6
43.8
42.5
41.2
46.6
44.6
42.4
52.0
46.5
45.2
54.2
53.5
45.4
56.0
55.8
57.8
45.2
54.3
55.6
56.2
43.5
51.3
53.2
51.7
43.3
47.9
51.4
48.3
42.0
45.4
48.2
45.2
39.3
(48.0)
48.2
48.2
42.7
Mean
(3)
43.1
(3)
41.9
(3)
40.2
(3)
42.5
(3)
44.5
(3)
47.9
(3)
51.0
(4)
53.7
(4)
52.4
(4)
49.9
(4)
47.4
(4)
44.5
46.6
Readings at 8 am and 6 pm.
Source - USFWS
18
o
Monthly and Annual kiean Surface v;ater Temperatures, F
0 0
kATINICUS ROCK, MINE 43 47' 01"N. 68 51'20"W.
Year 'Jan. Feb. Mar. Apr. May June July Aug. Sept. Oct. Nov. Dec. Ann.
1878 - - -
79 -
1880 - - -
1881 - - -
82 -
83 -
84 -
1885 - - -
1886 - - -
87 -
88 -
89 -
1890 - - -
1891 - - -
92 -
93 -
94 -
1895 - - -
1896 - - -
97 -
98 - - 37.8
99 -
1900 - - _
1901 - - -
02 -
03 -
04 -
1905 - - 36.6
1906 - - _
07 -
(2) (12) (25) (28) (30) (28) (20) (6)
Mean - - 37.2 38.6 42.3 46.5 51.1 53.8 53.5 52.8
Readings at first high water and first low water after 7 a.m.
Source - USCFF
-
-
-
51.2
55.5
-
-
-
41.2
46.4
51.6
53.5
-
-
-
42.1
49.1
52.9
54.9
54.5
-
_
43.1
47.5
51.3
-
51.2
_
-
40.0
47.2
50.0
53.2
-
-
35.7
40.3
45.4
51.7
53.9
51.5
-
-
-
46.7
51.6
52.8
-
-
37.4
41.2
45.5
51.9
54.0
53.5
-
39.1
44.3
48.8
52.3
54.6
—
_
-
42.2
46.9
54.9
56.2
54.0
-
38.2
42.0
46.6
51.8
54.1
53.2
-
-
45.0
47.9
50.7
54.7
-
-
39.0
44.1
48.1
53.1
55.7
55.0
-
38.5
42.1
46.2
51.6
53.8
54.4
_
39.0
43.6
-
56.4
57.6
-
-
-
41.5
44.6
51.1
54.7
54.7
-
-
44.2
47.3
51.1
54.2
56.0
-
-
-
47.4
50.8
52.9
54.2
-
38.1
43.2
51.2
54.0
55.7
.
_
40.2
-
46.7
53.9
56.0
56.2
54.6
-
42.4
47.3
53.8
57.2
56.8
55.4
39.8
43.2
48.3
52.2
56.5
57.2
55.8
-
44.8
48.0
50.6
52.9
54.4
51.7
_
41.0
45.0
48.8
52.6
54.5
51.4
38.6
40.8
44.0
46.0
48.4
49.8
-
-
a.5
44.2
46.5
48.6
50.4
-
-
-
43.2
46.2
49.0
49.8
-
39.0
41.2
44.3
47.9
50.4
49.5
47.6
-
43.6
46.3
49.5
52.2
_
^
-
39.8
42.1
46.8
-
-
-
19
o
Monthly and Annual Mean Surface <Vater Tenperatures, F
BOOTHBAY HARBOR, ]
\iAINE
0
43 51'N.
0
69 38'W.
Year
Jan.
Feb.
54ar.
Apr.
May
June
July
Aug.
Sept.
Oct.
Nov.
Dec.
Ann.
1905
-
-
32.7
38.0
44.2
52.7
59.4
60.1
54.3
47.9
41.4
35.8
-
1906
34.9
31.4
31.3
37.7
44.9
51.7
58.5
6?.l
55.7
49.0
42.3
35.5
44.6
07
32.2
29.0
32.2
37.4
42.9
51.5
57.7
59.7
57.3
48.4
43.1
39.0
44.2
08
36.2
32.4
34.8
40.1
50.0
56.3
62.4
62.9
58.9
53.1
44.1
37.2
47.4
09
33.7
32.3
35.5
40.7
47.8
58.1
61.2
62.6
59.0
53.4
45.3
38.5
47.3
1910
34.6
33.5
37.2
45.3
50.0
57.2
64.0
63.1
59.4
50.9
46.7
36.4
48.2
1911
34.9
31.5
34.3
40.0
49.1
55.8
64.8
61.2
56.4
50.1
44.0
39.5
46.8
12
31.7
30.4
33.2
38.9
47.1
54.1
61.6
62.0
57.3
50.7
44.8
38.9
45.9
13
36.6
33.4
35.7
40.7
46.3
54.0
61.7
61.3
56.9
53.4
47.5
a. 8
47.4
14
34.1
29.9
31.9
37.1
46.0
53.0
58.4
59.8
56.4
50.4
42.1
34.6
43.6
1915
31.4
30.7
33.1
39.9
45.3
54.4
60.1
58.8
57.2
47.7
a. 8
36.3
44.7
1916
33.0
31.3
30.8
38.3
45.0
52.9
59.4
59.4
54.6
47.3
a. 3
35.4
44.1
17
33.0
29.9
31.9
36.6
40.6
51.3
59.8
62.6
53.9
48.0
40.3
31.9
43.3
18
28.1
29.5
33.0
38.8
49.0
54.0
62.3
62.0
56.6
49.8
44.3
37.5
45.4
19
34.5
34.5
36.8
a. 6
48.5
58.3
62.8
60.5
57.3
50.4
44.1
36.8
47.2
1920
29.9
29.4
35.6
39.7
49.7
55.5
61.6
64.1
57.0
53.5
43.8
39.8
46.6
1921
35.4
33.2
36.7
43.1
50.7
57.1
63.4
60.7
59.3
51.4
42.7
37.2
47.6
22
31.8
31.0
34.9
U.6
49.4
58.1
63.9
62.4
59.0
49.4
41.6
33.4
46.4
23
30.1
29.8
30.5
38.5
49.0
55.4
59.6
58.5
57.8
50.0
44.3
40.4
45.3
24
34.3
30.9
34.5
39.2
46.9
54.6
61.5
61.1
56.9
50.4
43.8
35.8
45.8
1925
29.6
31.5
35.5
40.6
48.0
55.5
61.4
61.2
56.1
46.8
41.5
36.8
45.4
1926
32.7
29.8
32.2
36.1
45.0
54.0
a. 2
61.4
56.3
50.3
43.5
35.6
44.8
27
33.4
32.5
34.5
38.6
47.1
55.7
60.9
60.4
56.8
51.1
44.6
38.7
46.2
28
36.0
33.0
34.9
39.1
46.6
55.0
63.1
64.6
57.4
51.7
43.8
38.0
46.9
29
34.5
33.1
33.7
37.7
46.1
58.8
57.9
58.7
55.5
49.0
42.6
32.7
45.0
1930
32.3
31.2
33.1
39.5
47.2
57.7
62.6
60.9
57.2
53.7
45.5
37.8
46.6
1931
38.0
36.5
38.7
43.5
48.1
59.6
64.2
60.4
58.0
50.1
45.2
38.3
48A
32
36.2
36.0
35.9
40.2
45.7
54.1
58.7
62.5
56.9
50.5
46.5
38.9
46.8
33
38.0
38.0
38.2
41.6
50.3
57.1
61.6
62.1
55.8
48.3
42.8
35.5
47.4
34
31.8
30.1
31.9
41.1
50.2
56.6
61.5
60.0
59.1
46.9
U.3
36.2
45.6
1935
32.0
32.0
34.8
41.1
47.0
56.5
62.4
62.3
57.4
50.9
45.2
37.9
46.6
1936
33.7
31.3
37.4
40.7
46.0
53.1
60.5
61.6
57.3
48.0
39.3
36.0
45.4
37
36.0
36.0
37.5
a. 3
48.7
56.6
61.5
64.2
57.9
51.1
45.0
41.7
48.1
38
34.4
31.7
32.3
37.5
43.8
56.0
59.6
60.2
54.3
49.8
43.8
37.3
45.1
39
34.1
32.0
32.0
34.6
44.4
49.8
57.1
60.0
54.7
48.0
40.9
33.7
43.4
1940
31.4
29.1
30.0
36.2
47.9
51.9
59.5
58.9
56.3
49.2
45.0
39.7
44.6
(continued)
20
BOOTHBAI HARBOR, MAINE - Continued
Year Jan. Feb. Mar. Apr. May June July Aug. Sept. Oct. Nov. Dec. Ann.
19A1 36.2 33.2 35.5 U.7 48.3 53.2 60.6 57.0 52.1 50.4 44.8 39.5 46.0
42 34.6 32.0 33-9 39.8 49.8 56.3 60.1 60.0 57.3 52.8 45.0 37.4 46.6
43 32.8 32.9 33.6 37.0 46.1 53.1 55.5 59.9 54.7 51.7 46.7 40.1 45.3
44 34.1 34.0 34.0 38.6 48.2 52.9 60.8 60.5 58.7 51.0 45.8 39.2 46.5
1945 36.5 33.6 35.8 43.5 47.6 53.5 59.8 61.7 58.3 51.0 45.7 37.1 47.0
1946 33.5 33.7 37.5 40.4 46.5 53.6 60.3 60.4 58.8 52.5 47.7 a. 3 47.2
47 36.5 35.6 36.5 41.1 46.7 54.0 63.2 63.4 60.5 55.9 48.6 40.0 48.5
48 34.6 32.4 34.8 40.5 47.5 53.6 60.5 61.2 56.9 48.0 47.6 42.5 46.7
49 38.4 36.0 37.0 42.9 50.9 57.3 - - - - 49.7 44.3 -
1950 42.2 38.1 38.0 40.7 47.9 55.7 61.8 63.0 57.5 53.7 50.2 45.9 49.6
1951 43.0 39.4 40.5 44.6 51.3 57.7 63.1 63.7 61.9 55.0 51.1 46.2 51.5
52 41.4 39.6 39.6 43.5 49.5 56.3 62.8 62.6 60.6 54.3 46.9 43-7 50.1
53 40.5 41.9 43.0 45.5 52.2 57-7 62.8 62.8 61.0 55.4 51.3 48.4 51.9
54 39.6 38.3 40.8 44.6 50.5 57.0 60.5 59.8 58.7 55.8 50.6 46.6 50.2
1955 42.1 38.4 39.6 44.4 50.7 56.5 62.2 62.7 59.0 54.8 49.8 40.8 50.1
(49) (49) (50) (50) (50) (50) (49) (49) (49) (49) (50) (50)
Mean 34.6 33.1 35.1 40.2 47.6 55-1 61.0 61.3 57.3 50.9 45.0 38.6 46.7
Boothbay Harbor Fisheries Station '.Vliarf. Records since May 1951 based on hourly
readings of continuous thermograph.
Source - U3FWS
21
Monthly and Annual Mean Surface Water Temperatures, F
SEGUIN ISUKD
0
43 42'26"N
o
. 69 45'32"'W.
Year
Jan.
Feb.
Mar.
Apr.
May
June
July
AuK.
Sept.
Oct.
Nov.
Dec.
Ann.
1878
_
_
_
_
.
52.3
55.2
56.1
56.8
.
_
^.5
^
79
35.9
33.8
33.8
36.6
-
51.1
54.8
57.4
55.6
50.9
43.1
35.8
(44.5)
1880
32.6
35.0
35.4
39.1
47.2
53.4
56.0
55.9
56.4
49.8
43.7
38.3
45.2
1881
34.0
33.8
34.0
37.8
44.7
50.1
52.4
55.9
56.2
49.7
44.6
41.0
44.5
82
37.4
35.8
34.3
37.5
43.2
51.6
54.9
56.3
54.5
51.4
45.7
37.6
45.0
83
31.8
31.4
32.8
37.8
44.6
53.2
56.2
55.2
53.2
48.4
44.6
37.6
43.9
84
32.3
31.9
32.8
37.5
45.6
52.2
55.0
56.7
55.4
50.4
44.4
38.6
44.4
1885
33.8
30.2
31.2
37.1
44.8
49.9
57.4
55.5
54.0
50.4
46.7
41.1
44.3
1886
34.6
32.6
32.9
37.3
43.9
50.4
56.0
56.8
56.5
51.3
46.5
39.4
44.8
87
36.2
34.0
35.0
37.6
46.0
51.5
56.3
58.2
54.5
50.5
45.2
41.1
45.5
88
34.2
32.4
32.6
36.4
43.7
50.9
53.3
56.1
54.7
49.1
44.4
40.2
44.0
89
38.6
34.4
36.8
-
-
54.3
56.8
55.6
55.6
50.3
45.7
41.9
(46.1)
1890
36.9
35.9
34.7
39.8
47.5
54.5
60.0
60.9
59.6
52.2
44.3
34.6
46.7
1891
32*3
33.3
-
—
43.9
51.6
52.2
54.9
54.2
49.1
_
39.2
(44.0)
92
34.2
33.2
33.2
38.7
43.2
51.4
-
56.0
55.0
-
-
-
(44.6)
93
-
-
-
37.5
44.0
51.0
55.6
-
53.2
51.4
-
38.8
-
94
-
32.9
34.6
-
-
51.9
-
-
-
-
-
39.8
-
1895
36.3
-
34.6
40.0
-
52.4
-
-
-
-
-
-
-
1896
—
_
»
_
.
«.
.
.
»
51.0
.
-
_
97
36.6
-
-
-
-
-
-
-
-
-
-
-
-
98
38.2
-
-
-
-
-
-
-
-
-
-
-
-
99
—
—
-
—
—
53.4
-
—
—
-
—
—
—
(17)
(15)
(15)
(14)
(13)
(19)
(15)
(15)
(16)
(15)
(12)
(15)
Uean
35.0
33.4
33.9
37.9
44.8
52.0
55.5
56.5
55.3
50.4
44.9
38.9
44.9
Readings at first high water and first low water after 7 a.m.
Source - USCFF
22
o
Monthly and Annual Mean Surface tVater Ten^eratures, F
PORTLAND,
EiAlI^r,
0 0
43 39'20"N. 70 U'38"W.
Year
Jan.
Feb.
Uar.
Apr.
May
June
July
Auk.
Sept.
Oct.
Nov.
Dec.
Ann,
1873
60.6
56.5
52.5
42.4
35.0
74
33.9
30.4
-
37.4
45.8
55.1
58.9
59.3
57.5
53.4
46.4
36.9
(46.6)
1875
30.2
30.5
—
"
"
"•
"■
""
"■
—
~
■"
"
1876
77
"
—
36.0
42.2
48.7
55.3
58.2
62.5
59.0
52.2
45.6
40.3
(47.0)
78
33.9
33.4
37.2
43.8
49.8
56.7
60.9
60.7
59.8
53.5
44.4
38.8
47.7
79
33.0
31.8
32.9
37.2
47.8
52.9
55.9
59.5
-
57.5
42.4
37.7
(45.5)
1880
33.1
32.5
33.0
37.0
48.0
56.4
60.6
59.7
58.6
51.4
44.3
34.8
45.8
1881
31.3
31.2
35.7
40.7
_
56.0
60.7
61.5
59.6
—
44.5
38.4
(46.6)
82
33.1
32.9
-
-
45.5
-
58.5
59.9
57.4
53.1
44.4
35.4
(45.7)
83
30.9
30.5
32.0
38.5
43.7
53.0
61.6
61.4
55.4
50.8
45.7
35.8
44.9
84
31.1
31.9
33.6
41.4
46.9
54.9
-
-
-
51.6
43.2
37.0
(45.8)
1885
33.9
31.4
32.0
37.9
46.7
53.1
60.2
62.5
55.5
51.8
45.6
38.5
45.8
1886
33.1
31.8
33.7
a. 9
49.9
56.0
59.4
59.7
58.9
52.3
45.5
35.6
46.5
87
31.5
33.0
34.7
40.2
49.7
55.0
61.6
61.4
56.9
51.5
44.0
39.1
46.6
88
"■
31.0
32.6
38.6
46.2
-
57.0
60.0
56.9
49.9
~
~
~
(12)
(13)
(11)
(12)
(12)
(11)
(12)
(13)
(12)
(13)
(13)
(13)
Mean
32.4
31.7
33.9
39.7
47.4
54.9
59.4
60.7
57.7
52.4
44.5
37.2
46.0
April 1873 - February 1875, Grand Trunk Railroad VJharf; March 1887 - February 1879,
Casco Bay, foot of Grand Trunk Wharf; March 1879 - October 1888, Foot of Custom House
Wharf, Portland Harbor.
Readings once per day
Source - USCFF
23
o
Monthly and Annual Mean Surface '.Vater Tanperatures, F
PORTLAND LIGHTSHIP
0
43 31.5
0
'N. 70 05.5
'W.
Year
Jan.
Feb.
Mar.
Apr.
May
June
July
Aug.
Sept.
Oct.
Nov.
Dec.
Ann.
1925
-
-
-
-
-
52.7
56.7
58.2
55.8
47.3
43.0
39.6
-
1926
38.0
36.4
36.4
40.2
48.6
_
-
—
-
_
-
40.0
-
27
36.7
35.0
34.5
39.1
44.2
52.6
57.0
58.0
55.9
51.1
46.8
42.5
46.1
28
L0.9
37.7
37.4
38.9
44.9
52.1
-
-
57.3
52.3
47.2
43.6
(47 JV)
29
40.3
36.0
35.6
38.4
43.9
55.7
54.9
56.0
55.5
49.5
45.1
39.4
45.8
1930
35.7
34.0
33.6
37.2
44.2
-
60.4
60.2
58.4
50.8
45.6
41.4
46.0
1931
38.2
34.1
32.3
36.3
42.2
51.2
57.0
57.5
55.6
50.8
44.4
40.0
45.0
32
37.0
36.0
34.5
36.6
43.4
48.6
-
-
-
-
44.8
40.6
(45.4)
33
37.9
36.8
38.2
39.8
47.2
53.2
55.7
-
-
49.0
43.0
37.6 (46.1)
34
33.4
30.8
29.5
34.0
42.2
49.0
57.6
55.5
54.3
48.3
44.5
40.6
43.3
1935
35.2
29.6
31.2
35.1
42.7
52.7
58.8
61.5
56.9
-
-
U.5
(45.4)
1936
39.1
36.1
36.6
38.1
46.1
54.0
58.8
60.3
56.4
51.4
46.5
41.8
47.1
37
39.1
36.2
36.5
38.4
48.0
56.5
62.6
62.1
58.2
51.3
46.2
46.2
48.4
38
36.6
35.6
36.3
40.5
46.5
55.0
57.0
-
55.2
49.8
43.2
38.7
(46.1)
39
34.9
33.1
34.3
35.3
39.3
-
-
61.6
58.1
51.5
44.0
38.6 (45.1)
1940
35.6
34.1
35.0
35.6
45.3
52.4
55.6
56.4
-
-
-
-
(45.5)
1941 -------- 54.5
(15)
(15)
(15)
(15)
(15) (13)
(12)
(11)
(13)
(12) (13) (15)
37.2
34.8
34.8
37.6
44.6 52.7
57.7
58.8
56.4
50.3 48.7 40.8
Mean 37.2 34.8 34.8 37.6 44.6 52.7 57.7 58.8 56.4 50.3 48.7 40.8 46.2
Two readings per day at 8 A.M. and 6 P.M.
Source - USBF
24
o
Monthly and Annual Mean Surface Water Temperatures, F
o o
PORTLAND UGHTSHIP 43 32 'N. 70 06'W.
Year
Jan.
Feb.
Mar.
Apr.
May
June
Juli_
Aug..
Sept.
Oct.
Nov.
Dec.
Ann.
1947
.
.
_
_
_
_
_
.
.
_
45.4
.
48
41.8
38.4
37.2
38.3
43.4
51.0
58.6
60.8
-
-
48.3
44.3
-
49
40.0
40.0
37.9
41.3
44.8
50.6
61.6
62.6
58.4
-
-
-
-
1950
42.6
37.5
35.7
39.1
45.4
50.7
57.0
60.8
56.8
53.2
-
-
-
1951
41.4
38.7
38.5
40.6
47.6
53.4
61.2
_
_
_
43.0
38.6
_
52
36.6
35.1
35.8
41.5
46.2
51.1
60.1
-
-
-
-
-
-
53
38.5
37.9
39.9
42.4
49.2
55.6
61.0
61.4
-
-
50.2
46.8
-
54
39.3
-
38.5
41.0
45.8
53.9
57.0
57.6
56.1
-
-
44.7
-
1955
41.4
38.4
38.1
41.4
47.0
54.1
62.6
62.8
-
55.3
49.8
43.8
-
1956
39.2
37.7
36.9
38.6
43.1
50.4
52.8
60.1
-
-
-
-
-
(9)
(8)
(9)
(9)
(9)
(9)
(9)
(7)
(3)
(2)
(4)
(6)
Uean
40.1
38.0
37.6
40.5
45.8
52.3
59.7
60.9
57.1
54.2
47.8
43.9
48.2
Readings at 0130, 0730, 1330, and 1930 EST.
Source - NWRC
25
o
Uonthly and Annual llean Surface Water Temperatures, F
BOOK
1 ISUNC
1
0 o
43 07'N. 70 28'W
•
Year
Jan.
Feb.
Uar.
Apr.
Uay
June
July
Aug.
Sept.
Oct.
Nov.
Dec.
Ann.
1878
79
1880
-
-
-
-
46.4
55.5
59.0
61.7
60.6
58.7
63.0
58.6
59.3
55.2
-
-
-
1881
82
83
84
1885
-
-
-
-
-
49.5
57.3
58.4
-
-
-
-
-
-
-
-
-
42.0
52.5
50.0
60.0
59.6
61.3
56.1
52.5
-
-
-
1886
87
88
89
1890
39.1
42.1
-
39.7
41.5
39.9
39.2
40.3
40.8
50.1
48.8
47.6
48.8
53.7
54.9
59.4
58.7
56.6
61.6
60.8
59.9
61.0
62.0
60.9
61.4
61.2
61.2
62.0
56.6
55.9
57.8
58.2
61.3
51.5
48.7
39.4
-
1891
92
93
94
1895
-
38.0
37.3
38.0
38.3
37.9
40.7
39.9
39.6
42.0
45.8
45.6
U.8
45.5
48.1
53.2
53.4
50.9
51.2
55.9
61.2
60.9
60.3
60.0
61.8
61.9
62.9
59.4
61.5
62.5
60.2
61.6
57.0
56.8
57.4
57.1
54.2
51.4
-
44.4
42.4
-
1896
97
98
99
1900
-
-
-
41.4
48.6
55.4
54.6
61.5
60.2
62.8
63.2
59.6
-
-
44.6
-
-
-
41.1
41.9
44.6
47.4
52.4
51.3
59.1
57.6
62.6
63.2
-
56.2
50.7
-
-
1901
02
03
04
1905
-
-
37.2
44.0
46.8
49.1
51.5
51.4
52.8
53.4
53.0
56.1
56.0
56.1
57.6
57.6
63.4
62.2
59.5
60.4
60.6
62.6
63.7
63.8
62.9
59.1
62.3
-
-
-
1906
07
08
-
-
-
-
44.8
42.5
53.7
53.0
51.1
59.8
57.2
62.6
62.4
61.8
-
-
-
-
Uean
(2)
40.6
(2)
37.6
(6)
38.7
(13)
a.2
(17)
46.7
(27)
53.6
(25)
59.5
(27)
61.4
(18)
59.6
(9)
55.5
(2)
49.7
(4)
42.7
48.9
Readings at first high water and first low water after 7 a.m.
Source - USCFF
26
o
Uonthly and Annual Uean Surface Water Temperatures, F
o o
CAPE ANN, MASSACHUSETTS 42 38.3'N. 70 34.5'W.
Year Jan. Feb. Mar. Apr. May June July Aug. Sept. Oct. Nov. Dec Ann.
1878 ------- 59.7 58.7 54.0 47.2 a.7 -
79 36.5 34.6 35.0 37.5 45.3 54.7 58.6 - - - - - -
1880 - - - _ _ - 60.3 58.6 58.2 52.0 46.0 39.1 -
1881 34.5 33.1 35.0 38.8 46.3 54.8 60.9 61.2 60.9 53.6 46.2 39.9 47.1
82 35.5 37.0 - - 45.2 - 63.6 59.6 57.3 54.1 47.3 40.2 (47.4)
83 34.8 34.4 35.0 39.6 45.9 55.5 59.2 - - - - - -
(4) (4) (3) (3) (4) (3) (5) (4) (4) (4) (4) (4)
Mean 35.6 34.8 35.0 38.6 45.7 55.0 60.5 59.8 58.8 53.4 46.7 40.2 47.0
Readings at first high water and first low water after 7 a.m.
Source - DSCFF
27
Monthly and Annual Mean vSurface vVater Temperatures, F
GLOUCESTER, MSShCHUSETTS 42 36'N. 70 39 'if.
Year Jan. Feb. Mar. Apr. May June July Aug. Sept. Oct. Nov. Dec. Ann.
1878 - - - - 53.5 57.8 - 62.9 - . - - _
79--------- 55.7 44.1 38.9 -
1880 35.9 34.3 37.5 40.8 52.7 60.1 64.2 63.7 59.9 51.6 42.9 35.3 48.2
1881 32.9 33. « 35.9 39.7 49.4 56.4 66.0 67.2 62.8 52.1 46.4 38.6 48.4
82 32.7 - 36.8 45.6 49.0 55.6 62.8 66.1 54.6 49.0 43.6 32.9 (46.7)
83 - - - 41.3 48.4 62.1 73.1 63.0 53.9 47.8 a.4 34.9 (47.0)
84 28.5 31.4 33.5 41.0 48.7 58.2 67.2 69.8 64.3 53.0 44.2 36.0 48.0
1885 32.5 - - 37.2 48.9 61.3 69.2 68.9 66.5 53.1 45.7 39.9 (49.1)
1886 32.4 30.0 31.7 40.9 50.7 62.0 69.4 68.0 55.2 44.9 46.4 39.4 47.6
87 32.3 30.5 34.1 40.6 48.0 56.9 64.8 69.8 64.2 52.2 44.0 39.9 48.1
88 33.8 28.6 32.8 39.2 47.6 56.8 63.8 65.3 58.8 50.6 45.9 - (46.8)
89 39.2 --- -- _-_ 51.2 47.2 42.9 -
1890 38.7 37.4 37.6 41.8 ----- - 46.7 37.4 -
1891 35.2 36.9 - - -- - - - --41 .9-
92 37.8 35.0 34.7 ------ _---
93 - 32.4 ------- ----
(12) (10) (9) (10) (10) (10) (9) (10) (9) (11) (12) (12)
Mean 34.3 33.0 35.0 40.8 49.7 57.7 66.7 66.5 60.0 51.0 44.9 38.2 48.1
Gloucester Harbor Fort Wharf. Sept, 1883, East Gloucester; June 1885, Gloucester;
Jan. 1888, East Gloucester; April 1888 Hatcheiy
Readings at first high water and first low water after 7 a.m. until April 1888, thence
at 7 a.m., 12 m. and 5 p.m.
Source - DSCFF
28
Monthly and Annual kean Surface vVater Temperatures, °F
BOS'
ION, MA
?S.
42"22'
•N. 7
1°03'W
•
Year
Jan.
Feb.
Mar.
Apr.
May June
July
Aug.
Sept .
Oct.
Nov.
Dec.
Ann.
1873
74
75
35.3
-
-
-
-
-
60.0
51.9
39.2
35.6
-
1876
77
—
^
.
^
^ ^
_
^
^
^
^
"
"■
78
79
-
-
-
-
-
-
-
-
-
-
-
-
80
-
-
-
-
-
-
-
-
-
-
-
—
1881
82
83
84
85
31.3
30.8
33.0
32.7
31.4
33.0
29.2
32.4
35.1
31.2
41.7
41.8
42.2
60.1
49.1 -
52.7 61.3
51.7 -
51.2 58.9
63.1
65.9
62.3
66.1
64.1
64.0
63.2
67.7
65.8
62.3
61.9
61.2
60.1
56.3
52.4
54.4
53.8
45.3
45.8
38.9
45.9
38.8
34.7
36.4
(48.6)
(48.1)
(47.7)
48.0
1886
87
88
89
90
31.9
30.6
33.8
38.8
39.6
3L.8
32.8
32.6
34.1
36.9
34.8
34.4
34.0
37.9
38.4
46.0
42.5
40.7
45.4
45.2
55.2 58.9
55.5 61.3
48.0 60.0
56.0 60.7
54.1 62.8
67.2
66.2
64.2
65.6
66.4
64.5
66.3
63.6
65.2
64.0
62.2
62.7
65.1
63.8
53.9
54.9
51.0
51.6
54.5
46.2
47.6
45.6
48.4
37.2
38.0
42.2
(49.3)
(49.2)
48.1
50.8
Mean
(9)
33.9
(9)
32.7
(8)
34.8
(8)
43.2
(9) (8)
52.6 60.5
(9)
65.2
(8)
64.8
(11)
62.6
(10)
53.5
(9)
4A.8
(7)
37.6
48.8
1873 - long Wharf J 1881 - Rowes iVharf, Boston Harboj
One reading per day at 2 p.m., Washington Time
Source - USCFF
29
Monthly and Annual Mean Surface Water Temperatures, °F
B05T0N LIGHTSHIP 42°20'N 70°45'W.
Year Jan. Feb. Mar. Apr. May Jiuie July Aug. Sept. Oct. Nov. Dec. Ann.
1925
-
-
-
-
-
56.6
60.3
64.4
60.0
-
45.2
a.o
-
1926
37.0
34.5
33.8
36.7
45.6
_
.
—
—
_
—
41.8
—
27
38.5
37.3
34.0
37.3
44.2
51.8
56.3
62.2
60.5
55.1
48.4
43.3
47.4
28
39.2
36.4
36.6
39.8
47.5
55.3
58.5
62.0
60.6
53.4
49.8
44.6
48.6
29
39.9
37.5
37.2
40.2
45.3
58.3
58.4
57.9
60.5
52.9
49.4
42.1
48.3
30
37.9
34.8
35.8
38.4
47.8
53.6
59.7
61.6
61.3
53.9
48.4
44.2
48.1
1931
39.8
36.1
36.8
Ll.O
46.2 56.5
60.2
60.8
61.1
54.5
49.5
44.2
48.9
32
40.0
37.7
36.4
39.8
48.3 54.9
58.0
59.4
59.5
54.1
49.3
44.8
48.5
33
41.0
38.4
37.7
39.4
47.7
55.6
61.3
64.0
60.9
55.0
47.3
41.2
49.1
34
36.0
32.9
33.2
39.5
45.2
56.3
61.8
60.5
60.3
54.6
47.8
43.6
47.6
35
37.5
34.0
35.5
38.5
44.4
53.7
62.1
63.5
58.9
53.8
50.0
43.3
47.9
1936
38.3
33.6
35.5
40.3
46.6 56.0
62.0
61.9
57.1
49.5
42.7
36.9
46.7
37
38.7
38.3
37.1
39.8
48.0 58.0
65.4
65.2
62.5
54.8
47.5
42.4
49.8
38
38.4
37.0
37.9
42.3
48.4
57.3
59.5
63.6
60.8
54.4
47.3
44.6
49.3
39
39.3
36.6
36.1
38.4
47.2
57.1
63.5
63.5
60.8
54.4
47.3
42.0
48.8
40
36.1
31.5
32.7
37.5
-
56.9
63.9
-
60.8
55.1
48.5
42.9 (47.9)
19a
35.7
34.2
-
-
-
-
50.8
-
-
-
-
-
-
(16)
(16)
(15)
(15)
(14)
(15)
(16)
(14)
(15)
(14)
(15)
(16)
Mean
38.3
35.7
35.8
39.3
46.6 55.9
60.1
62.2
60.4
54.0
47.9
42.7
48.2
Readings at 8 a.m. and 6 p.m.
Source - USBF
30
o
Monthly and Annual Mean S\irface Water Temperatures, F
PROVINCSTO™, MASSACHUSETTS U2 03'N. 70°ll«W.
Year Jan, Feb. Mar. Apr. May June July Aug. Sept, Oct. Nov. Dec. Ann.
1882 - . . U3.3 U7.5 - 70.U 71.$ 62.5 56.2 U7.9 38. U -
83 33.3 32.6 33.0 UO.8 53.0 66.2 68.1 67.1 62.1 5U.1 U7.9 39.6 49.9
8U 33.6 3U.9 35.U ..-.
(2) (2) (2) (2) (2) (1) (2) (2) (2) (2) (2) (2)
Mean 33.7 33.8 3U.2 U2.0 50.2 66.2 69.2 69.3 62.3 55.2 U7.9 39.0 50.2
Foot of Railroad Vftiarf , Provincetown Harbor,
One reading per day at 2 p.m., Washington Time
Source - DSCFF
31
o
Monthly and Annual Mean Surface Water Temperatures, F
RACE
; POINT,
CAFE
COD BAY,
PROVINCETO'-VN
, MASSACHIEETTS
0
42 03 .5 "N
0
. 70 15 "W.
Year
Jan.
Feb.
Uar.
Apr.
May
June
Jul2_
Auk.
Sept.
Oct.
Nov.
Dec.
Ann.
1878
79
1880
-
-
45.2
45.9
47.3
55.2
56.0
52.5
66.0
62.6
64.0
65.8
61.6
59.1
57.2
56.2
46.0
47.5
3L.7
40.8
-
1881
82
83
84
1885
1886
87
88
89
1890
34.0
35.2
36.3
42.4
37.1
39.2
37.9
39.8
36.7
44.3
39.1
33.2
44.3
46.4
46.1
50.7
49.2
41.1
45.0
46.4
50.4
57.0
55.2
61.8
64.8
72.9
71.7
69.9
70.9
70.8
71.0
70.4
72.8
67.1
64.8
67.8
69.6
56.1
58.3
56.1
71.7
59.3
56.5
45.4
54.9
44.6
58.6
iUf.6
43.9
42.2
41.6
53.0
45.2
a.9
39.3
33.2
52.1
50.0
51.2
51.2
51.3
55.7
37.2
37.8
38.0
44.8
51.2
57.9
67.9
67.9
64.1
56.5
49.1
40.5
51.1
1891
92
93
94
1895
35.3
37.4
35.3
37.6
36.0
35.8
36.4
34.4
36.2
33.5
35.4
37.4
36.4
37.3
34.0
41.3
40.0
42.3
41.4
38.5
50.2
47.4
49.1
47.6
46.9
59.8
57.2
55.5
55.9
55.4
64.0
68.9
61.8
64.2
63.2
63.3
65.8
68.1
65.1
67.8
63.4
61.9
62.4
58.7
66.5
56.4
57.6
51.9
53.7
62.0
47.2
46.5
49.0
47.7
53.2
42.0
39.5
43.4
40.7
46.7
49.5
49.7
49.1
48.8
50.3
1896
97
98
99
1900
39.8
36.4
38.0
36.1
38.0
35.6
35.4
36.0
34.3
35.3
37.4
38.2
39.5
35.3
36.0
38.9
44.6
44.9
42.5
41.3
46.0
50.1
48.4
52.4
47.7
61.1
57.0
56.8
56.1
56.0
67.9
63.0
66.7
61.0
68.0
68.5
64.8
67.9
65.6
69.7
64.6
64.5
64.1
63.3
67.8
57.2
58.1
57.6
58.0
59.6
50.0
50.2
48.2
51.8
50.9
43.6
42.8
40.7
44.6
44.4
50.9
50.4
50.7
50.1
51.2
1901 39.2 35.7 35.9 39.5 46.2 55.4 63.4 66.6 64.8 55Jlf -
(16)
(17)
(18)
(19)
(19) (19)
(17)
(18)
(19)
(19) (18) (18)
37.1
36.2
38.5
43.4
50.8 60.1
66.3
66.7
62.5
55.7 47.9 41.8
Mean 37.1 36.2 38.5 43-4 50.8 60.1 66.3 66.7 62.5 55.7 47.9 41.8 50.6
Readings at first high T«iter and first low water after 7 a.m.
Source - OSCFF
32
o
Monthly and Annual Mean Surface Water Temperatures, F
POLLOCK RIP
Ul 32 'N. 69 55 'W.
Year
Jan.
Feb.
Mar.
Apr.
May
June
July
Aug.
Sept.
Oct.
Nov.
Dec.
Ann.
1378
79
1880
35.8
liO.O
36.3
35.U
35.9
38.U
50.0
59.3
55.6
53.0
57.3
56.9
56.9
58.3
57.5
58.1
(57.U)
55.8 U7.U
55.0 U7.2
(53.5) U6.5
Ul.3
42.5
39.8
U8.1
1881
82
83
8U
1885
3U.9
38.1
3U.9
37.3
39.9
32.5
36.7
3U.2
38.1
33.3
35.5
35.8
33.7
36.7
3U.1;
38.1
36.3
38.6
UO.6
39.2
U7.1
lil.5
U5.7
U6.6
Uh.3
57.6
U9.1
52.1i
52.3
50.9
59.6
56.1
52.9
56.)4
58.2
5ii.7
57.2
56.U
60.9
5U.7
56.6
58.5
53.3
53.9
50.8
53.9
51i.3
U5.3
U6.6
U7.3
U9.U
38. U
U0.5
UU.U
UU.6
(U7.1)
U5.1
U5.U
U7.5
U7.5
1886
87
88
89
1890
37.2
39.2
36.5
39.3
Ul.3
3U.6
37.3
3U.1
35.3
39.2
35.2
35.U
3U.1
36.3
37.9
U2.3
38.3
37.8
39.3
UO.7
U7.U
U5.6
U3.7
U6.0
U5.0
52.6
53.3
U9.9
51.2
52.8
57.7
57.2
56.U
55.3
59.1
57.6
57.7
58.3
55.5
58.3
58.3
53. U
55.1
58.1
55.8
53.7
5U.0
51.7
51.9
5U.5
U9.'4
U7.3
U8.0
U8.2
U7.8
U3.8
U3.3
Ul.2
UU.2
U2.0
U7.5
U7.3
U5.6
U6.8
U7.9
1891
92
93
9U
1895
38.2
39.6
35.5
37.9
37.8
37.2
35. U
3U.6
36.0
33.9
36.9
35.U
35.0
37.1
3li.8
Uo.6
Ul.3
37.7
39.1
38.9
li5.6
U6.3
U3.2
Uli.5
U6.1
51.3
53.7
li9.5
U9.3
5U.0
55.7
55.7
53.0
52.9
55.8
55.0
59.ti
59.1
56.2
59.1
59.0
55.2
5U.0
57.5
53.7
52.9
52.8
50.0
53.0
U7.5
1;6.5
U7.5
U6.2
U7.3
U3.7
U1.6
U2.7
Uo.3
U3.U
U7.0
U7.2
U5.9
U5.U
(U6.7)
1896
97
98
99
1900
Uo.i
lil.O
39.0
38.7
37.6
35.3
37.1
38.2
liO.U
37.0
35.8
33.9
Ul.U
U0.5
39.3
U7.U
li7.7
U6.5
U7.6
16.5
53.0
5u.3
55.1
52.U
52.8
58.1
56.2
56.2
60.5
60.0
57.6
58.3
59.9
58.1
5U.5
5U.5
5U.U
53.9
50.U
U9.2
U9.9
li3.9
U5.1
U3.9
UO.2
UU.9
(U8,0)
U3.6
(U7.8)
U7.7
Mean
(21)
38.2
(19)
35.8
(21)
36.1
(20)
39.U
(21)
U5.9
(21)
52.8
(21)
56.U
(19)
57.7
(20)
57. )4
(21)
53.5
(21)
U7.3
(22)
U2.6
U7.0
Readings at first high water and first low water after 7 a.m.
Source - USCFF
33
0
Monthly And Annual Mean Surface Water Temperatures, F
POLLOCK RII
' LIGHT5
;i!ip
hl°32«N
I. 69°55'W.
Year
Jan.
Feb.
Mar.
Apr.
May
June
July
Aug.
Sept.
Oct.
Nov.
Dec.
Ann.
1925
-
-
-
-
hh.6
51.3
56.6
60.h
57.2
50.8
h5.5
ho.5
-
1926
27
28
29
1930
37.0
38.2
ho. 6
hi. 2
hO.2
3h.h
37.3
38.2
33.6
37.5
3U.h
37 »3
37. h
36.8
37.h
39.5
ho. 2
ho. 2
39.5
hh.h
h3.7
hh.2
hh.7
h5.2
50.2
50.7
52.0
5h.o
52.5
55.8
57.3
55.9
57.3
59.5
59.1
57.1
63.0
57.2
58. h
56.1
58.5
59.3
57.1
60.5
53.7
52.8
5h.8
53.0
56.1
h8.U
h8.3
h9.6
h9.2
50.2
U2.8
h3.7
h5.6
U3.1
h5.h
U6.1
h7.1
hS.U
(h7.7)
hS.5
1931
32
33
3U
1935
hl.l
hl.O
38.3
36.8
38.2
ho.5
39.2
33.h
3h.9
38.h
35.8
3h.O
35.1
hl.h
hl.O
35.8
36.8
37.7
h5.1
h6.1
h2.1
h2.5
h3.9
53.7
52.3
50.9
52.1
50.6
53. h
58. h
55.9
58.0
58.2
6l.h
58.6
5U.8
53.1
61.7
60.0
57.9
5h.h
53.5
56. h
56.2
52.0
5h.3
50.5
51.0
51.0
h8.3
U7.3
h7.9
h5.7
h6.0
h3.2
h2.h
h2.6
39.8
h9.2
(h7.3)
h6.2
h5.2
h6.0
1936
37
38
39
19liO
37.5
39.8
38.3
38.5
36. h
37.6
37.9
37.7
3h.3
36.2
36.1
37.5
36.8
3h.6
38.7
39.7
ho. 2
39.h
36.7
hh.8
h5.h
h5.9
hh.9
h2.9
52.1
53.3
50.5
5h.0
52.h
59.3
62. h
55.6
56.5
57.8
57.3
60.3
58.7
57.7
59.3
55.9
52.0
56.5
59. h
58.3
51.3
h7.6
52.9
5h.h
h7.0
h2.8
h7.5
h7.h
h7.9
hl.5
hh.O
ho. 9
hi. 9
h2.8
h6.3
h6.3
h6.9
h7.h
(h6.h)
19hl 39.5 36.9 3h.6 38.6 h3.9 50.6 55.7 57.h 56.3 50.7 h6.7 h3.h h6.2
(15) (15) (Hi) (16)
Mean 39.0 37.1 36.1 38.9
(17) (17)
hh.h 52.0
(17)
57.6
(17)
58.6
(17)
57.0
(16) (17) (17)
52.6 h7.7 h2.9 h7.0
Readings at 8 a.m. and 6 p.m.
Source - USBF
3A
o
Uonthly and Annual Mean Surface Water Tonperatures, F
POT.TOCK RIP
LIGHTSHIP
0
41 32'N.
69 55'
W.
Year
Jan.
Feb.
Uar.
Apr.
Uay
June
July
Aug.
Sept.
Oct.
Nov.
Dec.
1948
49
1950
45.2
37.9
39.9
44.2
38.5
39.8
43.8
39.2
38.2
41.4
39.3
-
-
53.8
59.4
54.8
57.1
64.2
58.6
56.4
58.2
53.5
51.6
55.3
50.8
49.9
51.5
42.8
40.6
46.0
1951
52
53
54
1955
43.3
42.7
42.4
44.3
42.7
41.9
40.6
40.3
39.9
40.1
a.o
39.5
39.5
39.8
40.0
42.8
42.1
41.3
41.2
46.6
45.2
53.4
50.0
59.5
58.4
65.1
61.2
63.2
64.4
67.8
64.9
56.5
61J*
60.6
61.1
56.9
56.0
56.6
55.2
54.9
51.7
51.0
52.4
52.2
50.2
46.4
46.0
49.0
46.8
44.3
Ann.
1956 40.1 38.9 38.3 39.4 ----- _-__
(9) (9) (9) (7) (2) (2) (5) (8) (7) (8) (8) (8)
Mean 42.1 40.5 39.9 41.1 45.9 51.7 57.2 62.7 59.9 55.0 51.2 45.2 49.3
Readings at 0130, 0730, 1330 and 1930 EST
Source - NIfRC
35
0
Monthly and Annual Mean Surface 'Water Tempe ratures, F
GREAT RCXIND SHOAL IJGHTSHIP 41°24.3'N. 69°54.7'"'.
Year
Jan.
Feb.
Mar.
Apr.
May
June
July
AUfi.
Sept.
Oct.
Nov.
Dec.
Ann.
1891
.
60.4
54.3
46.4
43.2
92
39.7
36.3
34.9*
39.9 *
45.1
53.8
59.6
61.6
60.2
54.5
45.8
39.5
47.6
93
33.6
33.4
35.1
39.0
45.2
51.8
60.8
61.3
57.9
54.0
48.8
41.6
46.9
94
38.9
35.8
38.1
39.7
46.9
53.8
59.3
61.1
58.3
53.2
46.9
40.2
47.7
1895
36.8
33.8*
35.8
40.2
46.3
54.7
59.9
60.3
59.3
-
-
41.4
(47.5)
1896
37.5
36.0*
36.4
40.0
47.0
53.0
59.4
60.6
58.0
52.4
49.1
43.0
47.7
97
38.5
36.7
38.1
41.8
49.5
54.4
58.0
62.5
60.4
55.4
47.3* 42.7
48.8
98
38.5
37.2
38.8
40. 0»
45.5
53.3
58.9
62.2
59.0
54.7
-
-
(48.2)
99
37.2
34.2
35.8
39.0
46.9
55.3
56.3
60.2
60.2
52.8
48.9
43.6
47.5
1900
38.8*
36.6
36.1
40.4
47.4
54.8
59.8
61.2
-
-
50.3
47.4
(48.8)
1901
44.6
35.3
35.8
38.6
45.2
54.8
60.0
60.9
_
_
45.4
39.4 (47.8)
02
37.9
39.2
40.8
43.0
48.8
51.8
58.1
59.8
60.2
55.3
50.3
43.1
49.0
03
37.7
35.9
39.0*
41.7'*
46.8
50.5
58.4
-"
—
■"
~
"■
~
(12)
(12)
(12)
(12)
(12)
(12)
(12)
(11)
(10)
(9)
(10)
(n)
Uean
38.3
35.9
37.0
40.3
46.7
53.5
59.0
61.1
59.4
54.1
47.9
42.3
48.0
* Values less than 28° oirdtted.
Readings at first high water and first low water after 7 a.m.
Source - USCFF
36
Wonthly and Annual Mean Surface Water Temperatures, °F
NiNTUCKET, MASSACHUSETTS U^IV'N, 7o''o6'ff.
Year Jan. Feb. Mar. Apr. May June July Aug. Sept. Oct. Nov. Dec. AeS*
1886 --------- - 19.0 37.7 -
87 33.ii 35.^. 36.i 4-3.8 57.A 64.5 74.0 12.A 64.6 56.4 45.9 38.0 51.8
88 30.5 31.5 35.2 y^5.1 54.2 64.8 68.6 71.6 65.4 52.4 46.9 38.7 50.4
89 38.5 32.6 38.4 46.9 60.0 67.7 73.^7 72.9 68.8 56.1 49.2 42.5 53.9
1890 40.1 38.0 ------- ---.
(4) (4) (3) (3) (3) (3) (3) (3) (3) (3) (4) (4)
Mean 35.6 34.4 36.7 A5.3 57.2 65.7 72.1 72.3 66.3 55.0 47.8 39.2 52.3
Wharf, foot of Main Street,
Readings at 2 p.m. EST
Source - USCFF
37
Monthly and annual Mean Surface I'iater Temperatures, °F
CROSS RIP LIGHTSHIP 41°26.7'N. 70°17.4'W.
Year
Jan. Feb.
Mar.
ji-pr .
May
June
July
Auk.
Sept.
Oct.
Nov.
Dec.
Ann.
1878
69.6
69.9
68.0
60.0
48.0
39.4
79
31.5 30.8
33.8
39.8
51.9
61.9
67.7
68.7
65.6
60.5
48.3
42.0
50.2
1880
37.8 36.2
37.3
42.0
53.0
63.1
70.2
-
66.4
59.3
48.7
36.4 (51.6)
1881
31.4 30.9
36.1
39.9
51.2
—
—
—
_
_
_
—
—
82
34.0 33.6
34.2
37.4
-
-
-
69.0
67.4
60.6
49.8
38.3
(50.5)
83
32.5 31.5
32.0
38.6
51.1
62.2
69.4
69.4
65.0
56.3
47.7
38.9
49.6
84
32.3 34.0
34.5
39.2
49.3
59.0
66.1
68.1
66.1
58.8
48.2
40.6
49.7
1885
35.4 29.3
31.8
39.2
48.7
61.7
69.4
70.9
64.0
56.2
50.2
40.7
49.8
1886
33.6 32.5
32.8
42.8
52.5
61.2
67.6
68.3
67.2
58.9
50.2
40.0
50.6
87
33.4 33.5
34.4
39.1
52.1
60.8
69.2
70.6
64.9
56.8
47.3
40.5
50.2
88
30.5 29.8
32.9
40.5
49.5
60.0
-
68.2
65.3
55.0
-
-
(48.9)
89
38.1 33.8
35.3
42.4
55.0
62.8
68.5
69.8
66.9
56.2
50.0
43.9
51.9
1890
39.4 36.7
36.4
42.8
53.4
61.6
68.4
70.9
67.9
59.0
49.5
38.6
52.0
1891
33.6 35.2
36.3
4^.0
51.7
61.0
66.3
68.7
M
59.5
48.9
43.4
(51.5)
92
38.5 33.3
33.7
40.6
49.0
60.4
66.6
71.2
66.6
57.9
48.4
38.0
50.4
93
31.9 30.8
32.7
-
-
-
-
-
-
-
-
-
-
(15) (15) (15) (14) (13) (12) (12) (13) (13) (14) (13) (13)
Mean 34.3 32.8 34.3 40.6 51.4 61.3 o8j2 69.5 66.2 58.2 48.9 40.0 50.5
Readings at first high water and first low water after 7 a.m.
Source - USCFF
38
0
Monthly and Annual Mean Surface (later Temperatures, F
NANTUCKET NEW SOUTH SHOALS LIOTTSHIP AO°56«N. (^^2^M,
188A Moved to AO 55 69 A9
Year Jan. Feb. Mar. Apr. May June July Aug. Sent. Oct. Nov. Dec, inn.
1878 59.7 59.7 5k.U ^7.7 42.7 -
79 36.8 36.1 36.6 3?. 7 45.1 51.8 56.2 - - ....
1380 ----..--. -->-
56.3 49.8 ^3.7 (47.5)
49.3 41.4 (47.3)
55.0 49.4 42.5 48.1
49.3 43.9 (47.7)
55.9 51.2 43.4 47.7
57.0 51.0 43.8 48.7
56.4 48.6 44.1 48.0
52.6 49.1 42.4 (46.8)
54.6 - U.4 (48.1)
55.0 48.6 41.3 (48.5)
55.6 48.5 U.O 48.0
(10) (11) (12)
55*5 -19.3 43.1 47.8
Readings at first high water and first low water after 7 a.m.
Source - USCFF
1881
-
34.6
38.3
38.3
44.0
50.3
57.6
59.0
58.9
82
38.5
36.6
37.6
39.5
42.7
49.8
-
.
-
83
37.5
36.2
35.1
38.8
45.6
55.0
60.4
61.2
60.3
84
37.2
38.3
36.7
38.5
44.1
52.0
57.3
58.6
60.4
1885
40.0
34.3
34.4
38.8
43.4
52.0
53.3
60.4
59.9
1886
40.1
38.0
36.7
a. 5
45.9
52.0
58.0
59.6
60.9
87
38.8
38.1
37.1
39.0
45.0
51.4
58.3
59.5
59.6
88
-
35.5
36.4
38.2
.
-
55.6
58.5
58.0
89
40.7
37.1
38.3
40.4
U.l
52.6
57.5
58.9
59.6
1890
a. 6
39.2
38.6
40.9
46.0
51.8
-
60.7
60.3
1891
38.7
38.0
37.3
41.0
46.0
51.1
57.6
60.0
58.6
92
"
37.1
~
40.2
45.7
-
-
-
-
(10)
(13)
(12)
(13)
(12)
(11)
(10)
(U)
(11)
Mean
39.0
36.8
36.9
39.5
U.8
51.8
57.7
59.6
59.6
39
o
Monthly and Annual Mean Surface Water Temparaturea, F
NUNTUCKET SHOALS LIGHTSHIP ^0 ^6»N. 69 56' W.
Year Jan. Feb. Mar. ^pr. May June July tug. Sept. Oct. Nov. Dec. Inn.
1892 -- il2.1 -
93 3ii.3 3^.1 35.2 . - - 56.7 60.8 58.6 55.8 - - -
94 39.5 37.5 3S.3 40.1 45.7 50.7 56.3 60.3 61.2 56.7 49.5 -
1895 - - - 39.9 45.7 52.4 56.1 61.4 60.0 56.8 51.8 U.9 -
1896 40.1 37.0 34.4 39.8 46.2 51.8 56.4 60.2 59.2 - . - -
(3) (3) (3) (3) (3) (3) (4) (4) (4) (3) (2) (2)
Mean 38.0 36.2 36.0 39.9 45.9 51.6 56.4 60.7 59.8 56.4 50.6 43.5 47.9
Readings at First high water and first low water after 7 a.m.
Source - DSCFF
40
o
Monthly and Annual Mean Surface Water Temperatures, F
NUNTUCKET i
SHOALS LIGHTSHIP
40°
'37'N.
69°37'06''W.
Yeir
J?^n, _
Feb.
Mar.
\vr.
May
June
July
4ue.
Sect.
Oct.
Nov.
De5»
iSQ.
1896
52.8
97
a.3
_
39.3
41.9
45.3
50.0
65.4
63.1
61.5
56.5
51.6
47.3
(50.3)
98
a. 2
39.9
40.3
40.7
U.7
47.7
55.6
60.6
-
-
51.1
42.4
(48.4)
99
38.1
37.0
-
U.9
56.8
62.1
65.5
-
-
51.7
46.7
(49.8)
1900
39.6
38.9
40.8
U.8
51.3
57.9
64.7
61.6
-
-
-
(49.4)
1901
39.6
35.8
37.0
40.0
U.8
50.1
55.5
64.3
64.0
-
-
43.7
(48.3)
02
39.5
36.9
39.6
41.4
45.8
48.7
56.4
60.4
59.6
-
-
44.5
(48.4)
03
38.0
36.2
37.8
42.4
46.6
51.7
54.2
58.0
62.8
57.4
51.6
-
(48.4)
04
35.2
39.2
44.8
48.0
-
63.3
61.6
-
48.5
40.2
(47.7)
1905
-
35.7
38.8
-
53.6
55.6
-
56.3
52.2
48,4
-
(47.0)
1906
_
^
^
37.8
42.8
51.3
57.1
66.8
61.6
58.3
.
-
(43.3)
07
a. 6
38.2
37.6
40.2
42.5
49.2
.
>
-
-
50.3
42.7
(48.3)
08
39.3
36.4
38.4
40.5
46.3
55.2
-
-
60.7
61.8
50.9
-
(49.4)
09
39.9
36.7
_
37.3
42.0
48.7
54.6
59.0
56.2
54.4
49.1
42.1
(46.3)
1910
37.2
37.3
44.1
49.2
59.2
67.3
62.4
-
-
-
(48.9)
1911
^
39.8
37.9
40.1
47.4
53.3
58.2
59.3
57.0
55.6
52.2
45.0
(48.8)
12
38.2
35.4
36.1
39.4
43.7
51.8
57.1
~
•
•
"
42.5
(47.8)
(10)
(12)
37.3
(13)
(U)
(15)
44.5
(16)
(13)
(12)
(12)
(7)
(11)
(10)
Mean
39.7
37.9
40.1
51.1
57.6
62.7
60.4
56.6
50.3
43.8
48.5
Readings at first high water and first low water after 7 a.m.
Source - OSCFF
41
Monthly aod Annual Mean Surface Water Tempera tuea, F
NANTUCKET
SHOALS
LIGHTSHIP
t
0
iO 371N.
69°37' 06«W
•
^9flr
Jan.
Feb.
Mar.
Acr.
Mav
July
Sect.
Oct.
Nov.
D«fl,
Ann.
1923
24
1925
a. 5
40.5
38.3
39.4
38.1
39.2
40.3
42.8
43.3
46.6
49.8
51.5
55.4
59.6
58.5
60.3
56.6
53.8
50.5
51.4
50.9
47.8
U.2
U.4
48.1
(49.2)
1926
27
28
29
1930
40.4
39.6
39.5
39.5
35.7
37.3
36.5
38.5
36.8
35.3
38.6
35.5
37.3
35.9
37.6
39.7
37.8
38.9
38.8
42.8
42.7
43.3
43.8
47.7
49.1
52,2
53.3
57.1
57.3
53.8
58.7
61.5
58.5
61.2
59.1
56.4
57.6
59.2
62.6
54.8
54.9
54.9
53.4
53.9
51.9
51.6
49.8
49.0
51.3
44.3
46.4
45.0
43.8
46.0
(48.0)
47.6
47.3
(47.6)
48.5
1931
32
33
34
1935
42.0
43.8
39.7
40.0
40.0
40.2
34.4
38.4
41.5
38.6
35.7
38.4
43.6
41.0
39.8
40.6
46.1
47.3
44.6
52,7
53.9
54.2
53,4
52.2
60.0
59.8
56.6
59.7
58.6
64.2
68.1
61.3
63.1
63.5
60.7
63.8
62.7
67.1
61.7
56,4
58.5
57,7
56.8
55.7
53.7
52.8
51.1
52.1
52.6
47.6 50.7
47.6 (51.0)
43.6 (49.4)
46.2 (49.4)
44.9 49.3
1936
37
38
39
1940
39.9
45.0
42.4
43.5
39.1
36.4
a. 9
41.0
42.6
37.9
39.2
39.0
39.4
41.4
42.3
40.3
42.4
42.5
37.1
48.0
45.7
44.1
46.2
43.2
52.8
50.6
53.4
51.5
48.9
57.2
57.7
60.8
60.5
54.5
61.7
68.6
65.7
66.0
62.1
59.0
64.2
63.1
61.2
58.6
56.5
57.5
56.7
56.2
55.0
51.4
54.2
55.6
51.2
50.7
46.5
45.9
48.7
45.1
45.4
49.2
50.9
51.1
50.6
47.5
19a
40.8
36.3
36.4
39.7
U.6
50.4
56.5
60.1
59.1
53.5
51.5
47.1
48.0
Mean
(16)
41.1
(17)
38.4
(16)
38.0
(17)
40.3
(15)
44.6
(17)
51.6
(15)
57.7
(16)
62.7
(18)
60.3
(18)
55.7
(19)
51.8
(19)
45.8
49.0
Readings at 8 a.m. and 8 p.m.
Source - USBF
42
Monthly and Annual Mean Surface VJater Temperatures, °F
NANTUCKET LIGHTSHIP UO 37'N. 69 38'18"W.
Year Jan. Feb. Mar. Apr. May June July Aug. Sept. Oct. Nov. Dec. Ann,
19li7 _..--.--- 60.3 52.9 -
kQ - UO.7 Uo.O U2.5 U6.1 50.8 56.14 63. U 61.0 56.6 - - (50.3)
k9 - Ul.l^ UO.2 - U6.7 60.3 67.6 68.6 65.6 61.1 - 5l.O (53.6)
1950 _ - - U3.7 h7.2 57.0 60.8 63. U - . - - -
1951 H3.3 I42.8 U2.8 UU.8 U7.7 52.8 61.2 65.6 65.9 59.i; 55.0 U8.0 52.U
52 - - - hh.h U5.5 53.2 61.I 67.8 63. 0 59.0 53.0 U8.0 (51.7)
(1) (3) (3) (U) (5) (5) (5) (5) (h) (5) (3) (3)
Mean U3.3 U.6 Ul.O 1*3.8 U6.6 5U.8 6l.li 65.8 63.9 59.3 53.6 U9.0 52.0
Readings at 0130, 0700, 1330 and 1930, EST
Source - NWRC
43
o
Monthly and Ann'oal Mean Surface Water Temperatures, F
NANTUCKET LIGHTSHIP lO 37«00"N. 69°l8«30"W.
Year Jan. Feb. Mar, Apr. May June July Aug. Sept. Oct. Nov. Dec. Ann.
1953 - - - U3.9 U6.7 ?2.U 58.8 57.6 59.3 5U.h 51. h -
51i - - 38.1 U3.8 U7.8 - - 60.0 - - . . _
1955 U2.0 U2.2 U2.U Ul.7 ----- __--
(1) (1) (2) (3) (2) (1) (1) (2) (1) (1) (1)
Mean li2.0 li2.2 UO.lj h3.1 U7.2 52. U 58.8 58.8 59.3 Sh.h 5l.li -
Readings at 0130, 0730, 1330 and 1930, EST
Source - NTOC
u
o
Monthly and Annual Uean Surface Water Tanperatures, F
WOODS
1 HOLE,
MASSACHUSETTS
o
41 31'N.
o
70 40 'W.
Year
Jan.
Feb.
Mar.
Apr.
May
June
July
Aui;.
Sept.
Oct.
Nov.
Dec.
Ann.
1880
37.6
35.3
37.9
43.7
57.8
66.5
72.5
71.6
68.5
57.9
46.0
-
-
1881
82
83
84
1885
34.5
30.7
32.4
34.6
30.9
33.1
31.2
34.5
29.8
36.6
37.5
32.3
35.3
31.8
41.0
43.3
41.5
42.8
40.3
53.8
49.8
52.5
55.1
50.1
61.6
64.9
61.3
71.3
71.4
69.9
71.8
65.1
65.8
59.0
55.9
58.6
50.5
48.0
47.7
45.8
51.4
37.1
a. 5
39.7
50.0
50.6
1886
87
88
89
1890
32.2
32.6
31.1
36.6
40.2
30.9
33.2
30.4
32.2
36.4
32.2
34.6
33.1
34.7
36.4
42.6
40.0
41.0
42.7
55.7
52.6
50.2
55.7
53.3
62.5
62.0
62.7
65.4
62.0
68.7
70.6
66.6
68.7
69.4
69.1
72.0
68.9
70.7
71.1
68.1
66.5
64.3
67.2
68.0
60.3
58.9
54.3
57.0
59.0
51.0
48.2
48.6
49.8
48.0
38.0 50.9
40.3 51.0
39.1 49.2
44.4 52.1
36.7 (52.0)
1891
92
93
94
1895
33.1
36.8
29.6
35.0
34.0
34.8
31.9
29.8
32.7
29.6
35.7
33.3
30.7
37.6
44.3
42.5
40.9
42.7
42.0
52.3
51.1
51.0
53.6
53.4
61.1
62.1
61.2
62.0
63.4
66.9
69.9
69.6
70.4
68.6
71.8
73.3
69.4
69.9
69.1
67.1
67.5
67,2
67.6
57.6
58.8
60.4
59.6
59.5
47.4
50.6
52.4
48.1
49.5
42.0
37.3
40.8
39.2
39.7
51.1
51.1
50.6
51.5
51.1
1896
97
98
99
1900
32.9
32.0
36.1
33.4
34.6
31.7
31.6
34.0
30.8
31.2
32.4
35.4
39.0
34.5
33.8
40.7
43.0
43.7
41.6
40.9
53.3
49.7
49.7
51.9
52.6
63.4
60.0
60.5
63.2
61.7
65.7
69.6
68.1
69.6
68.6
70.9
70.3
70.8
69.4
70.9
66.7
67.6
68.2
66.0
68.8
58.3
59.4
59.6
57.8
60.1
53.1
49.9
49.9
49.4
50.7
41.2
41.9
37.1
a. 8
39.8
50.9
50.9
51.4
50.8
51.1
1901
02
03
04
1905
33.2
31.5
32.6
29.3
30.7
29.6
29.0
32.0
29.0
29.0
33.4
36.2
39.1
33.1
32.6
41.2
45.7
45.7
40.8
42.4
51.9
54.0
54.5
53.3
52.0
61.2
62.0
61.0
62.2
61.5
69.6
66.3
67.6
69.4
70.3
69.9
69.1
68.0
65.8
69.9
68.7
67.3
66.6
67.0
66.3
62.2
60.6
57.3
57.7
59.4
47.8
52.0
47.8
46.5
48.1
36.8
38.8
36.5
34.4
39.8
50.5
51.0
50.7
49.0
50.2
1906
33.0
34.4
35.0
42.2
53.2
62.8
68.9
70.9
68.1
60.0
48.4
36.2
51.1
07
08
35.7
30.4
35.9
41.3
52.4
61.9
71.0
69.3
62.7
57.2
46.6
40.2
50.4
09
1910
31.5
32.0
37.8
46.9
55.2
62.6
70.4
71.0
66.9
60.4
48.0
36.6
51.6
1880 - May 1834, incl., 1893-1897, incl, one reading per day at no specified time.
Nov. 1884 - 1892, incl., 1898-1919, incl., readings at first high water and first
low water after 7 a.m.
Source - USCFF
45
WOODS
> HOLE,
MASS.
(Continued)
Year
Jan.
Feb.
Mar.
Apr.
May
June
July
Au*.
Sept.
Oct.
Nov.
Dec.
Ann.
1911
34.6
31.3
33.7
41.3
52.9
62.5
71.0
71.1
66.3
57.8
49.0
41.5
51.1
12
31.6
30.1
34.0
42.3
51.8
65.0
69.4
6$. 5
66.9
60.1
51.5
41.5
51.1
13
39.2
34.1
38.1
45.5
52.9
62.0
69.6
71.6
66.8
60.2
51.2
42.6
52.8
U
33.9
31.1
32.0
42.0
51.8
62.4
66.4
68.6
67.2
60.5
49.1
39.1
50.3
1915
34.4
35.0
36.0
41.8
52.8
60.3
68.0
69.4
67.0
55.3
48.1
38.0
50.5
1916
32.8
31.7
31.0
39.9
49.8
59.0
67.0
68.3
65.7
59.9
50.4
40.1
49.6
17
34.1
30.6
34.6
41.1
48.4
59.7
68.0
71.3
66.6
57.9
47.0
34.8
49.5
18
29.9
30.6
33.0
41.1
54.3
62.3
68.2
71.0
66.7
58.8
51.9
41.3
50.8
19
1920
1921
22
23
24
1925
1926
27
36.4
34.8
38.7
-
-
-
-
-
-
-
-
-
-
32.0
32.6
35.6
42.7
51.0
59.1
66.0
67.8
64.3
59.3
51.4
41.3
50.3
28
35.0
31.3
33.9
42.2
49.9
60.4
67.9
69.8
66.5
58.8
49.2
40.9
50.5
29
1930
34.9
32.3
35.7
43.1
52.0
62.1
68.2
68.0
65.4
54.5
49.2
35.9
50.1
1931
32
39.4
35.8
-
43.5
53.1
62.1
69.1
72.2
67.6
60.5
50.5
41.0
(52.5)
33
39.3
35.7
36.0
43.2
53.9
63.2
67.3
70.2
67.7
60.6
47.3
37.8
51.8
3^
32.7
29.8
32.5
42.9
52.8
62.4
69.9
69.9
67.8
58.4
47.9
38.9
50.5
1935
30.8
28.6
33.6
39.9
49.8
59.6
67.3
68.3
63.5
56.3
50.1
36.2
48.7
1936
31.2
29.5
37.5
45.2
55.1
63.0
68.2
70.6
67.2
60.5
49.4
39.7
51.4
37
39.8
37.4
37.7
43.4
52.9
62.5
68.2
72.1
66.5
56.6
49.1
40.7
52.2
38
35.9
35.9
37.7
45.0
51.9
60.5
66.9
70.1
64.5
57.2
50.9
39.6
51.3
39
33.3
31.4
34.1
40.6
48.9
59.8
66.0
70.6
65.2
57.4
44.8
36.8
49.1
1940
29.6
29.9
33.4
40.3
51.1
59.1
65.7
67.9
66.4
56.9
47.9
39.2
49.0
1941
42
33.6
30.5
32.3
41.9
52.5
61.1
68.2
69.6
67.0
60.2
51.2
41.8
50.8
43
44
"•
—
35.4
42.1
59.2
63.1
70.0
71.8
68.2
59.2
48.0
38.1 (51.8)
1945
32.4
30.6
37.9
48.0
54.5
62.4
70.7
70.7
68.5
59.0
50.5
37.6
51.9
1946
32.9
31.9
39.0
45.3
53.1
61.9
68.4
68.5
66.2
61.2
53.6
42.8
52.1
47
35.8
34.0
36.1
43.5
50.7
61.2
71.8
72.5
69.6
61.0
49.5
38.8
52.0
48
31.1
30.2
35.8
44.6
52.3
60.6
69.5
71.3
68.0
58.3
53.1
43.8
51.6
49
38.6
36.7
-
48.5
55.4
65.4
71.7
72.5
67.9
61.5
52.0
41.9
(54.0)
1950
39.6
36.2
34.0
42.3
50.2
62.0
69.7
71.0
66.3
59.5
53.0
43.0
52.2
1927-1941, readings at 8 a.m., 12 m. and L, p.m. Source - USBF
A6
WOODS
HOLE,
MASS.
(Continued)
Year
Jan.
Feb.
liar.
Apr.
May
June
July
Aug.
Sept.
Oct.
Nov.
Dec.
Ann,
1951
37.0
34.9
38.4
46.7
56.0
63.0
70.6
71.7
70.2
61.4
50.4
41.3
53.5
52
36.1
35.0
36.4
45.2
54.0
65.0
71.9
73.0
68.3
59.4
49.6
42.1
53.0
53
37.1
36.5
38.7
45.6
53.7
63.5
70.1
70.1
69.0
60.3
52.6
46.0
53.6
54
35.8
34.4
38.5
45.4
52.6
63.6
69.8
69.8
65.1
61.5
51.4
40.8
52.1
1955
35.5
32.4
37.3
43.3
53.1
62.2
71.9
73.2
67.6
60.4
50.6
36.8
52.0
1956 32.3 33.8 35.3 41.6 49.8 60.9 68.0 70.1 66.5 58.6 51.7 43.8 51.0
(62)
(63)
(61)
(62)
(63) (61)
(58)
(60)
(60)
(61) (63) (60)
34.1
32.3
35.3
42.9
52.6 62.0
69.0
70.3
67.0
58.9 49.5 39.7
Mean 34.1 32.3 35.3 42.9 52.6 62.0 69.0 70.3 67.0 58.9 49.5 39.7 51.1
19^4-1956, one reading per day, usually near noon.
Source - D3C&GS
Ul
o
Monthly and Annual Mean Surface V/ater Temperatures, F
VINEYARD SOUND LIGHTSHIP
0
Ul 23'
02 "N.
0
70 59'01"W,
Year
Jan.
Feb.
Mar.
Apr.
May
June
July
Aug.
Sept.
Oct.
Nov.
Dec.
Ann.
1878
_
_
63.6
65-2
6I4.6
59.8
50.5
I42.8
^^
79
35.5
33.2
3li.h
39.5
-
57.6
63. U
6U.8
63.3
60.1
I49.2
U3.6
(i49.l4)
1880
-
-
-
-
65.9
-
6I4.5
60.1
U9.5
38.9
-
1881
32.2
31.0
3U.9
37.9
U8.1
56.0
62.7
65.1
63.8
60.0
52.8
_
(U8.9)
82
.
36.7
UO.6
U7.5
55.9
63. h
66.5
63.7
58.8
50.2
I4O.5
(U9.14)
83
33.2
32.0
32.6
38.6
U7.U
60.3
66.I4
65.ti
62.0
5U.2
_
-
(U8.7)
8U
30.6
3U.5
3li.0
39.1)
U7.5
55.2
60.6
63.9
63.2
57.6
U9.5
I42.2
U8.2
1885
36.ii
31.2
31.7
37.6
U7.2
56.0
6U.6
66.h
60.U
56.0
51.2
Ul.8
U8.I4
1886
3U.6
30.3
33.2
lil.O
50.2
56.8
62.h
63. h
61.8
59.7
51.6
U2.2
I48.9
87
35.6
35.5
35.3
39.1
U8.7
57.2
65.6
66.7
63.6
58.9
50.5
I4I4.3
50.1
88
35.9
32.5
33.0
39.0
U7.3
55.14
61.1
63.8
62 .I4
55.0
50.2
I42.2
U3.2
89
Uo.l
35.8
36.3
UO.8
h9.9
57.3
62.8
65.5
63.8
56.5
51.7
U5.0
50.U
1890
a.5
38.8
37.8
U2.6
50.1
58.1
63.3
65.2
63.9
58.0
U9.5
39.6
50.7
1891
3U.li
35.1
36.0
1;2.U
U9.9
56.6
61.2
65.5
6U.9
58.1J
I49.2
U3.7
U9.8
92
39.3
33.7
33.U
39.3
li7.U
57.2
63.3
66.7
6U.3
57.2
50.1
I4O.9
U9.1*
93
31.9
31.0
31.6
38.1
U6.3
57.3
61.9
65.14
62.5
57.8
51.8
U2.3
148.2
9h
37.5
33.3
35.3
38.9
!:8.5
56.2
63.1
6U.2
62.9
58.7
50.5
I42.2
U9.3
1895
36.1
31.2
32.7
38.3
U6.0
57.0
61.9
6U.2
62. U
55.8
U9.2
I4O.9
U8.0
1896
3U.7
32.0
32.3
37.2
h7.6
56.0
61.5
_
^
5I4.8
50.2
lil.l
(I48.O)
97
30.U
32.7
38.6
h7.1
5li.5
62.8
6U.3
61.5
56.3
U9.6
42.3
(I48.O)
98
_
32.3
35.3
39.7
U5.7
53.3
61.3
65.2
63.6
58.8
52.1
ai.7
(I48.8)
99
37.3
33.1
35.1
ljO.3
U8.0
58.3
-
_
63 .I4
58.6
52.I4
-
(U9.7)
1900
-
35.6
3U.U
liO.l
us.a
56.2
63.7
66.5
65.8
60.9
53.8
l4i4.6
(50.5)
1901
38.2
35.5
33.9
liO.a
„
55.2
63.0
65.2
614.1
59.2
50.0
I4I.I
I49.5
02
35.2
33.1
36.0
li2.7
50.5
56.6
61.5
63.9
63.5
59.3
53.0
li2.7
I49.8
03
36.5
3U.7
38.1
_
52.9
56.2
61.8
62.7
61.5
59.0
51.6
li2.9
U9.8
OU
33.7
30.9
31.9
37.6
U8.7
57.0
63.7
6I4.6
61.6
57.6
I49.I4
38.8
I48.O
1905
33.8
30.3
33.2
38.9
U7.5
56.8
63.0
614.3
61.6
57.3
50.0
liO.h
U8.1
1906
38.5
^
^
Ul.3
U8.0
57.0
6U.7
6I4.O
62.0
58.9
U8.9
39.3
(U9.3)
07
36.1
30.1
32.2
37.0
U2.7
51.0
59.9
63.2
6I.I4
55.6
I48.9
U2.1
I46.7
08
38.6
33.9
»
_
_
57.8
6li.6
66.2
61.9
58.3
_
-
(l4?.7)
09
37.3
35.5
36.7
Ul.5
U9.7
56.2
61.8
65.0
62.I4
58.2
50.3
39.9
I49.6
1910
36.0
3U.2
36.2
U3.6
51.5
58.3
63.3
65.9
-
-
-
-
-
(27)
(29)
(29)
(29)
(20)
(31)
(32)
(30)
(31)
(32)
(30)
(28)
Mean
36.0
33.1
3l4.'a
39.7
h8.2
56.5
62.9
65.0
63.0
58.0
50.6
I4I.8
I49.I
Sow & Pigs Reef
Readings at first high water and first low water after 7 a.m.
Source - USCFF
48
o
Monthly and Annual Mean Surface Water Temperatures, F
NEV;PORr, RHODE ISLAND Ul 29«N. 71 19»W.
Year Jan. Feb. Mar. Apr. May June July Aug. Sept. Oct. Nov. Dec. Ann.
1881 - - - - 52.1 60.U 67.7 68.3 66.7 60.3 5l.U U3.9 -
82 37.2 36.5 39.9 - U9.2 - 68.3 70. U 66.0 59.9 h9,U 38.U -
83 33.8 33.8 35.6 _---
(2) (2) (2) (0) (2) (1) (2) (2) (2) (2) (2) (2)
Mean 35.5 35.2 37.8 - 50.6 60.1i 68.0 69.U 66.U 60.1 50.U Ul.2 -
South side of Commercial Wharf, inner harbor.
Readings at 2 p.m. ffashington time.
Source - USCFF
U3
Monthly and Annual Meam Surface Water Temperatures, F
BRENTON'S
RKEF
41°25 .6
•N. 71°22.6
'W.
Tear
Jan .
Feb.
Mar.
Apr.
May June
July
Auk.
Sept.
Oct.
Nov.
Dec.
Ann.
1878
66.1
66.5
66.2
60.4
50.6
43.1
.
79
36.3
34.4
35.1
40.0
51.0 59.0
66.5
67.3
64.9
61.7
50.3
43.9
50.9
1880
40.5
39.0
40.9
43.4
52.1 62.0
68.2
68.0
65.7
60.5
51.7
41.5
52.8
1881
34.5
33.6
35.9
39.9
50.1 58.0
65.3
66.3
65.7
61.1
53.9
46.3
50.9
82
40.5
38.1
39.3
42.0
47.8 57.6
64.6
68.3
65.9
60.5
52.1
42.0
51.6
83
36.2
34.2
35.8
41.1
49.4 61.0
67.1
66.6
63.7
57.2
50.7
42.7
50.5
84
35.5
35.3
35.7
40.6
49.3 57.2
61.5
65.3
64.5
58.7
49.9
43.5
49.8
1885
39.0
34.3
34.7
39.7
49.2 57.7
66.6
68.5
63.2
58.6
52.8
43.9
50.7
1886
36.6
33.9
^
42.2
51.4 59.1
64.1
64.9
65.4
59.8
52.7
42.9
(50.8)
87
35.1
35.1
36.4
40.1
50.7 59.5
67.6
68.1
63.7
59.1
50.9
44.3
50.9
88
37.5
34.1
34.0
38.6
48.4 58.7
63.1
65.0
63.1
54.9
50.1
43.8
49.3
89
u.o
37.9
37.7
41.7
52.8 60.2
65.9
66.9
65.7
57.4
51.5
46.0
52.1
1890
43.6
40.7
38.9
42.5
51.2 57.8
65.1
66.6
65.6
-
51.5
42.5
(52.0)
1891
37.4
37.8
38.2
45.1
48.9 59.0
64.3
67.3
66.3
58.5
49.7
44.9
51.3
92
39.9
36.5
35.1
42.0
49.4 59.0
65.8
67.8
65.1
57.5
49.7
41.5
50.8
93
33.6
-
35.2
40.7
49.9 60.4
64.5
68.1
64.1
59.0
51.3
42.4
(50.8)
94
39.4
-
38.9
42.2
51.6 58.4
65.8
66.3
64.8
59.5
50.6
-
(51.1)
1895
36.7
-
36.3
41.8
50.1 61.9
65.7
67.3
64.8
57.1
50.9
43.3
(50.9)
1896
38.2
36.3
35.9
41.4
49.9 60.0
64.7
67.5
63.7
57.2
52.6
42.3
50.8
97
37.6
35.7
37.7
42.6
50.8 58.0
66.8
68.0
65.0
58.8
52.6
45.4
51.6
98
40.6
36.2
38.2
41.8
49.3 57.5
65.3
67.4
64.5
58.2
49.3
41.2
50.8
99
37.1
33.6
35.5
41.9
49.4 60.3
65.5
67.7
64.8
57.8
51.9
45.0
50.9
1900
38.2
35.8
35.5
40.9
48.8 58.3
63.4
67.2
65.7
59.6
51.6
42.7
50.6
1901
36.7
31.3
33.8
38.7
47.8 55.4
63.3
64.9
61.4
53.9
44.1
36.5
47.3
02
32.6
30.5
32.6
38.2
46.5 52.8
58.0
62.4
64.1
59.7
52.4
42.2
47.7
03
37.7
35.9
39.7
44.2
52.7 57.5
61.8
63.6
63.4
54.5
45.8
40.4
49.8
04
34.7
31.9
33.3
38.8
51.3 59.0
65.5
66.2
64.2
57.6
48.9
39.7
49.3
1905
35.4
32.4
34.7
40.2
47.5 58.2
64.8
66.0
62.0
56.7
47.1
40.5
48.8
1906
36.4
34.6
34.5
43.1
50.4 59.2
64.5
66.6
63.8
59.1
52.0
42.2
50.5
07
36.8
33.4
43.3
38.0
45.0 53.7
62.9
64.1
61.8
55.7
50.1
43.8
48.3
08
40.8
35.3
36.8
41.6
49.9 60.4
66.5
67.3
63.8
60.6
52.9
45.1
51.8
09
38.1
36.8
37.8
42.8
50.5 58.4
63.7
66.5
64.0
59.5
51.5
42.1
51.0
1910
35.6
34.2
36.0
44.3
52.4 58.4
66.0
67.2
65.4
60.6
52.0
41.3
51.1
1911
37.3
34.9
35.8
39.9
48.1 59.2
66.4
67.5
64.8
58.6
52.5
45.9
50.9
12
37.4
34.8
35.6
40.1
49.2 58.0
64.3
65.9
64.1
59.2
53.6
46.0
50.7
13
42.5
39.8
39.0
44.2
51.0 59.1
65.1
67.5
64.4
60.4
53.7
46.8
52.8
14
38.7
34.7
34.7
47.3
49.5 57.6
63.1
65.4
63.3
59.1
51.9
42.7
50.7
1915
37.2
36.0
37.7
42.6
50.1 58.6
64.5
66.4
65.1
57.5
52.1
43.4
50.9
Through 12 May, 1925 readings made at 1st high water and first low water.
From 13 May, 1925, " " " 8 a.m. and 6 pn.
50
Brenton's Reef, Continued
Year Jan. Feb. Mar. Apr. May June July Aufi . Sept. Oct. Nov. Dec. Ann.
1916
38.3
36.0
33.9
37.8
46.2 56.5
62.5
64.8
62.4
57.2
51.2
42.7
49.1
17
37.6
33.7
34.5
39.1
44.2
55.2
62.4
66.6
61.6
55.7
48.7
39.1
48.2
18
30.7
29.7
32.3
38.3
48.8
57.3
62.7
65.5
63.3
56.0
51.7
43.6
48.3
19
39.1
38.1
37.5
40.8
46.5
54.0
58.6
61.1
59.7
59.6
51.1
43.6
49.1
1920
36.1
31.0
33.8
39.4
46.8
56.3
61.7
65.7
62.6
56.4
47.9
41.4
48.2
1921
36.8
37.2
39.6
46.1
52.2
57.6
62.3
63.2
61.9
56.4
51.0
43.1
50.6
22
38.0
34.7
34.9
41.0
49.0 59.6
66.5
65.7
65.6
58.8
49.9
41.6
50.4
23
35.5
33.6
33.3
38.7
47.2
56.2
64.2
63.4
62.5
55.4
49.2
44.8
48.7
24
38.8
34.7
34.8
39.3
47.2
53.8
59.1
63.3
63.6
59.0
52.0
43.7
49.1
1925
37.4
35.7
38.5
42.9
49.8
58.8
64.6
64.9
63.7
57.0
49.2
43.0
50.4
1926
38.0
34.3
35.1
39.2
47.1
54.5
62.4
65.2
63.0
58.6
51.8
43.1
49.4
27
38.3
37.1
36.9
41.5
49.4
58.4
64.4
65.8
63.2
60.3
55.2
47.8
51.5
28
42.8
38.7
38.7
42.2
/.8.8
57.4
61.8
64.7
64.4
58.9
52.3
45.5
51.4
29
39.4
36.5
38.3
43.2
47.9
59.4
63.6
66.2
66.3
59.6
54.3
45.1
51.6
1930
41.5
39.4
41.4
46.0
53.4
60.5
66.9
67.9
67.5
61.3
53.1
46.6
53.8
1931
40.7
37.6
38.5
44.9
52.9
61.7
68.3
69.5
66.8
61.7
54.8
48.6
53.8
32
44.3
42.7
41.7
44.6
52.2
59.8
65.9
69.7
65.2
61.0
54.7
57.6
54.1
33
43.7
40.6
40.2
43.5
50.2
60.8
65.2
68.3
66.1
60.6
51.9
44.3
53.0
34
39.3
35.3
36.0
42.2
48.7
59.8
67.1
67.7
67.7
61.2
54.0
46.2
52.1
1935
40.0
37.0
38.7
43.1
50.0
59.9
67.7
68.$
65.3
60.8
55.7
46.0
52.8
1936
38.5
33.3
_
_
.
.
65.3
67.6
65.6
60.5
52.5
43.6
(51.1)
37
42.7
40.0
39.5
43.3
51.3 61.7
66.7
69.4
-
57.4
52.7
45.6
(52.9)
38
39.7
38.3
38.7
43.5
51.5
60.1
-
-
64.3
59.2
53.7
45.0
(52.1)
39
39.0
36.4
37.4
42.2
48.7
-
-
70.9
65.0
60.4
50.9
43.7 (51.5)
1940
36.6
34.3
34.2
39.7
49.2
57.9
63.9
66.5
61.6
55.2
48.6
41.7
49.1
1941
36.2
32.6
33.6
40.3
47.9 56.3
64.3
64.8
61.7
57.0
49.7
41.2
48.8
42
32.5
-
-
-
50.4
61.5
65.2
66.2
64.6
59.7
-
39.6
(50.4)
43
37.5
~
~
~
—
—
~
~
""
~
^
^
^
Mean
1878
1943
(64)
(60)
(61)
(62)
(63)
(62)
(63)
(64)
(64)
(64)
(64)
(64)
38.1
35.6
36.5
41.6
49.5
58.4
64.6
66.5
64.3
58.6
51.4
43.5
50.7
Source - U3CFF, USBF, USFIBB
51
Monthly And Annual Mean Surface V/ater Temperatures, F
NEl^^
LONDON J
, CONTffiCTICUT
0
41 21'12"N.
0
72 05
'31"W.
Year
Jan.
Feb.
Mar.
Apr.
May
June
July
Aug.
Sept.
Oct.
Nov.
Dec.
Ann.
1873
7U
1375
3li.6
32.6
-
h2.5
56.);
65.5
-
68.);
70.1;
67.3
59.0
50. b
10.7
-
1876
77
78
79
1880
35.6
3l*.3
39.5
35.8
33.9
38.2
39.1
U2.1
38.3
Ul.2
U6.U
50.1
li5.6
U8.0
55.2
58.0
59.3
66. I4
65.2
66.0
67.1;
70.1;
72.1;
71.3
73.1
71;. 0
71.6
70.3
71.7
68.5
69.3
67.0
68.1
59.3
61.1
62.6
60.9
1;9.0
U9.3
U9.1;
1;9.1
12.1
hO.O
i;2.2
39.0
(53.U)
51;. 2
(53.1)
5U.7
1381
82
83
8U
1385
3U.3
38.1;
35.1
35.0
36.3
33.6
35.9
35.0
36.0
33.2
39.0
37.U
33.7
35.6
U2.2
U6.2
li7.1
1;6.6
U7.0
56.9
53.8
55.0
56.3
5li.9
61;. 5
68.3
63.1
6U.U
72.5
71.2
70.3
70.2
70.8
72.2
72.2
70.6
71.9
71.U
69.1
68.5
66.5
65.6
60.7
60.6
58.!;
60.3
51.7
50.U
51.2
1;9.6
uu.u
39.3
i;1.3
53.);
(53.U)
53.0
(52.7)
(52.6)
1336
87
3U.9
33.)i
35.1
36.9
37.1
U9.9
U5.2
55.9
59.3
63. U
66.2
70.6
71;. 9
70.5
72.9
68.6
66.1
60.0
59.1
51.2
U8.8
33.3
U3.2
52.3
(53.7)
Mean
(10)
35.8
(11)
3li.8
(10)
38.5
(12)
U6.J4
(11)
56.6
(11)
65.9
(11)
71.6
(13)
71.1;
(11)
67.7
(11)
60.2
(11)
50.0
(10)
hl.l
53.3
Custom House Wliarf, 150 feet from shore.
March '77 " " 300 " " "
Readings at 2 p.m. 75th meridian time.
Source - USCFF
52
Monthly and Annual Mean Surface Water Temperatures, °F
BARTLETTS
REEF
410K
i.3'N.
72^0
7.8'W.
Year
Jan.
Feb.
Mar.
Apr.
May
June
July
Aug.
Sept.
Oct.
Nov.
Dec.
Ann.
1878
65.8
66.4
61.7
49.7
42.0
79
33.4
32.1
33.4
36.9
46.1
54.5
-
-
-
-
-
-
-
1880
-
-
-
-
48.8 58.1
65.1
66.5
65.8
60.8
52.4
41.7
(50.6)
1881
33.7
30.5
33.5
37.5
46.4
54.9
62.2
65.1
64.8
60.5
53.0
45.3
49.0
82
38.4
35.3
37.1
39.9
45.7
54.6
61.8
65.8
65.0
59.8
51.1
40.2
49.6
83
34.0
31.8
32.5
38.2
46.3 55.8
64.1
65.0
63.3
57.8
50.5
a.4
48.4
84
33.8
33.5
34.0
39.2
46.8
55.8
62.0
64.7
65.6
59.8
50.5
43.0
49.0
1885
36.9
31.8
31.7
37.6
45.1
55.9
63.2
67.8
65.5
60.0
54.0
44.7
49.5
1886
37.3
34.3
34.8
41.1
49.0 56.9
63.0
65.3
66.2
61.5
53.7
43.7
50.6
87
36.4
35.5
36.1
39.8
48.1 56.8
65.0
68.2
65.2
60.5
52.0
45.2
50.7
88
37.7
33.4
33.7
38.0
45.4
55.5
61.5
64.5
63.4
57.2
51.4
43.9
48.8
89
41.3
38.0
38.5
41.6
49.2
57.6
64.0
65.9
65.8
58.3
52.6
46.8
51.6
1890
43.8
40.6
39.3
43.2
50.0
57.4
64.4
66.6
65.3
59.8
51.6
42.7
52.0
1891
37.0
37.0
37.9
42.4
47.9
55.9
62.3
66.2
66.2
60.5
51.5
45.7
50.9
92
40.7
37.0
35.5
40.3
47.3 56.4
63.1
67.0
66.2
59.0
51.2
42.9
50.6
93
33.7
31.9
33.6
39.0
46.2
55.2
63.2
65.3
64.5
60.2
53.1
44.1
49.2
94
39.7
36.3
37.5
41.2
48.7 56.7
63.5
66.3
65.4
61.0
52.5
44.6
51.1
1895
38.4
32.5
34.5
40.2
47.4
57.2
63.8
66.4
65.7
59.4
52.3
44.4
50.2
1896
38.4
35.8
35.2
40.4
48.5
56.9
63.5
67.2
65.1
M
53.4
45.4
(50.8)
97
38.4
34.6
36.4
42.0
48.2
56.0
64.4
68.2
66.1
60.7
53.6
45.8
51.2
98
40.1
-
38.8
-
47.8 56.7
62.7
-
-
60.7
52.6
-
(50.8)
99
37.4
-
-
40.6
48.3
57.0
62.6
66.4
66.3
60.0
53.5
46.5
(50.7)
1900
39.4
36.1
35.6
41.0
47.4
56.5
63.3
67.0
67.2
62.7
54.7
45.9
51.4
1901
39.6
34.0
34.4
39.8
48.1 56.2
63.8
66.0
66.9
60.8
51.0
41.3
50.2
02
37.0
34.4
36.7
41.3
48.6
55.2
61.0
65.2
65.1
61.5
54.2
44.3
50.4
03
37.8
35.5
38.9
43.5
49.0 53.8
59.3
61.9
61.4
57.3
50.4
40.2
49.1
04
33.0
31.2
31.4
36.2
44.1
52.8
59.2
62.3
61.3
55.1
47.8
38.6
46.1
1905
1906
33.6
29.4
35.6*
31.6
37.4
43.3
51.1
59.0
62.0
61.1
56.2
48.0
41.7
46.2
Mean
1878
1906
(26)
(25)
(25)
(25)
(27)
(27)
(26)
(26)
(26)
(26)
(27)
(26)
37.3
34.3
35.3
39.9
47.3
55.8
62.7
65.7
65.0
59.7
51.9
43.5
49.9
N.B. Data up to June, 1903, looks unusually good in the original.
From June, 1903, on the readings appear to be consistently too low,
possibly because of broken mercury column.
* Incomplete obs.
Readings at first high water and first low water after 7 a.m.
Source - USCFF
1)3
o
Monthly and Annual Mean Surface Water Temperatures, F
o o
NEW HAVEN, CONNECTICUT Ul 18 'N. 72 5U'W.
Year Jem. Feb. Mar. Apr. May June July Aug. Sept, Oct. Nov. Dec. Ann.
60.0 U8.6 UO.O -
60.0 16.3 3U.1; -
55.5 - 35.8 -
58.9 U5.8 37.5 -
59.6 U8.U 36.U 51.8
1886 32.5 32.6 35.8 k9.h 56.8 65.3 71.0 - - - - - -
(5) (5) (I) (3) (6) (li) (5) (5) (U) (5) (U) (5)
Mean 32. U 32.1i 3U.8 U6.6 56.2 65.5 72.8 73.1* 67.9 58.8 U7.3 36.8
1881
•
_
_
_
58.9
62.9
71.3
73.U
70.1
82
33.7
3li.3
-
-
53.2
-
73.1
7U.2
68.5
83
31.0
31.6
35.0
U5.U
57.7
68.9
73.8
72.3
65.8
8U
31.1
33.0
35.5
-
56.3
-
.
72.U
-
1885
33.8
30.5
32.9
U5.0
5U.0
6U.9
7U.9
7U.5
67.2
Harbor frozen over 22 Feb. to 8 March, 1883.
Wharf near mouth of Quinnipiac River in harbor.
Readings at 2 p.m., Washington time
Source - USCFF
54
0
Monthly and Annual Mean Surface Water Tenperatures, F
STRATFORD ;
SHOAL LIGHTHOUSE
0
Ui oU'K
I. 73
0
06'W.
Year
Jan.
Feb.
Mar.
Apr.
May
J\ine
July
Aug.
Sept.
Oct.
Nov.
Dec.
Ann.
1878
79
1880
-
-
3U.9
-
-
60.3
63.0
68.3
71.3
70.0
70.3
68.9
6U.8
53.0
53.8
UO.6
-
1381
82
83
8U
1385
33.2
38.U
3U.3
3U.U
36.6
31.0
3U.6
32.0
32.7
30.9
31;. 3
36.7
32.9
33.U
31.U
38.3
UO.8
39.7
Uo.i
37.0
U8.6
U7.3
U9.5
U9.1
U6.7
53. U
58.U
59.U
53.3
55.8
65.1
65.7
67.6
6U.3
66.U
68.U
68.6
69.2
68.7
70.U
68. U
69.0
68.2
69.6
63.2
66.6
6U.0
61.2
6U.3
63. U
56.U
53.9
52.3
53.3
5U.5
U6.6
Ul.6
U3.0
U3.6
U2.7
51.3
51.6
50.3
51.0
50.3
1886
87
88
89
1890
35.1
33.6
3U.5
38.2
Ul.3
31.8
32.7
30.5
3U.U
38.U
3?.U
32.3
31.1
35.2
36.9
lil.O
37.5
37.2
UO.U
Ul.6
U9.U
U6.2
U9.8
50.1
58.1
57.0
59.7
59.0
6U.6
67.9
63.2
67.3
65.5
69.2
72,3
68.3
70. U
68.9
69.2
67. U
67.2
69.2
63.9
63.7
61.0
59.0
60.0
63.8
5U.2
50.3
51.6
52.6
53 .U
UO.9 (50.3)
U3.0 50.5
U2.6 U9.0
U5.6 51.9
U2.6 52.6
1891
92
93
3li.5
39.3
32.3
3U.5
3U.7
30.1
35.5
3li.l
31.9
Ul.O
38.7
38.0
U8.5
U7.2
U6.8
57.7
57.9
56.6
6U.0
65.9
65.0
69.1
70.7
69.3
70.0
69.7
63.U
6U.2
62.9
62.3
52.5
52.7
53.8
U5.5
U2.2
U3.5
51.U
51.3
U9.3
Mean
(13)
35.9
(13)
32.9
(Hi)
33.8
(13)
39.3
(12)
U8.3
(lU)
58.6
(lU)
65.3
(15)
69.6
(15)
68.9
(lA)
62,9
(15)
53.2
(U)
U3J.
51^
Readings at first high water and first low water after 7 a.m.
Source - USCFF
55
Monthly and Annua] Mean Surface Water Temperatures, F
BLOCK ISLAND, S.E. LIGHT
4P09'N 71°33'W
Year Jan. Feb. Mar. Apr. May June July Au^. Sept. Oct. Nov. Dec. Ann.
1878
67.0
58.9
79
-
-
-
-
57.6
65.8
-
66.5
-
-
-
-
1880
42.0
-
-
-
55.8 63.5
68.2
68.2
65.6
59.1
46.1
38.8
-
1881
32.4
31.9
35.3
40.0
57.0
64.6
64.8
63.9
60.6
49.6
mm
(49.2)
82
38.8
37.4
39.2
41.8
46.3 58.1
66.1
69.3
66.3
58.8
47.7
39.1
50.7
83
-
-
37.4
45.6 56.6
-
64.4
62.0
54.4
-
42.4
(48.8)
84
-
-
37.0
43.3
51.2 60.2
63.1
64.8
63.6
57.3
49.5
41.4
50.3
1885
38.2
-
-
40.7
47.0 57.2
66.7
69.6
63.8
58.8
51.6
40.6
(50.6)
1886
36.5
34.6
37.5
43.1
46.3 59.4
67.0
66.3
64.8
59.4
53.2
42.6
50.9
87
35.1
36.5
37.7
45.6
55.3 59.6
68.2
69.6
63.8
57.5
50.7
42.9
51.9
88
-
-
-
40.4
48.8 60.1
65.7
66.8
63.0
53.9
48.4
41.3
(49.8)
89
41.1
38.4
40.7
44.5
56.7 60.3
66.4
68.7
65.5
55.9
49.4
43.8
52.6
1890
40.7
40.9
39.9
47.2
51.0 62.3
68.0
67.3
65.4
57.5
47.4
38.0
52.1
1891
36.7
36.9
39.0
44.1
50.8 61.8
64.0
67.7
65.8
57.9
46.8
42.6
51.2
92
38.5
36.1
36.5
43.7
51.0 60.2
67.1
69.3
65.8
56.2
46.7
37.9
50.8
93
-
-
36.0
42.0
47.9 59.7
67.0
66.8
62.3
55.6
48.4
40.8
(49.9)
94
38.0
-
39.8
42.7
54.2 61.5
66.0
65.9
63.6
60.4
49.0
41.4
(51.5;
1895
36.1
-
39.0
43.1
53.0 62.5
67.1
68.7
62.5
52.5
46.6
39.1
(50.4)
1896
33.1
»
33.5
41.8
50.8 57.8
64.9
66.5
61.9
53.9
47.8
39.6
(48.9)
97
-
33.2
36.4
43.2
47.9 59.4
65.8
67.6
62.2
54.4
48.7
39.2
(49.6)
98
-
-
-
40.8
45.8 -
-
67.4
64.3
54.9
-
37.1
-
99
-
-
-
-
60.1
63.9
65.2
62.1
55.0
-
48.4
-
1900
36.5
34.7
35.9
43.9
48.6 56.9
64.2
67.9
66.4
57.8
46.5
39.1
49.9
1901
35.3
_
33.7
38.2
49.2 53.9
62.1
63.9
62.9
55.8
41.4
39.7
(47.8)
02
-
33.6
38.4
44.4
51.6 58.2
63.3
66.9
65.6
59.5
53.1
42.2
(51.2)
03
36.6
36.9
43.0
46.0
55.6 56.9
65.3
64.6
63.0
58.8
49.4
36.9
51.1
04
-
-
34.1
40.4
50.4 60.2
65.1
68.6
64.2
57.7
46.1
35.2
(49.5)
1905
33.5
30.5
35.1
42.0
47.5 57.2
65.7
66.9
65.6
56.6
47.4
41.8
49.2
1906
.
^
.
44.6
52.1 58.4
63.3
68.3
65.9
59.8
48.3
40.4
.
07
-
-
-
—
- -
-
63.4
62.6
54.9
48.3
39.2
-
08
36.8
31.3
34.9
40.4
47.9 58.2
65.6
64.8
63.0
58.7
47.9
~
(49.2)
Mean
1878
(18)
(14)
(21)
(26)
(27) (28)
(27)
(30)
(30)
(30)
(26)
(27)
1908
37.0
35.2
37.3
42.5
50.2 59.1
65.6
66.9
64.1
57.1
48.3
40.4
50.3
Readings at first high water and first low water after 7 a.m.
Source - USCFF
56
Monthly and Annual Mean Surface jVater Temperatures, °F
BLOCK ISLAND 41°10.4'N 71°33.4'W
Year Jan. Feb. Mar. Apr. May June July Aug. Sept. Oct. Nov. Dec. Ann»
1881 - - - - 49.8 58.4 65.6 67.2 65.6 58.0 50.1 44.6 -
82 37.8 36.4 - - 48.2 - 64.2 67.4 65.5 59.1 49.7 39.6 -
83 34.0 34.2 35.4 42.1 50.8 59.1 - 66.5 63.6 55.8 49.7 40.9 (49.7)
84 34.4 36.8 37.2 - 50.6 59.2 64.6 66.8 - 57.8 48.6 41.5 (50.4)
1885 - - 33.9 41.6 49.4 57.5 66.2 68.3 63.2 57.7 50.9 41.1 (50.0)
1886 35.4 32.6 35.0 42.5 51.1 59.0 64.7 66.2 66.0 59.0 50.0 40.7 50.2
Mean (4) (4) (4) (3) (6) (5) (5) (6) (5) (6) (6) (6)
35.4 35.0 35.4 42.1 50.0 58.6 65.1 67.1 64.8 57.9 49.8 41.4 50.3
Government Wharf - Main Road
Readings at 2 p.m., lashington time,
Source - USCFF
57
Monthly and Annual ikean Surface Water Temperatures, F
FIRE ISLaT.'J lighthouse, N.Y. 40037'57"N. 75°13'09"W.
Year Jan. Feb. Mar. Apr. V.ay June July Aug. Sept. Oct. Nov. Dec. Ann.
1878 . - - _ _ _ 70.8 71.9 69.6 61./. 47.2 38.2 -
79 31.4 31.5 39.9 45.7 61.0 66.6 - - - _ _ _ _
1880 _ - - _ _ _ 71.7 70.8 67.3 59.0 46.5 35.1 -
44.5 56.4 62.3 70.0 69.0 69.2 61.0 53.1 43.0 52.7
44.9 52.6 63.7 70.3 72.6 69.4 60.8 48.4 36.4 52.7
44.1 53.4 66.4 71.0 69.7 65.2 58.3 48.6 38.7 52.0
46.3 55.7 64.9 67.5 70.4 68.3 60.6 47.9 39.5 52.7
45.5 53.4 61.5 70.8 72.8 65.6 57.9 46.3 37.8 -
1886 34.1 33.3 37.4 ------ ----
87 - 35.1 37.2 45.8 59.4 64.2 69.7 72.5 65.0 57.2 - - -
(7) (7) (7) (7) (7) (7) (8) (8) (8) (8) (7) (7)
Mean 33.8 34.7 38.9 45.2 56.0 64.2 70.2 71.2 67.4 59.5 48.3 38.4 52.3
Readings at first high water and first low water after 7 a.m.
Source - USCFF
1881
31.1 33.9
39.0
82
36.7 35.9
40.8
83
34.5 36.1
37.4
84
33.2 37.3
40.8
1885
36.0 -
-
58
Monthly and Annual Mean Surface A'ater Tanperatures, °F
FIRE ISLAND LIGHTSHIP 40^29 'N. 73°11'',V.
Year Jan. Feb. Mar. Apr. May June July Aug. Sept. Oct. Nov. Dec. Ann.
1925 - - - - - to. 7 66.8 67.0 64.9 55.2 46.7 41.6 -
1926 35.8 31.3 33.3 39.1 49.6 58.3 68.3 69.0 65.4 60.7 52.5 42.6 50.5
27 36.2 35.8 37.7 40.4 49.4 58.8 66.4 68.2 67.4 63.2 54.3 47.3 52.1
28 41.8 38.6 39.6 43-5 50.5 60.5 63.9 70.5 67.6 61.9 54.3 46.9 53.3
29 41.5 37.4 39.7 43.9 50.4 62.4 - 69.2 65.6 59.6 54.3 44.8 (53.1)
1930 39.8 36.6 38.3 43.0 51.5 60.2 67.4 67.5 68.2 59.3 53.4 44.0 52.4
1931 36.8 34.2 35.5 40.5 48.0 58.6 67.1 68.3 67.9 62.6 52.5 46.4 51.5
32 41.7 40.5 37.4 ------ ____
33 - - - - 54.1 62.8 68.4 71.2 68.7 62.3 52.5 44.9 -
34 39.1 - 33.6 41.7 51.2 - 72.2 70.0 68.3 63.1 54.3 46.4 (53.0)
1935 41.1 34.9 37.6 42.6 51.5 61.3 71.9 72.0 66.4 59.5 56.3 46.3 52.6
1936 38.4 32.6 37.1 42.7 52.7 62.7 70.8 71.6 67.6 62.5 53.4 45.2 53.1
37 43.0 39.8 39.4 40.5 52.4 63.2 70.7 72.8 67.7 60.2 52.6 45.7 54.0
38 - 38.9 38.9 45.6 52.4 62.0 69.8 71.8 65.1 60.4 56.4 46.9 (54.0)
39 41.9 38.8 40.2 43.5 50.9 64.8 70.1 74.7 69.5 63.8 53.2 46.6 54.8
1940 37.4 34.6 35.8 39.3 49.2 58.8 - - - _ _ - -
(13) (13) (U) (13) (14) (14) (13) (13) (13) (13) (13) (13)
Mean 39.6 36.5 37.4 42.0 51.0 61.1 68.8 70.3 67.2 61.0 53.3 45.4 52.8
Readings at 8 a.m. and 6 p.m.
Source - U3BF
59
o
Monthly and Annual Mean Surface Water Temperatures, F
NEW YORK CITY
UO U3'N.
7U Ol'W,
Year
Jan.
Feb.
Mar.
Apr.
May
June
Jul7
Aug.
Sept.
Oct.
Nov.
Dec.
Ann.
1873
7li
1875
36.2
32.0
33.2
36.0
ho. 3
53.0
67.0
72.9
73.2
69.0
70.9
^9.h
60.2
UU.8
38.6
38.5
(52.6)
1876
77
78
79
1880
33.7
32.1
37.3
35.U
33.9
3U.3
UO.3
36.3
hl.9
50.2
Ul.8
53.6
58.8
57.9
58.2
62.8
6h.6
66.7
69.2
70.6
72. U
73.8
73.6
73.U
73.6
72.8
67.7
71.8
68.0
69.7
59.3
62.2
63.2
60.3
h7.5
U8.8
U7.9
U8.2
39.5
39.8
hO.7
35.5
(5U.3)
52.9
(53.2)
1881
82
83
8U
1885
30.0
32.2
32.U
31.0
3h.U
32.5
33.6
31.7
35.6
36.0
33.8
ii2.8
liU.O
52.2
56.5
5U.h
65.3
65.0
67.0
65.1
71.7
72.0
7U.0
72.1
73.2
73.7
71.6
73.0
76.5
72. U
70.3
67.2
68.6
63.9
61.7
62.0
52.1
U9.7
U8.6
37.1
39.3
39.8
(52.7)
(52.U)
(52.1)
(52.U)
1886
87
88
89
1390
3U.1
32.3
32.8
iiO.3
32.5
3U.6
32.U
32.2
35.5
35.7
33.6
36.6
U6.6
Ul.6
Ul.7
57.1
5I1.O
57.7
6U.3
68.1
6U.7
72.6
69.7
73.6
75.3
73.2
70.U
72.2
67.6
67.8
68.2
6U.7
58.9
55.8
5U.3
50.8
U7.3
U9.2
50.2
38.0
U0.2
38.0
li2.U
53.5
(52.7)
(51.U)
(52.0)
Mean
(12)
33.8
(12)
33.1
(11)
35.8
(10)
U3.6
(11)
55.8
(12)
65.3
(11)
72. )4
(lii)
73. I4
(lU)
69.h
(13)
60.h
(12)
U8.3
(13)
39.0
52.6
North River, Pier 13 & Ih,
1873-Oct. 1879 inol., readings at 3 p.m. local time.
Nov. 1879-June 1881 incl., " " 1 p.m. " "
July 1881-Nov. 1881 incl., " " 2 p.m. " "
Feb. 1892-Oct. 188A incl., " " 2:12 p.m." "
Feb. 1885-1390, incl., " " 2 p.m. 75th meridian time.
SoTorce - U3CFF
60
Monthly and Annual Mean Surface Water Temperatures, F
SANDY HOOK LIGHTSHIP
UO°26'12"N. 73 5l'I;2"W.
Year
Jan.
Feb.
Mar.
Apr.
May
June
July
Aug.
Sept.
Oct.
Nov.
Dec.
Ann.
1878
_
«
.
.
_
_
68.U
71.2
69.5
61.7
51.2
U2.I.
.
79
1880
-
-
-
-
56.0
67.1+
72.1
71.7
70.0
61.8
51.0
^1.5
-
1881
82
83
8U
1885
3li.l
li2.6
36.2
35.7
36.1
33.8
39.5
35.8
3li.9
35.8
36.1
Uo.i
37.3
36.3
35.8
U2.2
Ui.2
U3.9
U2.6
39.8
55.6
50.8
55.0
52.9
U8.5
62.ii
60.6
6U.9
60.8
56.5
70.1
69.2
71.6
66.0
68.6
70.0
72.1
66.8
68.9
71.0
70.5
69.9
65.8
68.3
65.0
63.3
63.2
58.6
60.2
55.7
55.1
53.8
50.7
L8.7
li9.9
U7.1
U3.0
Ul.8
U1.9
U2.2
53. li
5U.1
52.1i
51.U
50.U
1886
87
88
89
1890
36.7
38.2
UO.8
U2.2
U5.8
35.1
39.1
36.2
39.0
U3.1
36.9
39.6
36.2
39.6
ii2.0
U3.9
U3.2
i;2.5
Ui.7
U6.3
52.3
56.0
51.8
57.0
5U.2
61.5
65.7
62.6
63.0
6U.6
69.1
71.I4
67.7
69.2
67.3
71. U
73.9
71.5
69.U
68.8
69.9
68.2
66.6
69.2
6U.9
63.5
60.7
57.2
59.3
59.2
5h.U
52.8
51.9
53.2
50.1
U2.9
U5.5
U3.9
U7.3
Ul.O
53.1
51i.5
52.1i
5U.U
53.9
1891
92
36.1i
liO.3
36.6
UO.6
39.5
Uo.o
kh.8
hS.9
52.8
51.7
6l.li
5U.3
66.6
67.0
66.9
62.3
50.7
h5.6
52.6
Mean
(12)
38.8
(12)
37.5
(12)
38.3
(12)
U3.7
(13)
53. U
(13)
62.0
(13)
69.0
(13)
70.3
(13)
68.1
(13)
60.5
(13)
51.8
(13)
U3.5
53.1
Readings at first high water and first low water after 7 a.
Source - DSCFF
61
o
Monthly and Annual Mean Surface Water Temperatures, F
MBROSE LIGHTSHIP
, 0
UO 27,
.I'N.
73°U9.U'W.
Year
Jan.
Feb.
Mar.
Apr.
May
June
Juljr
Aug.
Sept.
Oct.
Nov.
Dec.
Ann.
1937
38
39
19U0
Ul.2
U3.1
37.2
39.9
39.U
35.3
liO.9
hO.U
36.5
U5.6
U3.9
Ul.2
53.7
52.2
50.1
63.3
6U.U
60.6
69.2
69.1
68.1
71.1
7U.9
72. U
69.9
67.9
60.1
62.6
58.1
55.3
52.0
51.3
U5.8
U7.2
U6.0
U5.U
^5U.7)
5U.8
52.0
19lil
Ul.3
38.1
36.6
U3.8
52.U
60.9
66.U
69.0
68.0
60.1
52.9
-
(53.0)
U2
U3
hh
19U5
39.9
36.7
37.8
37.0
Uo.5
51.7
50.9
6U.0
62.0
65.3
67.2
-
68.5
-
53.9
-
-
19U6
hi
U8
U9
1950
U0.8
U3.3
38.3
3U.5
Ul.7
50.5
50.U
59.7
63.6
67.7
70.3
-
68.8
62.6
59.U
U9.8
U7.3
-
1951
52
U3.2
39.1
bl.l
39.7
U3.2
56.2
52.1
63.2
60.2
67.8
72.9
70.0
63.8
-
-
-
53
5U
1955
Ul.7
38.6
39.6
U3.6
53.2
60.8
68.1
69.6
73.2
70.7
6U.U
53.5
53.9
U7.7
U5.3
-
1956
37.8
36.5
38.1
Ul.6
U9.1
61.2
-
-
-
-
-
-
-
Mean
(10)
Ui.o
(10)
38.3
(10)
38.1
(9)
U2.8
(12)
51.9
(12)
62.0
(11)
68.1
(6)
72.2
(7)
69.1
(7)
61.7
(8)
5U.1
(8)
U6.8
53.8
Readings at 0130, 0730, 1330 and 1930 EST
Source - NURC
62
o
Monthly ^d Annual Mean Surface Water Temperatures, F
SANDY HOOK,
, NEW JERSEY
U0°28
•N. 7U°01«W
•
Year
Jan.
Feb.
Mar.
Apr,
May
June
July
Aug,
Sept,
Oct.
Nov,
Dec.
Ann.
1881
82
83
8h
1885
32.9
35.2
38.8
38.8
33.5
37.7
3U.3
37.9
37.6
36.7
U5.5
U5.0
U2.6
Uh.7
58.3
53.2
50.0
51.7
53.3
66.6
6U.2
63.0
73.8
69.8
71.6
70,7
75.1
72.9
71.1:
72.0
75.1
71.6
70.0
67.3
70,7
71.^
62,1
63.9
58. Ij
61.0
61.1:
52,0
52.0
50,9
U8,9
52.9
U5.0
39.0
Uo.i
1:1.7
(53.6)
51.9
(53.0)
53.7
1836
87
88
89
1890
3U.5
32.0
31.8
36.0
33.0
32.0
32.7
3U.6
33.1
39.2
39.U
H5.6
U8.0
1*5.9
h8.6
h8.9
59.8
61.0
55.6
62.2
59.9
6h.h
68.7
68,7
70.0
68.5
71,U
77.5
70,3
7h,7
72.1
73.3
73.9
72.7
72,7
72.7
71.7
65.5
66,2
68.7
67.6
62,7
56,1
52,7
51.8
57.0
Ul:,l
U8.6
Ul:.l:
U6.1j
1:0,5
36.0
38,8
3U,9
(53.2)
(53.U)
51.2
53.0
(53.2)
1891
92
93
3ii.O
35.2
29.8
38.3
3li.7
31.3
38.7
36.1
35.6
U9.6
U7.3
U5.3
57.1:
57.9
55.6
68.5
69.1:
68.5
71,1
73.6
71:, 3
7U.8
70.5
69.3
57.1:
55.6
U6.1,
U3.9
U0.5
31.3
53.9
52.7
Mean
(10)
3U.0
(10)
3U.6
(10)
36.5
(12)
U6.1j
(13)
56.6
(11)
67.3
(11)
72. U
(12)
73.1:
(12)
69.2
(12)
58.3
(11)
1:8.2
(10)
39.1
53.0
Government Dock
II
II
Jetty
Pier
Readings at 2 pm., local time
Source - OSCFF
63
o
Monthly and Annual Mean Surface Water Temperatures, F
BARNEGAT LIGHTSHIP
0
39 h5.8'N.
0
75 56.0'W.
Year
Jan.
Feb.
Mar.
Apr.
May
June
July
Aug.
Sept.
Oct.
Nov.
Dec.
Ann.
19li7
U8
U9
1950
39.6
U3.5
hh.2
36.1
U2.0
i;2.2
hl.6
39.2
h6.6
hh.l
51.5
55.8
51.6
62.6
67.1
61.6
69.7
7h.3
70.2
70.5
75.h
71.h
70.h
68.7
69.0
61.6
6h.2
62.8
56.0
56.h
56.h
57.7
h9.6
h6.3
U7.7
(5h.6)
56.9
55.1
1951
52
53
Sh
1955
UO.8
U2.6
hh.O
Ul.9
Ul.l
39.9
Ul.U
lil.7
ho. 2
38.0
ho. 7
hl.5
h2.0
hl.h
ho.h
U6.6
U7.2
h7.6
h6.9
h3.7
55.8
5h.6
56.0
5h.2
5h.h
65.2
6h.9
62.h
63.1
63. h
71.2
7h.O
72.6
69.1
70.7
7h.6
75.1
73.6
72.1
71.6
70.6
71.5
69.0
62.5
63.1
63.2
6h.7
63.8
5U.3
5h.9
56.1
55.0
5h.7
U6.5
h7.8
hS.l
h6.3
h2.8
55.8
56.5
56.6
55.3
(5h.7)
1956 38.3 38.3 38.6 Ul.9 5o.O 62.8 70.7 72.5 -
(9)
(9)
(8)
(8)
(9)
(9)
(9)
(8)
(7)
(8)
(9) (8)
hl.8
hO.O
hO.7
h5.6
53.8
63.7
7l.h
73.2
70.1
63.2
55.7 h7.0
Mean hl.8 hO.O hO.7 h5.6 53.8 63.7 71.h 73.2 70.1 63.2 55.7 h7.0 55.5
Readings at 0130, 1730, 1330 and 1930 EST.
Source - Nmc
64
0
Uonthly and Annual Uean Surface Water Tenperatures, F
ABSECON INLET, NEW
1 JmSEY
0
39 21'59"N.
0
. 74 24'52"W
•
Year
Jan.
Feb.
Mar.
Apr.
May
June
July
Aug.
Sept.
Oct.
Nov.
Dec.
Ann.
1878
.
_
_
_
_
69.7
70.7
.
62.0
49.0
40.6
.
79
33.7
34.8
41.6
46.6
59.9
63.8
68.5
71.9
66.6
65.0
51.0
46.1
54.1
1880
45.2
U.5
47.8
53.7
68.2
75.6
77.2
74.1
73.2
62.2
46.7
34.9
58.6
1881
32.6
33.6
38.5
46.1
58.0
65.0
73.4
73.1
73.4
64.0
54.0
45.4
54.8
82
37.0
36.0
45.3
49.0
53.9
61.8
70.7
72.5
70.8
63.6
52.5
37.5
54.2
83
35.6
36.6
38.8
42.9
54.0
65.8
71.1
66.1
67.6
58.7
47.7
41.0
52.2
6h
34.2
38.5
39.8
47.2
57.7
68.6
71.0
74.4
72.4
66.1
51.8
40.1
55.2
1885
33.5
33.1
37.3
48.2
55.6
66.8
73.1
77.9
70.1
57.8
55.5
41.2
54.2
1886
33.1
33.0
38.7
47.9
54.4
65.5
73.2
71.4
71.4
62.0
50.0
38.9
53.3
87
35.1
38.0
38.9
46.4
59.0
67.4
74.1
75.0
67.4
60.0
48.6
41.6
54.3
88
34.4
35.6
36.2
47.2
56.9
65.2
69.9
72.0
67.5
56.0
50.5
39.7
52.6
89
37.6
34.3
39.1
47.6
58.6
64.6
68.2
65.0
69.6
55.2
51.6
U.7
53.0
1890
43.6
43.0
41.7
48.7
57.1
70.3
75.3
74.5
-
60.2
49.8
39.1 (56.2)
1891
37.8
40.3
40.1
47.8
56.6
67.6
71.5
73.8
73.4
60.8
53.6
41.4
55.4
92
37.6
.37.4
37.1
45.8
57.0
66.3
72.7
75.2
70.5
60.8
47.2
40.5
54.0
93
32.0
34.3
37.8
49.5
56.0
68.2
70.8
73.2
70.1
60.9
49.2
43.6
53.8
94
39.3
38.0
44.9
46.7
58.2
64.5
66.3
70.4
73.5
62.4
50.6
41.7
54.7
1895
34.4
32.0
39.0
48.1
51.5
68.8
76.1
73.7
71.8
58.9
50.7
41.1
53.8
1896 34.6 37.9 36.0 46.8 56.5 64.8 71.9 74.7 70.3 57.9 54.1 - (53.9)
(18)
(18)
(18)
(18)
(18) (18)
(19)
(19)
(17)
(19) (19) (18)
36.2
36.7
39.9
47.6
57.2 66.7
71.8
72.6
70.6
60.8 50.7 41.1
Mean 36.2 36.7 39.9 47.6 57.2 66.7 71.8 72.6 70.6 60.8 50.7 41.1 54.3
Readings at first high water and first low water after 7 a.m.
Source - USCFF
65
Monthly and AnnuJil Mean Surface Water Temperatvires, °F
ATLANTIC CITY, N.J. 39°21«N. 74°25' W.
Year Jan. Feb. Mar. Apr. May June July Aug. Sept. Oct. Nov. Dec. Ann.
1881 ----- 63.4 72.8 71.0 73.3 64.2 53.7 44.0 -
82 38.5 39.1 - - 54.5 - 70.9 72.9 71.1 63.8 52.8 37.9 (54.4)
83 36.1 37.0 39.0 44.8 54.3 66.3 71.3 - 68.0 59.0 47.9 - (53.3)
84 34.4 38.7 40.2 - 57.8 - 71.5 74.7 72.7 66.2 52.0 41.6 (55.2)
85 34.2 33.1 37.4 48.6 56.3 67.1 74.0 78.9 70.5 58.5 55.0 42.0 54.6
1886 33.2 33.1 39.2 48.2 54.8 65.8 73.5 72.7 71.6 - - - (54.8)
(5) (5) (4) (3) (5) (4) (6) (5) (6) (5) (5) (4)
Mean 35.3 36.2 39.0 47.2 55.5 65.6 72.3 74.0 71.2 62.3 52.3 a.4 = 54.4
1881 - Wharf, Baltic Ave.; November, 1883, Absecomb Inlet; February 1884, Wharf,
Atlantic Ave.; September 1885 - Iron Pier - Mass. Ave,
Readings at 2 p.m., 75th meridian time.
Source - USCFF
66
Monthly and Annual L'ean Surface vjater Teanperatures, °F
FIVE F^THOM E-iNK (North East End LL^t) 38°57«45"N. 74°29'34"W.
Year Jan. Feb. Mar. Apr. May June July Aug. Sept. Oct. Nov. Dec. Ann.
1904 --- _____ 70.6 61.6 53.0 42.3 -
1905 37.6 - 35.4 43.8 54.2 63.6 71.8 72.5 68.8 63.8 54.8 47.0 -
1906 42.1 39.6 39.4 44.2 54.0 63.0 70.4 75.4 71.5 64.4 - 45.1 -
07 - 36.5 37.6 41.9 50.3 58.1 68.1 70.7 67.5 58.2 51.3 45.0 -
08 42.7 37.8 39.6 46.5 54.5 66.1 70.3 72.8 -----
(3) (3) (4) (4) (4) (4) (4) (4) (4) (4) (3) (4)
Meqn 40.8 38.0 38.0 44.1 53.2 62.7 70.2 72.8 69.6 62.0 53.0 44.8 54.1
Readir?:?! at flr=7t high water and first low water after 7 a.m.
Source - USBF
67
Monthly and Annual Mean Surface V.'ater Temperatures, F
FIVE FATHOM BaNK 38°48'N. 74°36'W.
Year
Jan. Feb.
Mar.
Apr.
Ma,y
June
July
Aug.
Sept.
Oct.
Nov.
Dec.
Ann.
1878
79
1880
35.1 35.2
44.1 -
37.3
-
63.1
67.2
74.4
72.5
70.0
72.2
72.1
69.2
71.3
65.6
64.3
49.2
55.6
45.9
44.6
-
1881
82
83
84
1885
33.8
44.1 40.2
37.6 37.6
38.8 38.4
42.7 37.5
39.4
42.0
39.2
37.4
35.2
41.6
45.6
42.6
42.7
40.1
53.4
51.6
51.8
53.6
46.5
64.0
62.0
63.2
62.1
61.1
71.0
70.7
70.3
67.2
70.4
70.0
74.6
70.0
71.1
74.1
73.1
71.9
68.2
70.8
68.4
67.1
65.1
63.1
64.3
62.6
59.6
55.5
54.4
56.3
56.2
50.8
44.2
47.1
47.4
46.0
(55.4)
55.6
53.8
54.2
53.4
1886
87
88
89
1890
38.4 36.6
38.9 38.6
39.6 35.5
42.3 40.1
48.0 44.4
36.9
38.8
35.2
a. 7
42.6
41.5
U.O
43.9
45.5
51.7
53.6
51.0
53.8
53.6
63.6
63.2
64.8
64.2
70.1
73.4
69.6
75.4
72.6
71.8
75.7
72.7
66.8
71.4
72.0
69.2
67.4
68.4
66.0
63.2
60.1
60.0
62.3
57.3
53.2
53.5
53.5
53.3
47.1
46.5
44.7
48.4
45.0
54.5
54.6
52.9
(54.8)
(55.8)
1891
92
93
94
1895
39.2 39.3
43.0 36.9
33.2 33.1
43.4 40.2
34.6
39.8
37.2
35.8
41.6
36.2
46.0
43.0
43.1
45.5
41.7
51.3
51.9
56.3
50.8
63.8
63.9
65.3
64.0
64.6
70.4
66.6
73.0
70.8
70.7
73.3
74.9
71.2
74.2
72.4
70.6
71.0
71.9
64.7
60.5
63.5
64.2
63.5
53.1
51.5
55.9
55.3
54.9
48.7
44.1
47.4
49.0
46.7
(55.3)
53.6
(53.8)
56.0
(54.2)
1896
97
98
99
40.3 38.1
41.3 36.1
42.6 38.6
39.0 -
37.0
39.2
42.0
43.3
45.2
45.7
42.9
54.6
54.1
51.9
53.7
63.3
64.0
67.6
69.4
72.3
71.9
68.7
73.2
74.1
72.9
70.6
71.3
61.4
62.5
63.6
55.9
57.0
48.7
42.0
49.7
54.6
(55.0)
(55.2)
Mean
(19) (19)
40.6 37.6
(18)
38.4
(19)
43.3
(18)
52.5
(18)
63.8
(21)
70.8
(20)
72.3
(18)
70.5
(23)
63.4
(19)
54.8
(20)
46.7
54.6
Readings at first high water and first low water after 7 a.m.
Source - USCFF
68
Monthly and annual Mean Surface Water Temperatures, °F
FIVa FATHOM BANK LIGHTrHIP 38°47<N. 74°34''.V.
Year Jan. Feb. Mar. Apr. May June July Auf. . Sept. Oct. Nov. Uec. ■\nn.
1925 ------ 72.2 72.2 71.1 61.2 51.8 46.O -
1926 38.1 35.5 36.2 W.9 51.3 60. /♦ 68.9 73.7 69.2 62.9 55.2 45.1 53.1
27 37.6 37.9 39.8 43-3 - 60.2 67.5 70.7 69. 0 64. 0 55.5 45.8 (53.7)
28 42.7 39.7 39.8 45-4 51.6 62.3 69.4 73-5 70.6 62.9 55.8 48.0 55.1
29 43.6 37.8 - 46.3 53.8 64.2 69.2 72.4 69.6 - 55.8 47.3 (55.2)
1930 42.5 39.3 41.4 45.9 55.8 64.4 72.1 71.8 71.8 63.8 55.0 47.0 55.9
1931 40.8 38.8 38.9 44.6 52.5 63.0 70.7 73.5 71.4 64.O 56.5 52.1 55.6
32 47.0 44.6 40.8 45-5 - 64.4 70.9 73.4 69.3 64.3 56.5 48.2 (56.5)
33 45.3 a. 8 40.7 45.2 56.6 65.7 69.8 74.2 72.9 64.9 53.9 45.9 56.4
34 42.3 35.0 35.0 40.9 - 64.2 73.7 71.1 70.6 63.2 54.6 47.6 (54.3)
1935 41.0 35.6 39.3 43.4 51.6 63.7 71.0 73.6 69.6 60.1 55.6 43.5 54.0
1936 35.3 - 38.3 43.9 56.3 65.3 71.8 73.8 - 64.8 56.5 47.0 55.2
37 44.4 40.5 39.0 43.0 54.2 63.6 72.0 70.6 67.0 59.1 53.0 45.7 54.3
38 41.3 40.4 40.8 44.7 53.4 61.5 69.4 71.7 70.1 60.6 56.5 47.9 54.8
39 42.1 39.2 39.8 44.1 54.2 65.5 67.5 76.1 70.1 65.3 55.0 47.0 55.5
1940 38.5 36.1 37.5 41.6 51.6 63.3 - - - _ - _ -
(15) (14) (14) (15) (12) (15) (15) (15) (14) (14) (15) (15)
Mean a.5 38.7 39-1 43.9 53.6 63.4 70.4 72.5 70.2 62.9 55.1 46.9 54.9
Readings at 8 a.m. and 6 p.m.
Source - DSBF
69
o
Monthly and Annual Mean Surface -i/ater Temperatures, F
0 o
FIVE FATHOM BANK LIGHTSHIP 38 47'N. 74 34'W.
Year
Jan.
Feb.
Mar.
Apr.
May
June
July
Aug.
Sept.
Oct.
Nov.
Jec.
Ann.
1947
_
.
_
_
^
•*
^
_
72.9
65.4
57.3
46.6
_
48
40.2
38.2
40.9
44.6
50.9
61.0
70.8
70.8
70.4
62.1
57.6
50.3
54.8
49
43.3
43.2
42.1
46.2
56.1
67.6
74.9
75.9
69.8
64.5
57.4
49.6
57.6
1950
47.8
45.2
41.:
44.0
52.8
63.5
72.4
72.2
70.4
64.7
57.8
48.8
56.7
1951
43.0
39.8
40.8
48.3
57.3
65.1
72.8
73.0
70.5
63.3
56.4
49.0
56.6
52
43.8
40.5
a.o
48.4
54.4
62.1
68.8
74.6
70.9
61.0
56 J
48.8
55.9
53
43.0
41.2
42.4
49.9
59.0
64.0
73.2
73.0
68.8
61.3
55.6
47.2
56.6
54
44.0
41.3
43.0
48.7
56.5
63.9
70.8
72.2
70.0
65.4
55.1
47.7
56.6
1955
a.o
38.4
40.6
45.2
54.4
63.3
73.0
74.2
71.7
64.5
58.7
48.4
56.1
1956 39.3 38.6 39.6 44.0 51.6 64.1 70.0 72.2 70.2 - - - -
(9) (9) (9) (9) (9) (9) (9) (9) (10) (9) (9) (9)
Mean 42.8 40.7 41.3 46.6 54.8 63.8 71.9 73.1 70.6 63.6 56.9 48.5 56.2
Readings at 0130, 0730, 1330 and 1930, EST
Source - NWRC
70
Monthly and Annual liean Sir face Water Temperatures, "-F
FOURTEEN :
FOOT BANK
39°03'N.
75°11'W
•
Year
Jan.
Feb.
Mar.
Apr.
May
June
July
Aug.
Sept.
Oct.
Nov.
Dec.
Ann.
1878
.
_
.
74.8
73.2
63.0
51.6
42.9
_
79
-
-
39.0
-
59.3
68.7
72.8
73.7
69.1
65.2
50.0
43.3
-
1880
U.l
40.4
43.1
48.9
61.7
71.0
75.5
74.4
71.8
61.8
49.6
36.8
56.3
1881
_
_
38.9
43.6
59.7
68.2
75.5
75.5
75.7
66.9
56.0
44.5
_
82
38.4
37.8
a.i
-
55.7
67.3
73.2
73.4
71.2
63.6
51.6
37.2
-
83
-
-
36.9
46.4
56.5
68.9
74.5
72.0
67.3
59.2
48.9
40.5
-
84
-
-
37.0
46.7
57.3
61.9
72.8
73.2
71.4
63.2
49.8
40.1
-
1885
-
-
-
-
-
68.3
73.7
77.1
70.8
63.0
52.1
40.1
-
1886
_
_
_
49.6
58.0
66.5
74.2
74.1
73.5
64.7
51.9
59.8
«
87
-
-
-
-
59.8
68.6
77.0
76.3
68.8
60.6
48.9
41.1
-
88
33.0
31.8
34.4
45.5
56.1
68.7
-
75.6
69.0
56.6
52.7
40.2
-
89
39.6
34.8
37.5
47.0
59.2
67.5
72.3
71.0
67.4
55.9
49.4
43.7
53.8
1890
43.2
43.2
41.8
50.5
61.8
72.7
76.1
-
76.2
59.5
50.1
39.7
-
1891
35.1
38.6
39.2
49.1
57.6
68.1
73.1
74.8
72.1
62.1
49.0
42.3
55.1
92
36.8
35.0
-
-
58.2
71.6
72.9
76.0
71.1
60.5
48.1
37.9
-
93
30.5
31.4
36.2
46.8
57.4
67.7
73.9
74.3
70.9
62.2
50.8
40.8
53.6
94
39.0
-
-
48.0
61.3
68.5
73.4
72.3
72.8
62.7
50.8
42.4
-
1895
-
-
-
46.8
-
69.2
73.5
74.2
72.6
60.4
50.2
41.0
-
1896
34.9
35.4
35.9
45.4
60.8
68.8
74.6
74.8
70.2
59.3
52.9
41.8
54.6
97
35.2
32.9
40.4
48.9
59.3
66.2
74.8
75.2
72.0
62.4
52.2
42.2
55.1
98
37.4
35.2
42.6
48.2
56.4
67.8
73.7
77.5
71.8
64.7
51.4
39.1
55.5
99
35.5
31.2
37.4
46.6
59.3
68.5
72.4
44.7
72.4
62.2
53.3
44.0
54.8
1900
35.6
33.7
36.2
45.9
58.9
67.8
75.0
76.7
75.0
65.0
53.9
42.3
55.5
1901
35.2
30.8
35.2
45.1
55.5
66.2
74.7
77.0
73.0
62.4
50.0
38.3
53.6
02
34.0
30.8
39.1
47.0
59.4
66.2
71.9
74.4
70.8
64.2
55.4
42.8
54.7
03
35.6
36.0
44.2
49.9
60.1
66.5
73.5
73.4
71.4
61.9
50.4
37.4
55.0
04
31.1
30.4
-
44.2
54.8
66.1
73.3
73.7
69.7
60.1
48.7
36.7
-
1905
32.4
29.0
36.6
47.0
58.7
68.0
74.6
74.2
70.8
63.0
49.7
40.8
53.7
1906
38.2
35.4
37.2
47.8
57.6
67.6
73.5
75.9
72.2
61.8
49.2
39.2
54.6
07
36.0
30.6
37.2
44.0
54.6
60.9
71.9
72.4
70.8
59.1
48.1
40.2
52.2
08
38.5
33.0
39.7
48.8
59.3
70.3
73.7
73.6
68.0
63.1
51.4
43.4
55.2
09
37.6
38.7
42.0
48.4
59.4
68.3
71.3
-
69.6
59.7
51.0
39.3
-
1910
31.1
33.0
40.1
51.5
58.5
64.0
72.5
71.6
71.5
64.1
49.6
38.0
53.8
1911
37.9
39.8
42.1
49.4
62.2
72.3
76.4
75.8
73.0
63.9
53.0
47.1
57.7
12
37.7
34.8
41.9
52.7
62.5
70.0
75.7
75.2
73.0
64.5
55.8
46.2
57.5
(26)
(25)
(27)
(29)
(32)
(34)
(33)
(33)
(35)
(35)
(35)
(35)
Mean
36.2
34.5
39.0
47.6
58.6
67.9
73.9
74.5
71.4
62.1
51.1
41.5
54.8
Readings at first high water and first low water after 7 a.m.
Source - USCFF
71
Monthly and Annual Mean Surface Water Ten^ratures, °F
DELAWARE BREAKWATER, DELAWARE 38°47'N. 75°06«W.
Year Jan. Feb. Mar. Apr. May Jiine July Aur. Sept. Oct. Nov. Dec. Ann.
1880 - - 43.4 48.3 61.3 68.5 72.7 72.6 70.9 63.0 - 37.6 -
81 32.8 34.8 40.8 45.7 - 66.8 73.1 73.2 74.4 - 57.1 47.2 -
82 40.8 - - - 55.2 - 69.5 71.9 71.7 64.8 52.4 40.0 -
83 35.4 37.6 39.4 47.8 57.1 65.9 72.3 71.8 68.9 62.1 52.0 44.0 54.5
84 35.8 38.9 39.6 - 57.9 67.1 73.3 - 71.7 65.3 54.9 -
1885 38.5 32.6 - _-_--- .-_-
(5) (4) (4) (3) (4) (4) (5) (4) (5) (4) (4) (4)
Mean 36.7 36.0 40.8 47.3 57.9 67.1 72.2 72.4 71.5 63.8 54.1 42.2 55.2
1880-June 1881, incl., readings at 3 p.m.
July 1881 etc., readings at 2 p.m.
Source - DSCFF
72
o
Uonthly and Annual Uean Surface V/ater Teiq>eratures, F
o o
OVERFALLS LIGHTSHIP 38 il*7.9'N. 75 01.4'W.
Year Jan. Feb. Mar. Apr. May June July Aug. Sept. Oct. Nov. Dec. Ann.
1905 - - 32.7 A1.6 54.4 65.0 69.2 70.3 69.6 64.2 52.0 44.0 -
1906 40.8 37.6 39.1 - - 63.4 69.9 73.1 70.9 63.5 51.5 41.8 -
07 38.3 31.4 - 44.1 51.7 - - - - - - 39.3 -
08 37.4 32.0 36.1 43.6 53.7 65.6 66.6 70.3 68.0 62.7 50.6 42.8 52.4
09 38.8 38.7 41.0 ------ ___-
(4) (4) (4) (3) (3) (3) (3) (3) (3) (3) (3) (4)
Mean 38.8 34.9 37.2 43.1 53.3 64.7 68.6 71.2 69.5 63.5 51.4 42.0 53.2
Readings at first high water and first low water after 7 a.m.
Source - DSBF
73
o
Monthly and Annual Mean Surface Water Temperatures, F
WINTER QUARTZh 3II0AT, LIGHTSHIP
0 0
37 57'03"N. 75 05'29"W.
Year
Jan.
Feb.
Mar.
Apr.
May
June
July
Aug.
Sept.
Oct.
Nov.
Dec.
Ann,
1878
79
1330
37.0
h6.0
35.6
U5.U
UO.2
li6.0
kS,6
h8.5
55.3
60.3
62.9
67.8
75.9
71.8
70.2
73.6
73. I4
68.2
72.0
66.7
67.0
67.0
55.9
55.6
57.5
Ii7.9
50.U
li3.9
?5U.9)
58.6
1331
82
83
8U
1835
UU.O
39.U
30.6
36.0
33.3
1^2.3
37.3
36.9
38.0
1^3. U
ltO.9
37.2
U2.8
ii7.2
Uh.6
h2.9
5ii.o
52.6
52.5
5U.6
65.3
62.U
6U.2
61.U
73. I4
69.6
70.2
66.3
71.U
75.8
71.2
71.0
73.2
72.5
68.3
71.9
67.2
62.8
61.3
66.2
62.0
55.U
50.0
53.8
52.3
Ui.3
kl.k
U3.7
(56.1)
56.0
53.5
53.0
1036
87
88
89
1390
39.0
39.3
U2.2
U8.0
39.3
35.6
39.6
I45.5
39.2
36.0
38.9
U3.2
U3.2
h3.7
U7.7
56. I4
52.5
56.5
55.6
63.9
65.5
62.8
67.I4
73.0
73.6
70.5
69.5
72.2
72.7
7ii.l
65.6
70.U
72.6
70.0
68.3
69.5
66.3
6U.0
60.0
62.9
57.7
53.9
5i;.6
5U.1
51.6
U6.2
U6.1
h3.1
U9.2
h6.2
'55.2
(5h.o)
(5h.)4)
56.9
1391
92
93
9U
1895
UO.3
U3.0
33.5
U3.1
U0.7
hl.O
33.2
33.3
U0.)4
3ii.7
U0.7
38.5
36.1
li3.2
37.9
I16.7
hh.2
Ii2.6
U6.7
h5.U
5h.3
5h.5
53.3
57.7
52.9
6U.8
65.0
6U.8
65.0
65.8
70.5
65.9
71.2
67.6
72.9
7U.U
76.5
73.3
69.6
72.U
72.2
71.7
70.3
72.0
72.9
6U.li
63.6
65.0
62.9
53.3
5U.)4
55.8
55.6
^5.6
U8.6
li3.7
U7.1
U7.2
U6.7
(55.9)
55.0
53.9
56.1
55.1
1896
97
40.5
39.2
37.9
44.7
57.2
66.4
69.1
73.1
69.9
61.9
57.2
-
(55.3)
7 (
98
99
-
39.2
42.4
47.0
53.1
54.3
63.8
66.5
72.9
68.9
72.3
72.7
70.2
72.9
66.1
64.1
56.6
57.4
45.8
50.1
(55.8)
(55.9)
Mean
(16)
kO.2
(17)
38.7
(17)
40.0
(16)
45.2
(18)
54.9
(18)
64.8
(18)
70.7
(19)
72.2
(19)
71.2
(18)
64.4
(20)
55.6
(19)
46.5
55.4
Readings at first high water and first low water after 7 a.m.
Source - DSCFF
74
o
Monthly and Annual Mean Surface vVater Temperatures, F
WINTER QUARTi-R LIGHTSHIP
0
37 55.5'
0
'N. 74 56.4'
w.
Year
Jan.
Feb.
Mar.
Apr.
May
June
July
Au^.
Sept.
Oct.
Nov.
Dec.
Ann.
1925
-
-
-
-
54.9
65.4
70.1
73.4
72.4
64.1
51.8
47.2
-
1926
27
28
29
1930
40.4
37.5
43.6
45.6
44.8
40.3
37.5
41.3
40.7
41.8
40.3
39.2
42.7
42.3
42.8
42.0
43.8
49.7
49.4
47.3
49.9
54.1
55.2
56.2
55.4
61.8
64.6
67.0
66.5
72.3
71.0
71.5
72.8
70.8
71.8
74.1
73.1
72.1
67.5
70.0
71.3
71.0
73.0
61.7
65.4
64.9
62.1
63.3
54.4
55.8
56.8
57.9
55.4
44.3
48.3
49.6
48.6
48.2
(53.9)
54.8
57.1
57.1
57.0
1931
32
33
34
1935
41.7
47.5
42.9
44.0
42.8
39.4
43.7
38.7
38.7
38.4
35.8
39.9
38.4
36.4
39.7
40.3
43.5
42.9
42.0
43.6
49.5
51.9
53.0
52.2
52.4
60.2
62.2
62.4
64.3
63.1
70.6
68.7
65.8
74.4
71.5
71.8
72.0
71.3
69.8
73.3
68.0
68.6
72.2
70.4
70.9
62.5
66.7
65.5
65.3
63.0
58.3
56.6
55.7
56.6
58.0
50.4
44.8
48.1
48.8
48.5
54.0
55.5
54.7
55.2
55.4
1936
37
38
39
1940
40.8
46.8
43.6
45.9
a. 9
42.3
42.1
43.7
37.1
37.1
42.1
42.6
44.6
39.6
45.2
45.4
48.5
48.4
43.4
56.5
56.1
55.8
53.0
52.7
66.7
67.6
64.1
66.5
64.6
72.1
74.9
69.9
70.2
74.5
74.6
73.9
76.0
70.1
69.4
69.5
72.7
65.4
62.3
62.1
66.9
58.0
55.7
57.6
57.7
48.5
46.7
50.8
49.6
(56.3)
57.0
56.7
57.9
Uean
(15)
43.3
(14)
40.4
(15)
40.2
(15)
45.0
(16)
53.7
(15)
64.5
(14)
71.1
(15)
72.8
(15)
70.5
(15)
64.2
(15)
56.4
(15)
48.2
55.9
Readings at 8 a.m. and 6 p.m.
Source - USBF
75
Monthly and Annual Mean Surface Water Temperatures, °F
CHINCOTEAGUE, VIRGINIA 37°52«N 75°23.5'W.
Year Jan. Feb. Mar. Apr. May June July Aug. Sept. Oct. Nov. Dec» Ann.
1880 > _ - - 72.2 79.5 82.4 79.4 77.6 67.4 51.9 38.6 -
1881 35.7 38.1 44.4 52.1 66.5 75.0 83.4 80.3 80.1 69.1 49.9 41.4 59.7
82 - - - - 60.6 - 78.0 78.3 74.8 66.3 50.9 39.3 -
83 35.4 43.8 43.3 53.0 64.5 76.0 80.1 77.8 71.1 62.9 52.4 43.0 58.6
84 36.7 42.4 44.4 51.0 64.3 - 76.1 77.0 76.1 67.2 53.3 44.2 (59.0)
1885 41.2 - 40.0 52.8 64.0 73.8 80.2 80.3 72.7 64.1 52.0 41.0 (58.6)
1886 34.3 35.7 43.4 55.4 63.8 74.6 79.6 77.8 76.0 65.8 53.1 39.0 58.2
87 36.4 43.8 43.1 ------ -__-
(6) (5) (6) (5) (7) (5) (7) (7) (7) (7) (7) (7)
Mean 36.6 40.8 43.1 52.9 65.1 75.8 80.0 78.7 75.5 66.1 51.9 40.9 59.0
1880-June 1881, incl., readings at 1 p.m.
July 1881 etc., readings at 2p.m.
Source - USCFF
76
Monthly and Annual Mean Surface Water Temperatures, °F
CAPE CHARLES LIliHT<^HIP 37°05'N. 750U'W.
Year Jan. Feb. Mar. Apr. May June July Aufi. Sept. Oct. Nov. Dec. Ann.
1925 - - - - 59.3 68.4 72.7 74.3 -73.6 65.1 53.5 45.8 -
1926 40.1 37.6 39.7 45-5 55.6 63.6 72.1 75.0 72.4 67.0 57.5 45.4 (56.0)
27 38.7 40.3 41.4 47.1 54.1 58.7 69.2 68.4 71.9 65.5 55.4 48.7 (55.0)
28 43.0 42.9 42.6 48.9 56.8 66.0 69.8 72.7 *
(3) (3) (3) (3) (4) (4) (4) (4) (3) (3) (3) (3)
Mean 40.6 40.3 41.2 47.2 56.4 64.2 71.0 72.6 72.6 65.9 55.5 46.6 56.2
* On 1 Sept. "28, the lightship was moved abcut 6 miles to the
southwest to 36°59'N. 75°42'W and the name changed to
Chesapecdce Lightship.
Readings at 8 a.m. and 6 p.m.
Source - USBF
77
Monthly and Annual Llean Surface VJater Temperatures, F
CHESAPE.4KE LIGHTSHIP
36°59'N 75°42'W
Year Jan. Feb. Mar. Apr. May June July Aug. Sept. Oct. Nov. Sec.
1928
29
1930
1931
32
33
34
1935
1936
37
38
39
1940
Mean
46.0 40.2
45.9 42.2
40.0 34.0
46.2 41.9
43.6 42.9
44.5 44.4
40.1 36.8
43.0
45.1
43.0 41.2 41.2
50.9 50.1 45.9
47.0 44.1 44.3
45.7 37.9 37.5
41.7 37.4 43.2
39.5
43.1
44.8
47.3
38.8
51.6
50.8
48.0
50.0
51.6
44.6
46.9
48.6
48.3
51.6
52.2
46.1
60.2
60.6
57.9
58.1
61.6
55.2
58.0
61.6
60.8
61.5
59.6
56.2
(12) (12) (12)
44.6 41.1 42.8
(12) (12)
49.2 59.3
67.9
69.0
67.2
69.1
69.2
67.3
67.1
67.7
69.7
68.4
69.8
70.5
(12)
68.6
72.2
73.8
74.1
74.1
73.2
76.5
72.1
74.9
75.2
73.1
71.8
75.1
74.0
74.5
75.2
77.1
71.7
73.5
75.4
73.4
74.4
78.0
70.7
73.2
74.6
73.7
71.9
76.7*
73.0
70.9
70.7
70.4
73.1
73.9
(11) (11) (12)
73.7 74.8 72.7
68.0
65.5
66.6
67.7
67.4
68.7
66.5
64.6
67.3
63.8
64.5
67.9
(12)
66.5
58.5
59.2
56.5
60.6
59.9
57.1
56.5
57.6
58.0
56.4
58.2
56.2
(12)
57.9
50.2
50.0
48.4
55.6
49.2
50.1
47.6
46.2
47.0
47.0
49.6
47.2
(12)
49.0
Hnn.
58.7
59.0
58.7
60.2
60.0
56.7
56.6
57.0
58.0
58.8
59.4
58.4
*Sept. 16, 1933. Hurricane - worst storm in 25 years.
Readings at 8 a.m. and 6 p.m.
Source - USF
78
0
Monthly and Annual Mean Surface Water Temperatures, F
o o
CHESAPEAKE LIGHTSHIP 39 59'7"N. 75 U2'W.
Year
Jan.
Feb.
Mar.
Apr.
May
June
July
Aug.
Sept.
Oct.
Nov.
Dec.
Ann,
19U7
U8
h9
1950
Ui.U
U5.6
U9.6
38.8
U6.9
U2.5
50.2
60.7
60.6
51.1
69.3
69.U
60.1
76.2
77.6
62.8
71.7
7a.8
65.2
78.0
73.ii
70.7
68.3
63.8
68.6
67.U
59.0
59.U
60.3
55.2
50.U
50.2
U7.3
58.1
(59.6)
(56.3)
1951
52
53
5U
1955
li3.9
11.6
U6.2
U5.2
hh.O
UO.6
U3.7
U5.0
h3.6
39.3
U3.0
li8.0
H6.2
Uh.8
51.7
51.0
53.2
51.6
60.2
60.2
63.6
60.6
57.9
67. U
72.2
68.7
71.2
6U.0
73.0
77.1
76.9
75.8
73.5
72.0
75.3
77.6
7U.0
79.5
68.2
■fh.2
60.2
58.0
57.3
50.2
U9.0
(57.5)
(59.2)
(59.5)
(58.7)
1956
38.3
ho. 6
U3.U
U7.6
56.0
69.0
72.3
7I4.9
71.2
-
-
-
-
Maan
(9)
Uju.o
(8)
U2.3
(6)
UU.6
(6)
50.9
(9)
59.0
(9)
67.8
(9)
73.9
(9)
73.9
(7)
72.1
(U)
65.0
(5)
58.9
(6)
50.5
58.6
Readings at 0130, 0730, 1330 and 1930, EST
Source - NWRC
79
o
Monthly and Annual Mean Surface Water Temperatures, F
o o
BALTIMORE, MARYUND 39 16'N. 76 35 'W.
Year Jan. Feb. Mar. Apr. May June July Aur. Sept. Oct. Nov. Dec. Ann.
1873
74
1875
-
-
-
-
-
-
-
79.4
-
-
-
-
-
-
-
-
-
-
1876
77
78
79
1880
37.8
33.8
a.i
39.2
34.9
41.2
41.2
48.7
41.5
45.2
50.8
48.8
53.0
61.0
65.8
66.0
66.8
74.0
70.9
73.7
80.3
79.5
78.6
80.2
79.0
78.6
75.0
72.0
73.4
1881
82
83
84
1885
33.3
33.4
33.3
35.2
34.2
37.2
35.4
37.0
33.1
37.5
41.1
40.2
35.6
45.6
50.4
49.7
58.6
62.8
63.6
62.9
72.4
73.7
75.2
72.2
79.0
79.1
80.3
77.4
78.9
80.7
78.7
77.1
78.1
79.7
78.6
74.2
70.1
72.8
1886
87
34.9
34.8
34.9
39.1
39.4
40.8
54.7
62.6
71.8
76.0
77.9
76.0
Mean
(9)
35.3
(10)
36.6
(10)
41.1
(7)
50.4
(9)
63.3
(8)
73.0
(9)
78.8
(10)
78.9
(8)
74.0
Foot of South Street
1873-Oct. 1879, incl., readings at 3 p.m.
Nov. 1879-June 1871 incl., readings at 1 p.m.
July 1881 etc., readings at 2 p.m.
Source - USCFF
65.9 - 43.3 -
65.4 51.1 41.6 -
67.3 49.2 42.6 (57.3)
64.0 50.0 37.9 58.6
71.2 56.9 - (57.8)
66.0 54.0 37.5 (57.1)
50.2 41.8 (57.0)
67.4 51.5 - (57.2)
63.7 53.2 40.3 56.4
66.6 52.9 37.5 57.1
(9) (9) (8)
66.4 52.1 40.3 57.5
80
Monthly and Annual Mean Surface .later Temperatures. F
WASHINGTMI,
D.C.,
POTOMAC
RIVER
0
38 53'N.
0
77 Ol'W.
Year
•Jan.
Feb.
Uar.
Apr.
Uay
June
Jul£_
Aug.
Sept.
Oct.
Nov.
Dec.
Ann.
1882
45.2
53.5
59.8
76.0
79.5
77.7
71.5
61.4
48.8
33.9
_
83
33.4
37.1
39.7
52.2
64.3
77.6
81.2
77.3
68.2
59.9
46.2
37.5
56.2
84
33.1
40.0
42.5
51.1
66.1
73.5
74.5
77.4
74.3
64.9
44.8
39.0
56.8
1885
34.0
35.6
53.5
65.3
74.4
81.9
78.6
70.8
59.4
47.3
35.3
(56.0)
1886
^
^,
42.2
56.1
65.2
72.9
77.6
77.8
76.5
64.4
48.4
-
(57.6)
87
_
38.0
39.6
52.1
69.0
75.3
84.1
79.7
70.8
61.0
46.1
-
(57.4)
88
_
.
53.9
67.1
76.8
80.4
80.8
71.4
58.9
51.6
38.4
(57.8)
89
35.5
_
41.2
59.1
68.7
73.5
80.8
76.9
72.3
59.1
50.0
64.1
(58.2)
1890
44.7
42.1
44.7
57.4
57.7
78.7
82.3
80.0
75.1
64.1
50.9
37.1
59.6
1891
35.8
43.0
43.2
57.0
66.6
72.3
78.4
81.3
75.4
61.8
46.9
37.4
58.2
92
34.8
36.0
39.3
50.6
65.7
78.8
81.6
82.0
72.6
62.2
47.9
36.9
51J*
93
.
38.9
56.0
63.5
77.6
82.4
78.9
70.4
59.7
44.1
36.3
(56.7)
94
36.8
35.6
44.8
54.4
68.8
75.9
82.2
78.7
75.7
60.4
46.3
38.8
58.2
1895
-
38.8
53.9
66.2
77.7
79.1
80.2
76.1
54.7
48.5
38.9
(57.2)
1896
35.8
36.6
36.1
55.2
69.9
73.4
81.1
80.6
69.8
57.1
50.3
37.6
57.0
97
34.9
42.9
57.2
66.2
-
-
-
-
63.1
49.7
39.1
-
98
35.8
35.4
47.7
54.4
64.6
77.6
84.0
80.9
75.8
64.6
48.1
35.9
58.7
99
34.9
41.0
53.4
68.7
78.3
80.9
80.3
74.5
62.3
51.2
40.9
(58.6)
1900
34.5
35.1
39.2
54.3
68.8
76.5
83.5
78.1
74.9
64.5
52.6
39.9
58.5
1901
34.9
^
40.9
49.9
65.3
73.2
82.6
79.7
72.2
60.0
47.0
36.0
(56.6)
02
•
41.0
54.9
69.1
75.4
80.4
78.4
72.1
62.8
53.3
39.6
(58.3)
03
33.3
35.5
49.0
58.3
66.8
72.0
79.0
76.4
72.7
59.8
46.6
-
(57.3)
04
-
-
37.4
50.5
65.9
74.2
77.9
77.4
73.8
-
-
-
-
1905
-
-
37.3
52.9
67.0
75.0
81.5
79.2
72.2
64.1
44.5
35.6
(56.8)
1906
35.5
_
35.9
48.2
65.3
72.5
77.5
78.4
72.1
64.4
51.1
37.7
(56.3)
07
35.0
-
40.3
52.3
63.7
—
~
"
~
"
^
^
^
(15)
(13)
(25)
(26)
(26)
(24)
(24)
(24)
(24)
(24)
(24)
(21)
Mean
35.6
37.2
41.0
53.9
66.0
75.4
80.6
79.0
73.0
61.4
48.4
37.9
57.6
nth street .Vharf and 12th Street '.Vharf
Readings at first high water and first low water after 7 a.m.
Source - USCFF
81
Monthly and Annual Mean Surface Vifater Taupe ratures, °F
FORT WASHINGTON, MD., POTOMAC RIVER 38°42'45"N. 77°02»15"W.
Year
Jan.
Feb.
Mar.
Apr.
May
June
July
Aug.
S«s)t.
Oct.
Nov.
Dec.
Ann.
1885
-
-
-
-
-
-
80.4
78.7
72.3
62.5
48.1
35.2
-
1886
87
88
89
1890
33.7
33.0
32.9
38.7
40.5
33.5
41.2
34.1
34.7
41.6
42.3
40.4
38.5
43.4
42.8
55.8
52.9
53.8
54.4
55.9
65.6
70.0
65.8
67.5
66.1
74.1
76.7
77.8
73.7
78.5
78.4
83.7
76.7
78.7
80.0
78.8
81.2
80.3
74.5
79.6
76.2
71.8
70.0
69.0
74.2
65.8
61.6
56.7
56.4
59.2
50.1
46.8
50.3
47.9
48.9
33.4
40.2
37.2
40.8
36.3
57.3
58.3
56.2
56.6
58.6
1891
35.8
43.1
41.9
56.9
65.3
73.7
78.6
79.4
76.1
61.8
48.1
40.7
58.4
92 35.6 38.0 -_-_-__ ____
(7) (7) (6) (6) (6) (6) (7) (7) (7) (7) (7) (7)
Mean 35.7 38.0 41.5 55.0 66.7 75.8 79.5 78.9 72.8 60.6 48.6 37.7 57.6
Readings at first high water and first low water after 7 a.m.
Source - DSCFF
82
Monthly and Annual Mean Surface Water Temperatures, °F
BRYANS POINT, MD. 38°41'45"N. 77O04'10'",V.
Year Jan. Feb. Mar. Apr. May June July Aug. Sept. Oct. Nov. Dec. Ann.
1892 - - - - - 78.9 80.2 82.9 72.6 61.2 46.7 36.1 -
93 32.0 32.9 40.6 52.7 61.4 75.2 80.9 79.7 70.6 61.7 46.3 36.9 55.9
94 37.8 - 47.4 54.3 68.7 75.2 82.0 80.1 78.0 62.0 48.4 39.2 (59.0)
1895 33.8 32.3 41.4 54.7 65.6 78.9 80.0 81.0 78.1 60.4 49.0 39.0 57.8
1896 35.3 37.2 37.5 56.4 71.2 76.1 79.5 81.8 - 57.2 52.2 - (58.1)
97 34.3 36.9 45.6 55.1 64.8 72.8 81.8 80.4 71.5 64.2 49.9 39.2 58.0
98 35.5 35.4 46.7 52.6 64.7 78.9 81.8 79.7 76.3 65.4 47.1 35.0 58.2
99 35.4 32.8 - 54.8 67.5 77.4 81.2 - 73.8 61.8 - 39.1 (58.0)
1900 34.9 34.3 38.4 54.1 67.5 76.7 81.4 81.8 77.8 66.0 51.7 36.5 58.4
1901 35.6 32.7 42.2 48.3 64.2 - 83.2 - - 59.5 42.8 - (56.5)
02 33.7 - - - 68.0 76.8 - - - _ _ _ _
Mean
1892
1902
(10) (8) (8) (9) (10) (10) (10) (8) (8) (10) (9) (8) (9)
34.8 34.3 42.5 53.7 66.4 76.7 81.2 80.9 74.8 61.9 48.2 37.6 57.8
Readings at 6 a.m. and 12 m. and 6 p.m.
Source - U3CFF
83
o
Monthly and Annual Mean Surface Water Temperatures, F
POINT LOOKOUT, MARSflAND
38°02.3'N.
76°19.3«W.
Year
Jan.
Feb.
Mar.
Apr.
May
June
July
Aug.
Sept.
Oct.
Nov. Dec.
Ann,
1385
37.8
3U.2
-
U2.9
62.3
76.7
81.8
81.2
73.6
62.5
50.U 39.0
(56.)4
1886
87
83
89
1390
3li.O
33.U
36.2
36.6
32.8
36.8
36.0
35.2
Ui.3
36.6
39.7
35.8
35.2
li3.1
U6.6
Ui.2
li6.0
hh.7
58.5
60.6
57.1
62.0
67.9
71.1
71.2
69.6
65.0
77.2
78.2
76.14
78.U
83.0
80.0
7U.1
70.1i
7U.5
70.8
72.2
71. )4
71.2
67.0
56.9
59.2
62.6
52.6 39.5
U8.0 ao.7
52. h 39.2
53.3 U7.2
53.6 39.2
55.5
55.3
55.1
(U)
(6)
(6)
(5)
(6) (6)
78. b
77.8
72.8
61.6
51.7 UO.S
1391 35.6 35.5 37.0 -
(6) (7) (7) (5) (5) (6)
Mean 35.6 36.U 37. b liU.9 60.1 70.2 78. U 77.8 72.8 61.6 5l.7 UO.S 55.6
Potomac River mouth.
Readings at first high water and first low water after 7 a.m.
Source - USCFF
84
o
Monthly and Annual Mean Surface rtater Temperatures, F
VraNOUILL POINT, RAPPAHANNOCK RIVER
0
37 35.8'N.
0
76 14.2'W.
Year
Jan.
Feb.
Mar.
Apr.
May
June
July
Aufi.
Sept.
Oct.
Nov.
Dec.
Ann.
1882
a. 5
42.2
45.8
53.4
61.4
72.3
78.4
79.4
75.8
67.3
55.3
42.3
59.6
83
38.2
41.9
43.4
51.9
61.5
70.9
76.5
73.8
66.7
57.4
48.4
39.4
55.8
84
31.9
34.9
37.2
48.4
63.4
70.8
75.9
77.5
75.5
67.5
-
-
(56.4)
1885
-
34.9
36.3
47.4
61.0
72.7
79.2
80.4
72.7
64.4
53.4
42.1
(56.8)
1886
34.8
33.9
39.4
51.9
63.2
72.1
78.1
78.1
75.6
68.6
55.0
40.8
57.6
87
34.3
39.0
a. 6
46.6
63.4
72.9
80.8
79.6
71.9
62.7
50.8
42.2
57.2
88
37.2
35.0
37.9
48.8
61.5
73.6
77.0
80.0
72.9
60.0
53.6
41.5
56.6
89
41.0
38.1
40.1
50.6
65.4
73.3
78.1
77.4
71.6
59.2
53.8
47.1
58.0
1890
46.7
45.5
44.2
51.5
63.7
76.0
78.3
77.9
74.6
63.8
53.3
42.7
59.8
1891
.
.
42.2
52.7
61.3
71.9
75.7
79.2
75.2
63.6
51.3
_
(57.4)
92
39.4
38.3
40.9
48.9
63.6
74.3
77.6
81.4
73.4
63.6
52.2
U.2
57.9
93
31.2
34.2
39.0
48.6
61.4
74.0
78.4
78.3
74.3
65.0
52.3
44.6
56.8
94
42.0
40.2
46.0
50.2
64.4
73.1
77.9
77.2
76.6
65.4
54.4
45.0
59.4
1895
37.1
31.8
37.9
50.1
58.9
72.9
77.4
79.5
76.9
63.5
53.9
43.8
57.0
1896
37.5
39.1
39.7
50.5
66.9
73.9
80.5
81.2
73.8
61.2
55.3
42.7
58.5
97
39.1
37.4
43.8
52.9
61.7
71.7
79.2
79.2
76.9
65.1
55.4
46.1
59.0
98
39.8
38.7
45.2
48.4
56.5
71.4
78.0
80.8
76.3
67.3
53.4
a.7
58.1
99
39.2
33.6
40.5
49.9
62.1
76.4
77.6
78.1
74.2
63.8
57.0
45.0
58.1
1900
39.3
34.7
37.6
46.7
61.0
72.1
79.9
82.9
76.3
69.7
57.6
43.9
58.5
1901
37.9
34.5
38.1
.
_
72.4
81.5
80.6
75.4
64.9
53.9
39.2
(57.6)
02
34.9
31.4
39.2
47.8
-
-
77.6
77.1
72.7
66.7
-
-
(56.2)
03
36.4
36.7
43.9
51.2
60.2
68.7
78.1
76.7
73.3
62.7
49.6
38.3
56.3
04
33.0
31.5
37.4
47.1
62.1
72.7
75.7
78.2
74.8
61.6
51.1
38.8
55.3
1905
34.7
31.0
38.9
47.6
65.0
70.6
79.4
77.0
73.5
65.6
51.4
42.9
56.5
1906
40.2
35.9
38.9
48.7
61.6
71.9
76.8
78.4
76.8
68.6
51.5
41.9
57.6
07
39.8
33.8
40.2
45.5
56.4
62.9
76.7
75.0
72.6
52.9
47.7
40.3
53.6
08
37.6
-
43.6
54.1
64.5
71.7
78.3
74.6
69.4
59.1
46.9
U.2
(56.4)
09
37.5
U.6
u.o
54.5
61.9
74.3
77.1
74.4
-
56.3
51.2
36.6 (56.7)
1910
-
-
43.0
51.0
59.8
65.6
77.1
73.3
68.9
62.4
4A.2
34.6 (54.5)
1911
39.1
38.2
42.6
50.0
69.2
73.8
81.0
79.2
73.6
61.2
46.2
40.8
57.9
12
-
-
40.1
56.6
65.7
71.4
76.0
75.4
70.6
59.8
47.8
41.6
(56.6)
13
U.8
37.6
47.4
53.8
63.0
74.2
80.7
77.1
70.7
59.6
48.5
42.2
58.0
lA
38.9
36.3
37.1
48.3
64.2
72.9
78.0
78.3
71.1
64.7
52.0
41.4
56.9
1915
36.4
37.4
39.7
48.2
61.4
68.8
76.1
79.9
76.6
66.4
52.6
40.5
57.0
(Continued)
85
WINDMILL POINT, RAPPAHANNOCK RIVER - Continued
Year
Jan.
Feb.
Uar.
Apr.
May
June
July
Auk.
Sept .
Oct.
Nov.
Dec.
Ann.
1916
17
18
19
1920
37.3
36.8
29.9
38.2
32.4
37.4
34.2
31.8
37.9
33.1
36.9
39.8
42.5
44.3
37.7
47.5
49.1
50.8
49.9
48.6
62.4
58.3
63.6
61.5
57.9
70.7
69.9
71.1
72.2
69.8
77.6
76.1
73.4
74.9
74.8
78.1
78.4
77.6
76.3
75.4
72.6
69.^
71.1
72.2
72.1
62.4
59.5
62.9
67.0
64.3
53.2
48.8
52.8
53.0
52.5
42.0
36.3
44.2
39.6
43.2
56.5
54.7
56.0
57.2
55.2
1921
22
38.3
34.4
37.5
33.8
47.3
40.8
55.4
51.7
60.8
62.0
71.2
71.6
78.8
75.5
75.3
75.2
62.1
53.0
42.8
58.1
Uean
(37)
37.4
(37)
36.4
(41)
41.0
(40)
50.2
(39)
62.1
(40)
71.9
(41)
77.7
(40)
78.0
(39)
73.4
(40)
63.2
(38)
52.0
(37)
41.6
57.1
Readings at first high water and first low water after 7 a.m.
Source - USCFF, U3BF
86
Monthly and Annual Hean Surface V/ater Temperatures, F
STINGRAY POEJT LIGHT HOUSE, CHESAPFAKE 3AY, VIRGINIA
37°33.7'N. 76 16.2'W.
Year Jan. Feb. Mar. Apr. May June July Aug. Sept. Oct. Nov. Dec. Ann.
1862
U0.I4
1;1.6
U7.6
51.5
60.7
72.9
80.U
85.8
31.2
68.8
51.3
38.1
60.0
83
35.I4
35.1
U0.5
U8.3
63. U
75.0
80.5
78.U
72.1
6U.7
53.7
hS.h
57.7
8U
36.U
h2.2
Ul.l
52.7
65.2
73.0
77.1
78.. 4
76.3
69.2
55.0
UU.o
59.5
1835
39.5
36.1
33.6
50.3
61.8
73.9
76.7
81.3
77.5
70.7
5U.7
13.2
53.7
1336
33.3
3U.1
39.9
U7.6
.
73.3
78.5
73.1
75.0
66.9
5U.h
39.5
_
87
3ii.6
Ul.2
U2.8
U9.0
65.0
72.8
30.9
80.7
72.5
63.2
a9.6
li3.0
57.9
88
37.0
36.3
39.3
51.3
62.8
7li.6
73.1
79.3
73.9
60.7
51i.3
U2.O
57.7
89
U1.6
38.3
Ul.3
51.9
67.1
73.9
79.2
77.6
71.7
59.7
5U.0
U7.5
53.7
1390
hlJi
U6.)i
U6.U
53.8
65.0
76.9
79.0
78.3
75.3
6U.1
53.1
U2.7
60.7
1891
33.6
U3.1i
U3.1
53.1
62.1i
72.8
76.7
78.9
75.2
6U.2
U8.1
Uii.3
58.!i
92
39.6
37.2
ho. 2
50.6
63.5
7h.9
77.3
81.1
73.U
63.1
51.1
Ul.O
57.8
93
31.9
ho. 7
52.1
63.0
7U.1
78.7
73.6
73.5
6U.6
52.5
U2.5
-
9h
Ul.U
hO.2
U6.5
52.U
66.8
72.6
78.6
77.3
75.6
6U.7
53.0
li3.7
S9.h
1895
36.9
33.3
Ua.U
50.3
61.7
7U.6
77.3
7?.l
77.5
61.6
52.1
U2.5
57. h
1396
36.8
39.0
U0.5
51.8
67.6
7U.3
79.1
81.0
72.7
61.1
55.U
U2.9
58.5
97
37.0
37. I4
U5.2
53.8
63.7
72.2
79.6
79.7
7U.9
65.1
5U.U
hh.3
59.0
98
39.3
33.2
h5.9
52.1
61.5
73.1
78.7
80.9
76.0
67.7
53.3
U0.7
59.0
99
38.1
3li.9
Ul.l
51.2
6U.9
75.3
73.5
78.9
75.0
6U.8
56.2
U5.8
58.7
1900
33.0
36.7
UO.U
50.1
63.2
73.3
80.6
82.U
78.0
68.7
57.0
U5.0
59.lt
1901
39.1
3l;.8
Ul.3
U9.9
61.7
72.5
79.7
80.2
75.5
6U.7
51.U
39.8
57.6
02
35.U
33.3
U2.5
Sl.h
65.7
73.2
73.6
77.7
73.1
67.6
58.1
15.1
58.5
03
37. U
39.3
kl.B
5U.1
6ii.5
70.3
75.7
77.7
73.5
61.3
U9.5
35.9
57.5
Oh
30.3
29.8
37.3
U7.2
61.2
71.9
76.5
76.1
-
63.6
51.0
39.3
_
1905
35.0
30.6
hO.6
53.0
65.2
7h.6
80.U
78.1;
75.5
63.1
h9.2
hO.O
57.1
1906
37.3
35.5
33.5
U3.6
60.6
70.0
7h.8
77.U
7U.3
62.3
li9.7
39.9
55.8
07
37.2
31.6
39.6
U5.h
57.7
63.6
75.2
75.6
73.3
60.3
U8.6
hO.O
5^.0
08
37.7
32.9
Ul.U
5l.!i
60.U
71.7
76.6
75.3
63.7
61.6
U9.6
h2.5
55.3
09
37.9
39. U
U2.5
U9.9
61.0
70.6
75.3
7U.2
69.9
59.2
51.0
38.9
55.8
1910
33.0
33.3
Ul.7
53.2
60.3
67.6
76.3
75.6
72.3
6U.2
U7.0
35.0
55.0
1911
35.2
37.I4
UO.O
U7.)i
61.2
71.6
77.U
76.6
73.1
63.1
U9.6
Ul.2
56.2
12
32.3
30.7
37.2
50.9
62.1
72.3
73.8
77.0
75.7
66.0
5U.5
U5.2
56.9
13
lUi.8
U0.5
ii6.2
55.2
63.7
71.3
77.5
-
72.8
63.7
51.U
Uh.3
_
U^
33.0
37.2
36.1
U8.9
63.5
72.6
77.2
76.9
71.1
65.1
51.0
Ul.5
56.6
1915
37.1
38.0
U0.2
U9.U
63.1
69.5
75.9
78.7
7U.0
6li.l
52.8
39.h
56.8
87
STINGRAY POINT LIGHT HOUSE - continued
Year Jan. Feb. Mar. Apr. May June Jvly Aug. Sept. Oct. Nov. Dec. Ann.
37.7 39.6 36.9 U7.9 62.1 69.7 75.6 76.5 69.5 60.8 50.8 39.3 55.6
35.3 32.2 39.3 U8.3 56.5 68.U 7U.7 76.7 67.U 57.2 U6.5 35.1 53.1
3U.0 U2.6 U9.3 62.0 69.2 7U.3 73. U 71.1 63.6 5U.1 UU.U -
38.8 38.7 Uh.3 50.7 62. la 73.8 75.1 75.5 72.1 66.5 53.2 Uo.O 57,6
1920 32.7 33.0 38.3 50.0 58.1 70.2 7h.9 7U.5 72.U 6U.7 52.U h2.7 55.3
1921 38.1 37.9 U7.8 55.6 60.7 70.6 78.2 7U.2 7U.5 60.3 52. U b2.8 57.3
22 3U.1 33.!i UO.9 50.9 61.7 70.9 75.1 - - - - . _
(Uo) (Uo) (la) (Ui) (Uo) (Ui) (ia) (39) (39) (ho) (Uo) (Uo)
Mean 37.li 36.6 Ul.7 50.8 62.6 72.2 77.6 78.2 73.3 63.9 52.2 Ul.3 57.U
Mouth of Rappajianock River
Readings at first high water and first low water after 7 a.m.
Source - DSCFF, DSBF
88
o
Monthly and Annual Mean Surface VJater Temperatures, F
WOLF TRAP
BAR, CHESAPEAKi
! BAY
0
37 2li.2'N.
0
76 11.
h'W.
Year
Jan.
Feb.
Mar.
Apr.
May
June
July
Aug.
Sept,
Oct.
Nov.
Dec.
Ann.
1682
83
8U
1885
UO.6
35.8
36.2
38.6
lil.2
39.3
39.7
35.3
U5.3
U2.0
U2.U
36.8
51.6
U9.ii
50. li
U6.8
59.0
61.U
63.7
60.5
71.1
73.3
71.2
72.1
77.U
79.li
76.0
78.8
78.7
76.9
77.6
80.2
75.6
71.3
76.2
72.8
66.9
6U.2
68.7
65.0
5U.9
53.1
51.8
5U.5
U0.5
UU.9
hS.l
U2.6
58.6
57.6
58.5
57.0
1886
87
88
89
1890
35.0
3U.9
37.8
Ul.8
li7.9
33.9
39.8
36.0
39.0
U6.3
39.6
U2.3
39.1
U1.6
li5.h
52.6
us.u
li9.7
50.6
53.1
62.8
61.8
61.5
65.5
61i.2
71.3
72.8
73.7
72.6
76.2
77.7
80.1;
78.0
77.9
78.U
77.5
79.7
80.0
77.5
77.8
7li.7
72.2
73.6
71.7
75.2
67.1
63.6
60.5
60.2
6U.7
5U.8
50.1;
5U.7
5U.3
53.6
UO.7
U3.1;
U2.h
U8.2
U3.6
57.3
57.5
57.2
58.1;
60.5
1891
92
38.9
39.6
U2.9
37.3
U2.9
39.9
52.1
U9.0
62.0
62.U
73.1
73.U
77.0
79.1
81.2
7h.7
73.3
63.8
63.5
51.1'
51.8
Uli.5
Ul.7
(58.6)
57.5
Mean
(11)
38.8
(11)
39.2
(11)
Ul.6
(11)
50.3
(11)
62.2
(11)
72.8
(10)
78.1
(U)
78.7
(11)
73.8
(11)
6U.l!
(11)
53.5
(11)
U3.1i
58.1
Readings at first high water and first low water after 7 a.m*
Source - USCFF
89
o
Monthly and Annual Mean Surface 'Vater Temperatures, F
JAMES RIVER ;>T IHCHMOND 37°32'N. 77°27"ll,
Year Jan. Feb. Mar. Apr. May June July Aug. Sept. Oct. Nov. Dec. Ann.
1876 -------- 73.1 57.7 51.1 34.2 -
77 36.0 /i4.9 48.9 57.0 65. 1 79.2 83.6 82.6
Readings at 9 a.m., 3 p.m., and 6 p.m.
Source - 03CFF
90
o
Monthly and Annual Mean Surface Water Tenperaturee, F
o o
YORK SPIT LIGHT, VIRGINIA 37 12.6'N. 76 15.5'W.
Year Jan. Feb. Mar. Apr, May June July Aug. Sept. Oct. Nov. Dec. Ann.
1882
41.4
41.9
45.8
52.6
59.9
70.4
74.9
.
_
_
_
83
-
-
-
51.7
62.0
72.8
78.9
77.2
71.8
64.8
54.7
45.9
-
84
37.6
40.4
43.2
50.8
63.4
71.7
76.3
77.5
76.4
69.2
55.7
45.9
59.0
1885
40.2
36.4
37.7
48.5
61.3
72.8
78.7
80.0
73.5
65.6
55.3
43.1
57.8
1886
35.4
34.8
40.1
53.1
63.5
71.7
77.9
77.1
75.0
67.0
55.0
40.6
57.6
87
35.4
40.0
42.2
48.6
63.8
72.7
79.2
76.7
70.2
61.1
48.4
41.8
56.7
88
37.0
34.7
38.8
49.4
60.8
73.1
76.6
78.9
72.2
59.5
53.2
40.7
56.2
89
41.9
38.2
40.7
50.4
64.9
72.8
76.8
-
70.8
59.5
53.3
47.4
-
1890
47.0
45.5
44.4
52.7
63.6
75.0
77.2
76.4
73.9
63.9
53.1
43.0
59.6
1891
38.2
a. 7
42.5
51.9
61.8
71.7
75.6
77.9
75.0
63.5
50.8
44.8
58.0
92
40.3
37.6
39.7
48.8
61.8
72.6
75.6
80.6
73.8
63.4
51.2
41.7
57.2
93
30.9
34.6
39.3
49.9
60.3
72.1
78.0
78.0
74.9
65.2
53.4
43.9
56.7
94
42.0
40.3
45.6
50.8
65.6
70.7
76.2
75.6
75.5
65.2
53.7
44.6
58.8
1895
36.8
32.7
38.4
49.3
59.8
72.7
76.7
77.6
76.8
62.4
53.6
43.2
56.7
1896
37.0
37.9
39.3
50.5
65.8
.
77.4
79.2
72.3
61.4
56.1
_
—
97
-
38.1
44.7
53.2
62.5
71.3
79.7
79.2
75.8
-
56.9
46.1
-
98
40.3
39.3
45.7
52.2
60.8
72.2
79.1
81.0
75.0
68.3
54.8
42.2
59.2
99
39.2
-
40.5
51.1
64.2
73.5
77.1
77.5
71.5
61.8
53.0
44.6
-
1900
42.2
40.0
41.9
50.9
64.9
76.2
81.7
82.4
76.7
65.1
54.8
42.2
59.9
1901
38.8
34.4
45.8
50.1
62.1
74.3
82.2
77.6
72.6
59.2
44.3
41.2
56.9
02
35.1
34.1
44.3
53.8
66.6
75.0
80.0
76.5
71.5
64.6
56.7
42.3
58.4
03
37.4
41.5
50.3
52.4
64.8
68.8
78.5
77.1
72.8
60.6
48.8
36.9
57.5
04
31.5
30.6
36.7
47.0
60.4
70.9
74.8
75.0
71.7
61.7
49.6
38.7
54.0
1905
-
-
37.2
48.1
61.9
69.8
79.8
77.3
73.9
66.9
53.2
44.0
—
1906
41.3
38.1
41.7
50.1
62.0
72.2
77.5
79.2
75.9
66.5
53.7
44.5
58.6
07
41.2
35.6
a.5
47.2
59.4
66.7
76.2
77.4
75.8
63.4
51.7
43.5
56.6
08
41.9
36.7
45.0
54.4
63.5
73.4
75.9
74.1
67.0
60.8
49.0
42.7
57.0
09
38.9
39.4
42.1
52.6
61.7
70.2
71.8
73.0
68.8
59.4
51.5
43.3
56.0
1910
-
-
43.2
53.9
60.2
67.5
75.6
-
61.9
-
49.5
38.6
-
1911
37.9
40.1
42.4
49.7
63.0
73.4
79.2
78.7
76.4
66.8
53.7
45.4
58.9
12
-
33.0
39.6
52.3
63.7
70.9
77.0
76.4
75.5
66.0
"
43.2
~
(26)
(27)
(30)
(31)
(31)
(30)
(31)
(28)
(30)
(28)
(29)
(29)
Mean
38.7
37.7
42.0
50.9
62.6
72.0
77.5
77.7
73.2
63.7
52.7
43.0
57.6
Readings at first high water and first low water after 7 a.m.
SoTirce - U3CFF, USBF
91
o
Monthly and Annual Mean Surface Water Temperatures, F
NORFOLK, VIRGINIA 36°5l«N. 76°18»W,
Year Jan. Feb. Mar. Apr. Ifay June July Aug. Sept. Oct. Nov. Dec. Ann.
1873 -------- 7I4.9 63.2 a9.3 U5.9 -
7I; U3.3 Uli.9 50.3 55.3 66.1^ 80.3 80.3 79.1 76.5 66.5 - - (61.3)
1875 38.2 -------- -_._
1376
77
73
79
1880
35.6
37.6
U8.2
U2.9
U0.3
U9.1
50.1
51.9
50. I4
56.1
59.9
56.5
5U.U
6U.3
69.3
68.1
71.6
7U.0
73.9
77.5
77.2
80.1
85.1
80.9
81.2
79.3
79.5
70.6
81.5
73. U
76.1
62.5
65. '4
65.7
5U.3
52.3
51.0
li3.2
h3.5
U8.3
10.9
(59.9)
(62.1)
(60.7)
(62.U)
1881
82
83
1835
33.14
U2.9
38.);
37.5
U2.7
liO.5
U5.8
U8.9
h7.2
38.3
U7.2
U7.1;
li9.0
li2.0
52. '4
58.0
5U.5
55..U
69.9
65.5
68.0
68.3
65.1
77.3
73.6
7U.5
75.9
83.8
80.8
82.3
77.9
81.7
8l.li
81.7
79.3
79.0
81.6
80. I4
76. I4
71.5
73.5
72.2
67. U
6I4.2
67.3
6I4.U
58.8
53.9
55.U
55.3
5U.li
U6.U
U0.)4
U5.2
62. U
(61.3)
(61.3)
(60.9)
60.0
1386
87
37.6
37.5
39.1
U5.2
U5.)i
U6.6
56.3
65.3
7U.'4
79.0
78.3
7li.9
66.7
55.1
37.7
59.2
Mean
(12)
39.9
(11)
li3.8
(10)
U3.I4
(10)
55.9
(11)
67.5
(10)
76.!i
(11)
81.2
(9)
80.0
(11)
75.)4
(11)
66.0
(10)
5U.1
(9)
U3.6
61.0
Elizabeth River at Boston Steamship Co. wharf,
1873-Oct. 1879, incl., readings at 3 p.m.
Nov. 1879-June 1881, incl,, readings at 1 p.m.
July 1881, etc., readings at 2 p.m.
Source - OSCFF
92
Monthly and Annual Mean Surface Water Temperatures, °F
BODY'S ISLA^D LIGHT HOUSE, OREGON INLET 35°49'o7"N. 75°33'49"W.
Year Jan. Feb. Mar. Apr. May June July Aug. Sept. Oct. Nov. Dec. Ann.
1880 ------- 79.4 79.0 69.0 56.4 A0.8 -
1881 39.3 - 50.6 53.4 67.9 76.9 89 .A - 82.4 69.1 61.0 50.0 (64.4)
82 44.5 53.6 60.5 - 67.6 76.5 85.5 88.0 78.4 67.7 60.9 39.3 (65.0)
83 40.9 48.2 51.8 62.7 66.1 78.5 85.7 76.6 71.8 62.5 62.6 - (62.6)
(3) (2) (3) (2) (3) (3) (3) (3) (4) (4) (4) (3)
Mean 41.6 50.9 54.3 58.0 67.2 77.3 86.9 81.3 77.9 67.1 60.2 43.4 63.8
1880-83
Readings at first high water and first low water after 7 a.m.
Source - USCFF
93
Monthly and Annual Mean Surface Water Ten^ratures, F
DIAMOND SHOAL UGHTSHIP
o o
35 05 'N. 75 20'W.
Year
Jan.
Feb.
Mar.
Apr.
May
June
July
Aug.
Sept.
Oct.
Nov.
Dec.
Ann.
1923
73.8
78.1
78.8
79.7
77.2
74.5
62.4
66.0
.
24
60.8
52.0
48.0
55.4
62.8
72.7
78.8
80.4
77.5
71.4
65.7
66.7
66.0
1925
58.1
65.1
65.1
63.9
70.7
78.6
81.0
81.3
81.5
74.5
70.9
69.8
71.7
1926
63.9
56.1
57.9
62.4
70.0
76.1
79.5
81.1
79.5
75.4
68.2
55.9
68.8
27
60.6
61.9
57.2
62.2
72.9
74.7
77.4
79.5
75.9
72.9
66.7
63.7
68.8
28
65.5
64.8
64.9
66.6
69.0
74.8
78.8
82.0
80.5
73.8
71.2
68.2
71.7
29
66.2
64.6
60.5
66.0
73.4
77.4
79.6
80.6
77.1
73.3
73.5
68.9
71.8
1930
69.5
67.4
66.9
68.7
72.6
74.1
80.3
79.5
77.8
67.5
62.7
-
(71.1)
1931
60.2
60.9
50.1
55.3
63.4
68.3
76.1
78.4
76.8
70.2
68.5
67.8
66.3
32
63.8
66.1
57.5
61.7
68.1
75.9
80.0
81.8
79.0
77.4
71.8
69.4
71.0
33
63.5
63.8
64.0
66.7
72.0
74.5
75.4
81.8
-
72.9
66.7
68.0 (70.6)
34
64.3
60.5
62.7
64.5
69.1
75.4
79.7
80.8
79.4
74.4
75.0
69.8
71.3
1935
67.8
63.8
67.2
65.8
-
79.4
79.6
-
72.7
70.9
62.7
55.9
69.8
1936
62.6
55.2
61.5
61.7
73.4
76.9
80.4
81.9
79.1
77.7
73.1
71.0
71.2
37
66.8
60.8
60.6
66.7
73.3
79.4
81.0
82.9
79.8
75.6
70.7
64.7
71.9
38
66.6
59.6
54.7
62.9
76.2
80.1
79.9
80.6
73.1
71.5
69.9 (70.5)
39
66.0
63.1
66.5
68.3
69.3
78.1
79.6
79.6
77.7
74.9
64.7
60.7
70.7
1940
53.8
50.0
48.8
55.1
64.8
76.4
-
-
-
-
-
—
"
1947
_
_
^
^
_
^
^
80.0
81.4
76.9
72.7
73.5
-
48
68.8
65.0
70.4
72.8
76.0
-
-
81.8
79.2
72.5
72.8
61.2 (73.0)
49
55.1
61.8
58.6
68.3
72.3
78.6
81.9
80.7
78.8
76.0
73.0
-
(70.9)
1950
-
67.2
69.7
71.8
75.6
76.9
79.3
75.8
71.8
68.8
63.3 (70.4)
1951
^,
^
61.7
67.6
67.8
75.9
81.0
81.0
78.9
72.2
69.3
67.4 (70.6)
52
.
.
60.3
63.0
68.6
73.1
79.8
79.4
76.9
69.8
66.6
58.4 (68.3)
53
.
^
58.2
67.2
72.4
75.7
76.0
77.1
75.8
72.9
64.4
62.3
(62.8)
54
.
.
67.0
71.4
74.8
80.4
81.8
83.8
81.8
79.4
70.5
69.1 (73.7)
1955
64.8
-
-
74.1
77.2
82.7
83.1
80.9
79.0
70.3
66.6 (72.1)
1956
49.1
62.5
62.2
-
-
76.9
79.9
77.6
77.3
-
-
-
-
(21)
(20)
(26)
(24)
(24)
(26)
(25)
(26)
(26)
(26)
(26)
(24)
Mean
62.8
61.2
60.8
64.7
70.7
76.2
79.4
80.6
78.4
73.9
69.0
65.8
70.3
1923- Ipr. 1928 incl., readings at 0000, 0400, 0800, 1200, 1600 and 2000 hours.
Source - USC&GS, 1955
May 1923-1940 incl., readings at 8 a.m. and 6 p.m. Source - USBF
1947-1956, readings at 0130, 0730, 1330 and 1930 EST. Source - NWRC.
%
Monthly and Annual Mean Surface Water Temperature, °F
CAPE LOOKOUT, N.C.
34037 1 20" N. 76°31'26"W.
Year Jan. Feb. ttar . Apr. Mcty June July Aug. Sept. Oct. Nov. Dec. Ann.
1879
.
70.0
a.o
58.6
80
57.8 56.8
58.6
62.9
69.7
-
80.9
80.1
78.2
69.9
60.1
49.9
(66.7)
1881
45.9 46.5
51.0
55.5
71.3
75.9
79.1
79.8
80.3
73.2
64.6
56.4
65.0
82
53.7 55.3
58.4
62.4
67.6
76.7
80.9
81.7
78.5
71.8
60.3
51.5
66.6
83
48.2 52.4
54.3
61.2
69.4
77.8
82.4
81.2
76.8
70.4
63.2
55.3
66.0
84
49.2 58.5
58.8
61.8
71.9
76.2
80.2
79.2
79.3
73.9
62.9
56.5
67.4
1885
51.6 49.9
52.1
-
64.9
73.4
77.8
78.2
71.7
64.0
55.6
46.8
(62.2)
1886
40.7 42.1
46.0
56.1
64.7
71.4
76.2
74.1
74.4
64.7
55.0
45.0
59.2
87
41.7 48.8
48.2
54.8
65.1
70.7
74.6
75.4
70.8
63.7
53.9
-
(60.1)
88
50.0 52.1
53.0
62.6
70.4
76.7
79.4
81.2
77.5
67.0
61.0
51.9
65.2
89
52.7 50.6
52.9
61.1
72.7
-
80.1
78.7
76.2
67.2
61.9
58.9
(65.7)
1890
58.7 60.1
58.5
62.0
72.5
79.6
80.6
79.8
78.7
69.8
61.1
52.5
67.8
1891
51.0 57.8
_
64.0
71.2
79.0
79.7
81.0
77.9
67.1
58.7
57.3
66.6
92
52.3 51.4
52.4
60.9
70.2
77.0
77.4
79.9
75.9
68.6
60.1
53.0
64.9
93
43.3 -
53.3
61.7
68.5
76.0
80.4
78.4
69.4
61.1
55.8
52.6
(62.7)
94
52.7 52.5
58.0
61.1
71.8
75.9
79.6
79.8
-
70.2
60.5
55.8
(66.2)
1895
50.7 44.8
52.9
59.9
67.6
73.2
77.8
79.4
78.6
68.4
61.3
53.2
64.0
1896
48.3 51.5
52.8
60.9
72.0
75.7
78.8
79.2
77.9
64.6
64.4
51.4
64.8
97
49.3 50.9
57.2
60.5
69.3
77.0
80.4
79.7
78.0
70.5
63.4
58.5
66.2
98
54.6 51.9
58.9
62.4
70.1
75.2
80.6
80.2
77.2
72.7
62.3
53.4
66.6
99
54.9 52.2
58.2
59.1
68.1
77.1
79.1
80.2
-
69.7
64.6
55.2
(66.2)
1900
52.4 48.2
56.1
61.6
-
—
-
-
-
-
-
-
(21) (20)
(20)
(20)
(20)
(18)
(20)
(20)
(18)
(a)
(21)
(20)
Mean
50.5 51.7
54.6
60.6
69.4
75.8
79.3
79.4
76.5
68.5
60.6
53.7
65.0
Readings at first high water and first low water after 7 a.m.
Source - US OFF
95
Monthly and Annual Mean Surface Water Temperatures, °F
CAPE LOOKOUT SHOAL LIGHTSHIP, N.C. 34°18.2'N. 76°24.2'W.
Year Jan. Feb. Mar. Apr. May June July Aug. Sept. Oct. Nov. Dec. Ann.
1925
-
-
-
70.6
76.1
79.8
80.0
79.9
74.9
67.7
63.1
-
1926
27
28
29
1930
60.1 55.5
59.2 63.3
58.2 58.1
60.7 62.0
65.1 59.5
55.1
61.7
61.5
61.2
59.1
57.5
60.5
62.0
69.1
65.6
68.6
66.7
69.8
73.5
71.2
73.4
74.9
75.3
76.8
75.3
78.4
77.2
77.3
80.7
80.2
80.6
79.1
80.0
80.6
79.5
79.1
76.6
78.8
78.3
78.8
74.1
72.3
76.4
71.5
71.8
65.0
67.0
65.0
69.4
62.9
60.7
64.9
64.1
63.6
63.4
67.3
68.6
68.9
70.6
69.4
1931
32
33
58.7 60.2
66.8 66.0
58.9 57.2
58.3
60.4
57.3
61.3
62.8
60.3
64.0
68.0
66.0
70.6
75.8
73.3
79.8
79.8
77.3
81.1
80.4
80.9
78.8
73.9
74.1
71.0
68.5
68.0
62.3
69.0
70.3
(8) (8) (8) (8) (9) (9) (9) (8) (8) (8) (8) (8)
Mean 61.0 60.2 59.3 62.4 68.7 74.6 78.9 80.2 78.9 73.6 67.1 63.8 69.0
Readings at 8 a.m. and 6 p.m.
Source - USBF
96
Monthly and Annual Mean Surface V/ater Tanperatures, °F
FORT llACON, N.C. 34°42'N. 76°a'W.
Year Jan. Feb. Mar. Apr. Uaif June July mxr. Sept. Oct. Nov. Uec. Ann.
1883 ------- 79.8 75.6 68.8 61.0 53.7 -
84 46.9 57.3 58.2 72.4 79.6 - - 78.8 72.4 72.4 61.9 -
1885 49.6 46.6 49.8 61.4 70.5 77.5 82.5 81.9 77.4 68.7 61.0 50.4 64.8
1886 45.0 46.6 51.2 63.0 - - 81.0 80.1 78.5 70.2 69.1 49.5 -
(3) (3) (3) (3) (2) (1) (2) (4) (4) (4) (4) (3)
Mean 47.2 50.2 53.1 65.6 75.0 77.5 81.8 80.2 76.0 70.0 63.2 51.2 65.7
Readings at 2 p.m., 75th meridian time.
Source - USCFF
97
0
Monthly and Annual Mean Surface Water Temperatures, F
BEAUTORT,
NORTH CAROLINA,
FISHERIES LABORATORY
0
34 42.5 'N.
0
76 41 'W
Tear
Jan.
Feb.
Mar.
Apr.
May
June
July
Aug.
Sept.
Oct.
Nov.
Dec.
Ann,
1913
14
1915
48.9
48.4
48.9
50.9
49.6
50.7
62.2
60.8
71.6
72.0
77.0
79.0
77.4
82.0
82.4
83.1
81.9
82.0
83.7
76.3
75.9
80.6
67.8
69.1
71.6
56.5
57.6
60.4
50.9
50.0
47.1
64.8
65.6
1916
17
51.4
50.7
50.5
47.8
52.2
56.3
61.3
64.0
72.7
68.9
79.2
78.8
82.4
82.6
82.4
82.6
77.2
68.4
60.1
51.1
65.7
18
_
_
-
_
-
-
—
-
-
-
-
-
—
19
1920
46.4
47.5
55.0
~
63.1
71.1
79.7
-
79.9
73.8
61.9
49.8
54.1
(64.9)
1921
22
23
24
1925
51.6
47.7
50.2
50.5
47.7
54.0
52.5
45.5
49.6
53.2
63.7
60.8
56.1
53.2
56.8
67.6
67.6
60.3
64.8
63.1
70.2
74.3
68.9
73.8
70.7
79.7
79.5
80.1
79.2
83.7
82.4
81.3
80.2
81.5
82.9
79.3
83.8
78.8
79.0
84.4
75.2
80.2
75.6
81.3
70.5
68.4
66.7
67.5
69.3
64.4
59.4
55.8
59.4
56.3
53.8
52.3
55.9
50.7
51.3
68.9
66.6
(65.3)
65.4
65.8
1926
27
28
29
1930
52.0
47.7
49.5
53.1
53.1
54.7
59.4
52.2
52.0
54.7
54.7
58.1
57.0
61.2
55.8
64.9
63.9
65.1
67.6
66.4
74.1
73.8
70.9
74.5
76.1
81.3
77.9
81.7
80.2
79.7
86.4
83.3
83.8
84.0
84.9
88.2
82.0
85.6
83.1
80.8
84.0
80.2
79.7
79.3
82.4
74.5
71.6
73.2
68.9
67.3
61.2
63.0
60.1
61.9
58.3
54.3
55.8
52.7
52.9
48.9
69.2
68.1
67.6
68.2
67.4
1931
32
49.1
59.5
51.1
58.3
52.9
55.4
64.6
65.1
73.2
72.7
80.1
79.7
85.8
84.6
84.6
83.3
82.8
77.5
72.1
71.1
59.5
59.4 (68.0)
55.2 68.5
Mean
(17)
50.4
(17)
51.9
(17)
55.9
(16)
64.3
(17)
71.9
(17)
78.9
(18)
83.0
(17)
82.6
(17)
79.6
(17)
70.1
(16)
59.7
(18)
52.6
66.7
One reading per day
Source - USBF
98
Monthly and Annual Mean Surface V/ater Temperatures j °F
FRYING Pm SHOALS LIGHTSHIP 33°35'N. 77°50".V.
Year
Jan.
Feb.
Mar.
Apr.
May
June
July
rtUK.
Sept,
Oct.
Nov,
Dec.
Ann.
1878
_
_
_
.
_
_
.
_
72.4
64.2
57.4
^
79
50.3
49.2
-
59.8
66.4
72.5
79.8
80.2
77.3
74.7
65.6
62.7
(66.2)
1880
64.5
59.3
62.1
61.6
72.0
76.4
81.4
80.7
79.4
74.0
66.6
58.6
69.7
1881
53.0
52.3
53.1
57.1
68.0
76.4
80.8
80,4
79.9
76.4
69.5
60.3
67.3
82
56.4
58.6
60.0
63.8
-
75.4
80.5
80.9
79.3
71.6
60.9
53.9
(67.6)
83
50.9
54.6
54.9
59.8
67.5
75.9
80.8
77.9
76.6
72.1
63.6
59.3
66.2
84
55.9
58.7
57.7
61.2
68.7
74.4
78.7
79.0
78.5
76.2
66.5
62.1
68.1
1885
56.6
52.6
53.2
58.8
68.8
76.9
80.6
82.0
79.7
73.3
-
-
(67.4)
1886
_
51.8
55.6
62.3
69.6
76.5
79.6
77.7
78.3
74.2
65.9
59.5
(67.2)
87
53.9
54.7
54.3
61.1
70.5
76.0
80.9
78.9
76.4
74.2
64.4
60.2
67.1
88
57.8
59.2
56.1
61.7
70.3
77.2
78.9
81.5
78.6
71.1
-
55.0
(67.8)
89
55.7
51.8
54.2
60.8
69.8
76.7
79.8
80.2
78.9
72.1
66.3
66.0
67.7
1890
63.2
62.0
61.8
64.1
71.9
79.4
81.0
80.7
80.3
74.1
67.2
60.5
70.5
1891
55.2
60.8
60.4
63.7
71.3
79.0
80.0
81.7
79.3
72.5
63.0
60.3
68.9
92
54.7
52.2
53.2
60.0
69.5
77.2
78.8
81.5
79.1
74.4
66.7
64.5
67.7
93
50.9
53.8
54.8
61.5
69.6
77.0
81.2
80,1
79.6
73.7
63.8
59.5
67.1
94
58.5
55.7
60.7
64.7
72.8
76.7
79.2
81.6
80.1
73.6
-
60.8
(69.2)
1895
53.6
46.3
52.9
61.1
69.0
77.2
80.0
82.0
80.6
-
-
-
(66.9)
1896
57.3
55.3
55.2
61.1
74.3
78.0
80.2
80.1
79.0
70.7
68.7
60.7
68.4
97
57.9
54.9
57.3
64.5
70.2
77.5
82.6
81.3
79.0
73.9
67.2
66.1
69.4
98
56.5
57.0
60.3
62.2
70.0
76.1
80.4
81.9
79.5
75.2
66.0
59.9
68.8
99
59.2
52.2
54.0
-
-
-
79.4
80.6
79.7
73.6
66.8
60.6
(67.9)
1900
55.9
52.6
55.0
61,6
69.8
-
80.6
82.6
81.2
77.0
68.8
62.5
(68.7)
1901
55.8
51.5
_
_
67.7
75.9
79.7
81.4
78.8
71.4
61.7
54.5
(66.4)
02
51.4
46.5
52.5
-
-
-
81.8
79.8
77.6
74.0
69.4
61.3
(66.9)
03
56.4
55.8
64.1
64.0
68.7
76.6
81.1
81.8
79.9
72.4
65.3
57.5
68.6
04
53.4
52.5
56.2
-
-
-
-
81.0
-
73.1
65.3
61.7
(67.6)
1905
54.4
53.2
56.1
62.6
72.5
77.5
81.5
81.3
80.9
75.9
66.7
61.6
68,7
1906
56.8
56.0
56.9
62jlv
71.1
78.0
80.8
82.5
80.7
75.6
68.5
60.9
69.2
07
61,1
54.8
-
-
-
-
81.7
81,0
80.1
74.8
-
-
(68.7)
(28) (29) (26) (24) (24) (24) (28) (29) (28) (29) (25) (27)
Mean 56.0 54.3 56.6 61.7 70.0 76.7 80.4 80.8 79.2 73.7 65.9 60.3 68.0
Readings at first high water and first low water after 7 a.m.
Source - USCFF
99
Monthly and Annual Mean Surface Water Temperatures, °F
FRHNG PAN SHOALS LIGHTSHIP 33°27«55"N. 77°35'25"W.
Year Jan. Feb. Mar. Apr. May June July Aug. Sept. Oct. Nov. Dec. Ann.
1908 58.5 58.1 60.0» 65.2 71.5 77.6 80.2 81.1 78.8 73.5 69.7 64.8 69.9
09 63.9 58.0 62.4 65.9 70.8 78.0 78.8 80.6 79.1 73.9 71.6 62.8 70.5
1910 62.0 - 64.6 66.6 --___ ____
(3) (2) (3) (3) (2) (2) (2) (2) (2) (2) (2) (2)
Mean 61.5 58.0 62.3 65.9 71.2 77.8 79.5 80.8 79.0 73.7 70.7 63.8 70.4
* Position shifted to 33°28'12"N. 77<'36'06"W.
Readings at first high water and first low water after 7 a.m.
Source - DSCFF
100
Monthly and Annual Mean Surface Water Temperatures, °F
FRYING PAN SHOALS UDHTSHIP 33°34.1'N. 77°48.8'V;,
Year Jan. Feb. Mar. Apr. May June July ^^ufi. Sept. Oct. Nov. Uec. «nn.
1925 - - - - 69.4 74.9 78.7 77.8 78.9 74.7 (>k.B 60./, (67.5)
1926 55.3 52.9 52.2 57.0 64.7 72.7 78.2 80.4 79.0 74.2 67.1 63.2 66.4
28 52.7 55.3 57.2 62.2 66.2 74.7 77.8 80.9 78.4 76.7 67.5 58.8 67.4
29 55.8 57.6 60.0 65.9 69.7 75.8 80.4 80.1 78.3 72.8 70.8 65.3 69.4
1930 58.8 58.4 57.9 62.7 72.4 75.4 « - - _ _ _ _
(4) (4) (4) (4) (5) (5) (4) (4) (4) (4) (4) (4)
Mean 55.6 56.0 56.8 62.0 68.5 74.7 78.8 79.8 78.6 74.6 67.6 61.9 67.9
* Changed station
Readings at 8 a.m. and 6 p.m.
Source - USBF
101
Monthly and annual Mean Surface V/ater Temperatures, °F
FRYING PAN
SHOALS
LIGHTS IP
33°28.0'K.
77°34.0".V.
Year
Jan.
Feb.
Mar.
Apr.
May
June
July
"Ufi.
Sept,
Oct.
Nov.
Dec .
Ann.
1930
-
-
-
-
-
-
-
80.0
81.2
74.0
68.8
59.9
-
1931
32
33
34
58.7
67.7
65.1
65.9
60.9
66.3
61.5
61.0
61.0
61.4
64.3
65.0
61.9
63.9
66.8
67.7
66.5
69.1
73.4
70.8
71.5
74.6
76.8
77.1
79.7
76.6
79.4
82.0
80.0
78.8
81.7
80.0
79.6
78.8
81.8
80.5
78.3
77.3
78.2
77.8
72.4
72.5
70.9
71.1
69.6
68.2
67.4
68.3
70.0
71.3
72.3
72.3
Mean
(4)
64.4
(4)
62.4
(4)
62.9
(4)
65.1
(4)
70.0
(4)
75.0
(4)
79.4
(5)
80.1
(5)
80.4
(5)
77.1
(5)
71.1
(5)
66.7
71.2
Readings at 8 a.m. and 6 p.m.
Source - OSBF
102
0
Monthly and Annual Mean Surface Water Temperatures, F
FRHNG PAN
SHOALS
LIGHTSHIP
0
33 28'N.
0
77 34 'W.
Year
Jan.
Feb.
Mar.
Apr.
May
_June__
July
Aug.
Sept.
81.2
Oct.
75.6
Nov.
73.2
Dec.
70.4
Ann.
1947
82.0
48
66.2
63.8
64.0
69.9
-
-
81.8
81.5
80.9
75.0
74.3
71.0
(73.1)
49
68.6
64.2
63.2
65.2
-
-
81.6
80.6
78.8
77.6
70.4
67.6
(72.2)
1950
68.5
65.6
66.6
66.8
-
-
79.0
80.8
79.8
77.0
72.8
65.9
(72.7)
1951
61.0
61.9
61.4
62.8
_
_
78.2
81.0
81.0
73.6
66.7
61.7
(69.9)
52
62.9
63.0
62.0
-
74.2
79.6
80.6
82.2
79.0
74.6
69.8
63.9
(71.4)
53
63.1
61.2
-
-
-
77.6
80.5
80.3
79.5
75.5
69.4
68.5
(71.3)
54
63.2
60.6
61.0
-
-
77.2
79.9
78.3
75.3
71.6
65.2
60.2
(69.2)
1955
57.9
55.5
62.0
65.6
71.0
74.3
80.2
79.8
78.0
74.8
68.2
64.4
69.3
1956 60.0 62.0 60.6 62.7 71.2 76.1 79.8 80.1 78.8 - - - _
(9) (9) (8) (6) (3) (5) (9) (10) (10) (9) (9) (9)
Mean 63.4 62.0 62.6 65.5 72.1 77.0 80.2 80.7 79.2 75.0 70.0 66.0 71.1
Readings at 0130, 0730, 1330 and 1930 EST.
Source - NTOC
103
o
Monthly and Ailnual Mean Surface Water Temperatures, F'
SMITHVILLE, NORTH CAROLINA 33 $2»N. 78 OO'W. (?)
Year Jan. Feb. Mar. Apr. May June July Aug. Sept. Oct. Nov. Dec. Ann.
1880 - - 58.8 63.5 73.14 79.6 87.0 80.3 78.8 68.2 58.0 U8.5 (66.2)
1881 U3.2 U8.1 52.8 57.5 - 79.7 83.5 81.7 81.1 73.9 6U.2 5U.3 (66.0)
82 50.6 53.24 - - 71.2 - 82.9 83.6 77.3 70.1 59.0 li9.1 (66.0)
83 - i;9.5 55.U - 69.ii 78.6 8U.2 82.2 75.8 70.7 61.6 55.1 (65.9)
8U U6.2 58.0 57.2 - 7h.0 77.7 - 81.1 - 72.8 61.2 - (66.8)
1885 50.1 W.U U9.5 60.7 72.6 78.9 82.6 83.8 75.2 67.6 60.6 50.2 65.0
1886 U5.3 U7.8 52.2 62.9 73.U 78.3 80.7 80.2 79.7 71.2 - - (65.3)
(5) (6) (6) (U) (6) (6) (6) (7) (6) (7) (6) (5)
Mean U7.1 50.9 5U.3 61.2 72.3 78.8 83.5 81.8 78.0 70.7 60.8 51. U 65.9
Cape Fear River, foot of Government Wharf.
1880-June 1381 incl., readings at 1 p.m.
July 1881 etc., readings at 2 p.m., 75th meridian time.
Source - U3CFF
104.
o
Monthly and Annual Mean Surface Water Tanperatures, F
0 0
WILMINGTON, NOKTK CyJlOLTNA 34 lA'N. 77 57'W,
Year Jan. Feb. Mar. Apr. May June July Aug. Sept. Oct. Nov. Dec. Ann.
65.0 54.5 50.0 -
64.9 57.7 48.7 64.4
66.0 59.7 52.4 (65.2)
70.1 57.3 48.9 64.9
74.7 64.4 61.2 (67.3)
70.5 59.5 - (69.6)
63.0 52.7 (66.1)
70.4 57.9 46.6 (65.4)
68.1 57.8 - (66.2)
74.4 60.8 -
70.0 - - (65.1)
(64.2)
(10) (11) (10) (9) (11) (9) (10) (8) (10) (10) (10) (7)
Mean 46.5 49.8 55.1 62.6 71.7 79.6 83.8 81.2 77.1 69.4 59.3 51.5 65.6
1873
-
-
-
-
-
-
-
-
74.3
74
48.0
48.0
56.0
63.3
68.1
80.7
82.0
78.5
76.5
1875
44.5
46.8
-
-
-
-
-
-
-
1876
_
_
.
•,
_
..
_
_
_
77
-
-
56.4
61.5
68.9
78.8
84.6
82.7
75.2
78
46.7
47.1
53.0
61.1
70.1
76.9
84.6
84.1
78.5
79
44.8
48.4
58.8
62.2
71.0
80.9
83.7
80.7
-
1880
57.4
58.2
61.4
69.9
77.8
83.3
85.8
-
78.6
1881
42.5
48.0
56.1
58.3
75.1
80.9
85.7
_
80.7
82
-
53.1
-
-
70.6
79.3
83.7
81.8
76.8
83
46.2
53.4
52.2
61.2
70.3
-
84.7
83.2
73.6
84
43.6
54.1
55.1
-
73.3
-
-
78.8
-
1885
49.3
46.1
49.0
61.9
72.7
77.8
84.0
-
78.1
1886
42.0
44.5
53.2
63.8
71.2
78.2
79.3
80.0
78.4
Cape Pear River, foot of Market Street; 1875 - Princess Street; March 1884 - near
Custom House Wharf j October 1884 - Princess Street.
1873-Oet. 1879 incl., readings at 3p.ni.
Nov. 1379-June IS^^l incl., readings at 1 p.m.
July 1881 etc. readings at 2p.m.
Source - USCFF
105
Monthly and Annual Mean Surface VJater Tenperatures, F
RATTLESNAKE SHOAL LIGHTSHIP 32°liU'00" N. 79°li3'lj.U"W.
Year Jan. Feb. Mar. Apr. May June July Aug. Sept. Oct. Nov. Dec. Ann.
1878
79
1880
1881
82
83
8U
1885
1886
87
88
89
1890
1891
92
93
9h
U8.7
59.5
U8.7
55.0
50.1
50.0
52.7
U6.5
U8.3
53.2
53.8
60. [i
51.5
50.8
i;5.6
53.1
51.2
57.3
51.0
57.2
5I4.8
57.3
51.1
li9.2
5U.6
5U.1
50.3
60.0
56.8
52.U
50.7
53.2
55.8
63.0
55.1
61.2
55.9
58.5
53.7
52.9
56.6
56.8
5U.3
57.8
57.0
51.5
5h.6
57.6
63. Ii
66.0
59.9
66.9
63.2
6U.5
61. li
62.3
62.2
65.1
62.2
65.3
6U.9
62.1
62.6
63.2
71.7
7I1.I
72.1
73.1;
72.9
71.8
73. Ii
77.9
79.3
72.1 80.2
73.2 79.0
71.1 79.0
73.6 76.6
70.5 78.1i
78.6
78.8
78.7
77.8
81.3
71.7 79.9
71.2 78.0
70.0 77.3
71. 9-' -
82.9
81i.0
811.2
81.8
83.2
81.6
81.U
81.2
80.0
80,7
82.5
81.2
80.7
80.1j
81.6
83.8
82.8
82.6
83.6
81.3
81.8
80.2
82.7
83.5
79.5
82.U
82.U
81.3
76.3
81.1
82.7
80.9
77.6
80.2
78.9
79.6
76.8
79.8
79.0
80.2
79.6
77.6
78. U
72. U 63.1 5U.i4 -
7U.3 63.3 59.3 67.2
71.9 61.7 53.8 69.6
76.2 67.3 57.5 68.]
73.7 62.6 52.1 68.8
73. U 63.9 57.6 67.8
76.0 65.0 57.6 68.5
70.6 63.1 53.6 66.U
72.6
71.0
69.5
70.0
73.0
69.U
71.0
69. U
63.5
61.1
63.1
6U.6
65.5
60.1
52.8
5U.2
53.1
59.1'
56.2
66.7
67.5
67.0
69.8
59,
55.2 67.5
55.5 -
7 5U.5 -
(U) (16) (16)
Mean 52.6 53.8 56.6
(16) (16) (15) (Hi) (Hi) (15) (16) (15) (16)
63. U 72.2 78.7 81.8 82.1 79.2 72.2 63.2 55. U
67.6
*Moved to 32 ii2.1'N 79 I|6.1'V; as Charleston Bar Lightship
Readings at first high water and first low water after 7 a.m.
Source - USGFF
106
Monthly and Annual Mean Sijrface Water Tenperatures, °F
CHARLESTON BAR LIGHTSHIP 32°42.1'N. 79°46.1'W.
Year Jan. Feb. Mar. Apr. May June July Au^. Sept. Oct. Nov. Dec. Ann.
1894
1895
49.5 47.2
54.1
62.4
71.4
78.6
77.9
81.3
81.2
82.8
8:^.8
81.1
81.1
72.4
69.9
63.0
61.8
57.2
53.6
66.1
1896
97
98
99
1900
50.9 53.3
50.4 51.6
51.3 50.2
50.0 46.8
48.2 47.2
54.9
59.2
55.8
54.5
51.8
63.1
63.2
62.2
60.1
60.9
74.4
69.3
70.3
70.8
61.2
80.4
77.8
78.5
76.5
77.8
83.1
80.5
81.4
80.3
79.8
81.7
81.0
82.1
80.9
81.2
79.9
77.2
77.8
78.6
80.0
69.1
70.0
71.6
69.9
74.4
65.8
63.7
61.4
62.9
64.5
54.1
57.2
50.9
55.3
54.7
67.6
66.8
66.1
65.6
65.1
1901
02
03
04
1905
51.4 49.6
47.6 48.7
49.3 51.9
46.2 47.2
41.0 43.9*
53.0
54.5
58.6
55.0
60.5
60.8
63.2
61.1
69.4
72.2
69.1
70.5
75.1
78.0
77.4
78.2
80.3
83.2
80.6
81.9
82.3
82.2
83.6
81,9
78.2
76.9
78.4
78.9
70.8
72.9
70.4
72.0
58.9
65.6
60.8
61.6
50.4
57.6
48.6
52.7
65.0
66.7
66.0
65.6
Mean
(11) (11)
48.7 48.9
(10)
55.1
(10)
61.8
(10)
69.9
(11)
77.8
(11)
81.2
(11)
82.0
(11)
78.9
(11)
71.2
(11)
62.7
(11)
53.8
66.0
*Moved to new postion 32°41.0'N 79°13.5'W
Readings at first high water and first low water after 7 a.m.
Source - U3CFF
107
Monthly and Annual Mean Surface Water Temperatures, °F
CHAHLESTON BAR LIGHTSHIP, S.C. 32°41.0«N 79°43.5'W
Year Jan. Feb. Mar. Apr. May June July Aug. Sept. Oct. Nov. Dec. Ann.
1905 - - 52.4 65.6 73.6 79.2 83.0 82.0 81.0 75.0 63.0 54.4 (67.7)
1906 53.7 50.7 56.0 62.5 70.5 79.0 81.0 81.2 79.4 71.6 62.2 56.8 67.0
56.0 68.9 75.9 80.3 80.6 79-4 70.5 60.9 54.3 65.8
64.7 71.9 - - - 77.0 69.0 62.7 58.6 (66.7)
63.1 71.0 78.6 80.2 81.4 77.5 69.9 65.1 55.0 67.3
64.0 69.1 76.7 - 79.3 78.8 75.6 60.3 50.6 (65.6)
1911 50.5 54.1 55.4 - 70.1 79.4 82.1 79.8
(5) (6) (7) (6) (7) (6) (5) (6) (6) (6) (6) (6)
Mean 52.1 51.3 55.7 62.6 70.7 78.1 81.3 80.7 78.8 71.9 62.4 55.0 66.7
Readings at first high water and first low rater after 7 a.m.
Source - USBF
07
53.9 51.6
56.9
08
49.5
55.6
09
54.8 53.8
57.2
1910
47.6 48.0
56.3
lOB
Monthly and Annual Mean Surface Aater Temperatures, °F
CH.'iRLLSTON LIGHTSHIP 32°40.7'N 79°42.9'W (1925-28)
32 41.0 N 79 43.0 W (1929-33)
Apr. May June July Aug. Sept. Oct. Nov. Dec. Ann.
71.7 77.4 81.9 81.5 81.6 75.5 62.0 54.1 -
59.5 68.0 75.4 79.2 82.1 81.4 73.6 60.0 54.8 65.5
61.6 66.2 74.3 76.8 80.3 76.5 73.7 62.5 54.4 64.6
66.6 71.3 76.1 79.9 80.5 77.3 70.1 65.5 54.5 66.9
62.6 72.3 76.6 79.4 78.7 81.6 71.7 60.7 52.8 66.6
60.8 70.1 77.2 83.2 79.2 80.3 74.1 66.1 62.8 67.2
63.0 71.8 77.8 81.6 79.8 78.5 72.4 63.3 55.7 68.5
63.7 72.4 78.8 - - - - - - -
(7) (7) (7) (7) (8) (8) (7) (7) (7) (7) (7) (7)
Mean 52.4 52.8 55.2 62.5 70.5 76.7 80.3 80.3 79.6 73.0 62.9 55.6 66.8
Readings at 8 am. and 6 pm.
Source - USBF
Year
Jan. Feb.
Mar.
1925
-
-
1926
27
28
29
1930
48.3 51.1
47.6 48.3
52.5 51.0
53.2 53.8
52.4
53.2
57.2
55.5
1931
32
33
48.0 51.4
60.9 60.4
56.6 53.8
53.4
57.0
57.8
109
Monthly and Annual Mean Surface Water Tanperatures, °F
CHARLESTON, S.C.
32°47'N. 79°55'W.
Year
Jan. Feb.
Mar.
Apr.
May
June
July
Aug.
Sept.
Oct,
Nov.
Dec.
Ann.
1873
.
.
.
.
.
.
82.9
79.5
69.8
60.9
74
-
-
67.1
71.0
83.6
82.2
83.1
76.0
71.5
62.6
57.2
-
1875
49.1 50.0
—
~
~
"
"
—
—
—
—
—
—
1876
77
: :
56.5
61.6
70.2
79.2
84.2
84.5
80.2
71.9
63.8
53.8
"(67.4)
78
51.4 52.7
60.8
68.0
74.2
78.7
83.3
83.9
72.1
70.9
60.6
51.6
67.4
79
45.0 50.0
56.4
63.7
73.5
79.9
-
81.8
75.7
72.5
60.2
57.6
(66.6)
1880
58.5 56.9
-
65.5
74.5
80.5
84.2
83.0
77.4
69.7
59.5
54.1
(68.3)
1881
51.3
54.2
59.2
74.8
82.0
84.2
83.3
82.5
73.4
64.9
55.3
(68.0)
82
54.4 56.3
-
-
73.6
-
82.7
83.7
82.1
72.6
61.1
50.4
(68.2)
83
50.0 55.7
55.6
64.8
72.8
81.8
85.8
84.3
78.0
73.6
62.6
55.9
68.4
84
49.1 -
58.9
64.6
-
-
82.2
-
79.6
74.9
61.9
54.8
(68.0)
1885
49.0 49.8
52.2
62.9
72.8
80.4
82.8
83.0
78.7
68.6
61.4
50.7
66.0
1886
42.6 48.4
53.2
64.3
73.6
79.9
83.7
82.4
80.4
71.7
61.6
50.4
66.0
87
46.8 55.6
56.7
62.4
75.0
80.4
83.2
83.6
76.9
69.9
58.9
52.2
66.8
88
51.6 53.7
55.8
64.8
73.1
81.3
83.2
85.0
80.4
69.7
63.4
51.6
67.8
89
50.4
55.2
-
73.8
79.4
82.7
81.8
-
69.1
63.4
57.2
(67.2)
1890
59.4 58.7
58.5
65.4
74.8
83.0
84.0
84.9
81.6
73.5
-
-
(70.0)
(12) (13)
(12)
(13)
(14)
(13)
(14)
(15)
(15)
(16)
(15)
(14)
Mean
50.6 53.0
56.2
64.2
73.4
80.8
83.4
83.4
78.7
71.4
61.8
53.8
67.6
End of pier. April '74 Atlantic Wharf, midway between Cooper and Ashley Hivers,
S.E. oomer of S. Atlantic Wharf. Feb. '79, S. end. Pier 2.
1873-June 1381 incl., readings at 3 p.m.
July 1881 etc., readings between 1:40 and 2 p.m., 75th meridian time.
Source - USCFF
110
Monthly and ijiinual liean Surface Water Temperatures, F
MARTIN'S INDUSTRY LIGHTSHIP 32°o5'31"N. 80°35'07"'V.
Year
Jan .
Feb.
Mar.
Apr.
Uay
June
July
»UR.
Sept.
Oct.
Nov.
Dec.
Ann.
1878
79
1880
50.4
59.6
51.0
57.8
56.3
64.0
63.1
66.8
71.7
73.5
78.1
79.1
82.8
84.4
82.9
84.0
78.4
81.2
73.3
74.3
72.6
64.9
64.9
62.6
56.0
60.4
54.2
67.8
70.0
1881
82
83
84
1885
48.7
56.0
49.7
51.5
53.8
50.8
57.6
54.4
54.9
52.1
55.6
60.6
56.9
58.2
53.9
59.9
66.9
63.5
64.9
61.9
71.4
71.2
70.5
72.1
71.5
79.4
78.4
79.2
77.1
80.1
83.4
81.9
83.6
82.5
83.8
83.1
82.7
83.9
82.5
85.1
81.4
80.9
79.1
81.3
81.3
76.5
73.8
74.7
77.7
72.1
68.5
63.5
65.1
66.7
65.0
58.4
52.5
58.5
60.0
56.0
68.1
68.8
68.2
69.1
68.0
1886
87
88
89
1890
48.6
48.6
53.5
52.2
59.2
48.9
53.6
53.9
51.2
59.8
53.5
57.0
55.4
53.5
59.0
63.2
61.8
63.7
61.7
65.2
73.0
72.9
70.9
69.5
73.4
81.3
79.0
76.1
80.4
84.2
82.9
82.3
81.0
83.5
81.7
83.3
84.0
81.0
82.0
80.2
77.6
80.7
79.3
81.0
73.9
72.0
71.0
71.8
74.5
65.4
62.8
65.4
66.5
65.2
54.4
54.8
53.1
58.8
57.8
67.4
67.2
(67.7)
66.9
70.1
1891
92
93
94
1895
52.4
51.4
48.4
55.7
51.9
56.1
51.6
51.1
54.4
47.6
57.0
54.4
57.0
58.8
54.2
63.8
63.2
64.2
65.3
62.4
71.1
71.5
71.6
74.1
72.0
79.4
78.8
79.6
78.0
81.7
80.9
83.3
81.2
83.3
82.5
82.2
83.0
80.1
79.3
80.7
82.1
81.1
71.1
72.2
73.7
73.2
71.6
61.7
63.9
63.6
64.0
62.4
55.9 67.8
58.1 67.3
56.8 67.9
59.3 69.1
55.7 (66.9)
1896
97
98
99
1900
51.8
51.9
53.5
50.7
50.7
53.6
52.1
50.6
50.0
55.7
58.4
55.9
55.4
52.9
63.7
64.6
63.0
61.4
61.5
74.4
71.1
71.7
72.2
71.0
80.4
79.7
79.9
77.8
77.9
82.9
82.9
82.9
80.5
81.3
81.9
82.8
83.3
82.2
82.1
80.5
78.0
78.7
80.6
82.4
70.7
71.3
74.4
70.4
76.3
66.4
65.5
62.9
65.2
67.0
55.3
57.8
53.8
57.7
56.7
68.1
(68.0)
67.7
67.0
67.5
1901
02
03
04
1905
52.7
50.6
53.2
60.4
-
75.8
82.0
81.7
79.6
71.1
-
.
(66.6)
-
-
52.9
64.6
73.0
78.4
82.9
82.2
80.9
-
62.8
53.9
(67.5)
1906
07
08
09
1910
52.1
55.6
52.7
56.2
49.3
51.0
52.6
50.4
54.5
49.7
55.4
58.3
56.8
59.2
57.0
63.1
59.9
66.5
63.9
64.3
71.1
70.0
73.0
71.5
70.7
79.1
77.7
81.2
79.9
78.4
83.0
83.0
82.8
82.1
81.4
83.9
82.9
83.7
82.0
82.0
81.8
78.6
80.6
72.5
71.9
70.7
76.7
62.4
62.4
63.4
62.8
57.9
56.4
59.7
57.5
53.0
67.8
67.7
68.3
(68.8)
67.2
1911
51.3
55.0
57.1
63.2
71.0
80.0
83.4
83.5
82.4
78.2
64.0
-
(68.8)
Mean
(29)
52.4
(28)
52.7
(30)
56.4
(30)
63.4
(29)
71.8
(28)
78.9
(29)
82.6
(28)
82.8
(29)
80.4
(29)
73.2
(29)
64.4
(29)
56.6
68.0
Readings at first high water and first low water after 7 a.m.
Source - USCFF, USBF
Ill
o
Monthly and Annual Mean Surface Water Temperatures, F
SAVAMAH LIGHTSHIP
3i°55.5'N.
0
80 39.6'W.
Year
Jan.
Feb.
Mar.
Apr.
May
June
July
Aug.
Sept.
Oct.
Nov.
Dec.
Ann.
19U7
^
.
_
.
.
77.9
80.9
83.0
82.1
72.1
65.9
55.7
U8
51.5
h9.h
55.9
66.0
7U.0
79.1i
83.2
83.0
80.2
71.1
67.3
61.8
68.6
h9
57.6
59.6
60.3
65.5
73.7
78.1
82.7
8U.2
80.8
70.9
6U.8
53.5
69.3
1950
51j.2
57.5
5U.2
60.3
72.7
78.6
79.0
82.8
81.1
73.9
67.8
5U.0
68.0
1951
51. Ij
ii8.8
5U.2
63.7
70.3
78.5
83.li
8U.6
82.i4
7I1.6
6U.5
56.9
67.8
52
5U.6
52.3
51*. 6
61i.8
72.U
8l.li
83.7
31i.li
79.5
71.5
65.1
61.2
68.8
53
53.5
55.5
60.0
-
-
-
82.5
82.7
80.2
-
-
-
_
51
_
-
_
66.8
73.1
78.5
-
-
-
-
-
-
-
1955
52.5
-
-
-
-
-
-
-
79.3
-
-
-
-
(7) (6) (6) (6) (6) (7) (7) (7) (8) (6) (6) (6)
Mean 53.6 53.9 56.5 61.5 72.7 78.9 82.2 83.5 80.7 72.1; 65.9 57.2 68.5
Readings at 0130, 0730, 1330 and 1930 EST.
Source - NWRC
112
Monthly and Annual Mean Surface Water Temperatures, *'F
SAVAI^IJAH, GEORGIA 32 05'N. 81 05'W.
Year Jan. Feb. Mar. Apr. May June July Aug. Sept. Oct. Nov. Dec, Ann.
68.1 55.2 51.7 -
68.1 61.2 51.9 66.9
71.1 61.0 51.3 (67.1)
71.3 - li9.6 (68. Ij)
69.5 56.2 51.8 (66.6)
69.1j - - (68.1)
75.1 63.3 5a. 9 (66.7)
71.7 60.5 h7.l4 (68.1i)
7U.2 62.8 - (68.0)
75.6 61.6 - (67.7)
65.7 57.5 U8.7 65.8
70.9 58.8 h7.0 (65.1)
(12) (10) (9)
70.9 59.8 50.5 67.0
1873
7U
1875
U9.7
U8.5
52.1.
U9.2
59.8
66.3
69.7
82.6
81.9
82.7
77.2
76.6
1876
77
78
79
1880
U8.t,
U6.8
56.1
51.8
52.U
53.8
57.5
61.3
61.0
62.5
62.5
69.3
65.3
6U.9
71.1
77.0
7U.8
73.2
80.U
81.3
8U.7
85.7
85.1
85.9
8li.U
86.1i
80.1
82.6
79.7
79.2
76.0
78.8
1881
82
83
8U
1885
U5.1;
5U.5
U8.2
U7.U
50.3
51.3
55.2
58.0
57.3
U6.h
55.U
62.9
55.7
58.1
52.9
60.8
68.8
65.1
65.9
73.7
72.8
75.9
75.0
80.6
81.3
76.5
79.9
8U.6
8U.7
80.5
8ii.9
78.9
83.7
85.0
83.3
8U.3
76.5
77.6
78.7
80.3
78.2
1886
87
U5.3
U8.0
56.8
5U.7
57.0
63.2
72.7
76.9
78.3
8l.li
79.9
Mean
(11)
U9.1
(12)
52.7
(12)
58.2
(10)
65.2
(10)
73.6
(8)
79.9
(10)
83.6
(11)
83.0
(12)
78.2
Exchange Vftarf , 1873-75
Drayton St. '^arf, 1877-87
1873-Oct. 1379 incl., readings at 3 p.m.
Nov. 1879-June 1881 incl., readings at 1 p.m.
July 1881 etc., readings at 1:4-0 p.m.
Source - USCFF
U3
Monthly and Annual Mean Surface Water Ten^ratures, °F
BRUNSWICK LIfflTSHIP STATION, GA. 31°00.2'N. 81°09'W.
Year Jan. Feb. Mar. Apr. May June July Attg. Sept. Oct. Nov. Dec. Ann.
1925 --- ._--- 82.2 77.0 64.7 56.2 -
1926 51.5 54.1 55.3 61.8 69.4 76.2 79.0 79.4 81.4 77.3 65.0 60.9 67.6
27 - 60.3 61.9 68.4 73-1 80.3 82.0 80.1 81.3 74.8 67.8 60.7 (70.3)
?8 53.3 53.5 56.6 65.3 69.6 75.6 75.4 80.3 79.2 75.9 66.6 57.8* 67.4
(2) (3) (3) (3) (3) (3) (3) (3) (4) (4) (4) (4)
Mean 52.4 56.0 57.9 65.2 70.7 77.4 78.8 79.9 81.0 76.2 66.0 58.9 68.4
* Moved to 30°30.0'N 810l8'W and renamed St. Johns Lightship
Readings at 8 am and 6 pm
Source - U3BF
lU
o
Monthly and Annual Mean Surface V/ater Temperatures, F
ST. JOHNS LIGHTSHIP, FLORIDA 30°30.0«N. 81 l8'W.
Year Jan. Feb. Mar. Apr. May June July Aug. Sept. Oct. Nov. Dec. Ann.
1929 - 55.5 61.1 69.0 7U.5 78.8 82.3 79.8 80.5 73.6 70.8 60.3* -
*Moved to 30°23.0»N. 81 l8'W
Off St. Johns Bar
Readings at 8 9,ni. and 6 p.m.
Source - D3BF
115
o
Monthly and Annual Mean Surface Water Temperatures, F
o o
ST. JOHNS LIGHTSHIP, ST. JOHNS BAR, FLORIDA . 30 23.0'N. 81 18'W.
Year Jan. Feb. Mar. Apr. May June July Aug. Sept. Oct. Nov. Dec. Ann.
1930 56.2 56.5 60.0 67.0 75.4 76.2 77.4 78.6 79.9 73-3 63.3 55-9 (68.3)
1931 52.7 54Ji 56.7 63.6 71.4 77.9 81.8 77.7 80.6 76.0 69-7 67.6 (69.2)
32 66.1 65.2 61.1 66.5 74.0 79.1 79.6 78.4 80.7 75-4 68.0 59.8 (71.2)
33 59.6 58.8 61.7 67.6 75.8 78.9 81.6 82.7 83.6 76.4 - 65.5 (71.7)
34 60.7 56.1 56.5 64.9 73.7 78.3 - - - _ _ _ _
(5) (5) (5) (5) (5) (5) (4) (4) (4) (4) (3) (4)
Mean 59.1 58.2 59.2 65.9 74.1 78.1 80.1 79.4 81.2 75.3 67.0 62.2 70.0
Readings at 8 a.m. and 6 p.m.
Source - USBF
116
o
Monthly and Annual Mean Surface V/ater Temperatures, F
ST.
JOHNS LIGHTSHIP
0
30 23.5 'N
0
. 81
18.0'W
•
Year
Jan.
Feb.
Mar.
Apr.
May
June
July
Aug.
Sept.
Oct.
Nov.
Dec.
Ann.
1947
48
49
1950
55.6
63.0
59.4
52.8
62.7
62.2
59.3
63.3
62.0
68.7
68.1
65.8
76.1
74.0
74.6
78.3
80.5
78.9
80.4
79.4
82.4
83.0
77.0
82.1
80,5
81.1
78.9
82.4
81.0
80.8
79.2
74.6
73.4
77.1
74.6
69.8
70.7
68.6
68.2
59.4
66.4
61.2
55.1
70.6
71.8
69.8
1951
52
53
54
55.8
59.2
58.4
58.7
56.9
58.8
58.7
61.7
61.2
63.8
58.7
66.5
66.2
65.6
68.9
73.6
73.5
71.7
73.7
79.3
79.7
79.0
78.1
81.7
76.9
82.5
81.9
81.8
76.9
82.6
82.6
81.5
79.0
80.4
83.1
76.8
73.5
75.3
67.1
65.9
66.3
59.5
59.7
61.3
70.2
69.2
(70.5)
Mean
(7)
58.6
(6)
58.7
(7)
61.4
(7)
67.1
(7)
73.9
(8)
79.3
(8)
80.6
(8)
80.8
(8)
80.9
(7)
75.0
(7)
68.1
(7)
60.4
70.4
Readings at 0130, 0730, 1330 and 1930 EST
Source - NUIRC
117
Monthly and /innual Mean Surface Water Temperatures, F
JACKSONVILLE, FLORIDA 30 19'N. 81°38'iV.
Year
Jan.
Feb.
Mar.
Apr.
May
June
July
Auk.
Sept.
Oct.
Nov.
Use.
nnn.
1873
_
_
.
^
_
_
_
84.1
81.7
73.2
63.5
60.3
_
Ik
55.0
61.1
68.4
74.2
78.8
85.6
84.3
85.5
81.4
75.0
67.7
62.2
73.3
1875
59.4
No
records
1876
No recordp
77
-
58.4
62.6
65.7
71.2
79.7
82.5
81.7
80.1
70.8
63.5
57.4
-
78
54.8
58.3
66.2
73.8
80.6
84.2
87.2
87.0
82.0
74.4
66.1
57.1
72.6
79
54.1
58.4
66.0
69.8
77.3
82.8
86.7
85.7
80. ^
77.0
68.4
6/,. 7
72.6
1880
65.0
62.8
71.6
73.4
77.6
83.8
87.4
81.6
73.5
-
-
-
-
1881
54.0
58.8
61.8
66.9
80.2
85.5
87.1
84.3
83.9
79.0
70.6
61.5
72.8
82
62.2
64.2
-
-
77.8
-
85.7
86.3
83.0
76.3
65.9
55.9
-
83
56.8
67.3
63.4
72.7
77.8
84.1
88.8
86.9
81.8
78.9
68.5
-
-
8^
54.9
63.9
67.1
-
80.8
80.0
85.8
85.8
82.6
77.5
68.3
-
-
1885
58.7
57.3
60.8
71.5
77.6
-
-
85.7
83.2
73.4
64.8
55.6
-
1886 50.7 54.1 60.1 69.4 78.3 84.9 83.7 85.0 82.2 74.7 65.6 55.2 70.3
87 52.0 66.3 63.4 ------ ___-
(12) (12) (11) (9) (11) (9) (10) (12) (12) (11) (11) (9)
Mean 56.5 60.9 64.7 70.8 78.0 83.4 85.9 85.0 81.3 75.5 66.6 58.9 72.3
Atlantic Dock, Pine St., Aug. 1873-Feb. 1877; East Side, Pine St., Mar. 1877-Dec. 1877;
Foot of Pine St., Jan. 1878-Aug. 1878; Roots "/harf, Sept. 1878- July 1880; nstors ■■.'harf,
Aug. 1880-Uar. 1887.
1873-Oct. 1879 inol., readings at 3 p.m.
Nov. 1879-June 1881 incl., readings at 1 p.m.
July 1881 etc., readings at 1:40 p.m.
Source - U3CFF
118
Monthly and Annual Mean Surface Water Tenperatures, °F
FOVffiY ROCKS LIGHTHOUSE, FLORIDA 25°35'25"N. 8O°05'a"W.
Year Jan. Feb. Mar. Apr. May June July Auk. Sept. Oct. Nov. Dec. Ann.
1879
.
.
73.5
80.2
81.1
81.2
76.6
76.9
76.3
1880
-
74.6
74.4
75.9
77.7
81.7
84.4
84.0
83.2
81.2
79.0
75.2
-
1881
73.2
74.1
72.2
74.6
79.3
82.9
84.9
84.2
83.4
80.7
78.4
76.3
78.7
82
74.0
73.9
75.4
77.9
79.2
82.9
84.6
84.3
83.4
81.6
76.8
74.7
79.0
83
74.5
75.7
74.2
77.4
78.5
82.3
84.2
85.0
84.2
81.9
77.8
75.7
79.3
84
73.5
74.6
74.4
75.8
78.5
80.6
83.6
84.2
84.0
80.3
77.6
75.3
78.5
1885
74.9
71.7
71.3
76.6
80.0
81.4
84.4
86.0
85.3
80.8
75.2
72.1
78.3
1886
70.7
70.6
72.8
74.9
79.6
83.0
83.7
83.9
83.7
80.7
76.5
72.4
77.7
87
71.2
75.6
73.3
75.7
78.2
81.2
84.7
85.5
83.4
82.2
77.1
75.3
78.6
88
74.9
73.8
72.9
75.5
75.9
81.1
86.2
85.8
82.1
79.4
77.8
73.0
78.2
89
73.0
72.2
73.1
74.5
78.9
82.1
84.0
84.2
82.5
80.1
78.2
75.4
78.2
1890
74.6
75.5
74.0
75.8
79.3
83.1
84.0
84.9
84.3
82.0
77.8
73.4
79.0
1891
_
75.8
74.8
76.7
78.4
81.7
85.0
84.6
83.5
78.7
75.8
75.4
—
92
73.4
72.8
73.1
75.6
78.2
79.6
83.2
84.1
83.8
80.1
75.0
74.7
77.8
93
71.4
74.6
74.5
75.9
78.3
82.8
85.3
85.2
83.8
80.2
76.6
74.5
78.6
94
74.0
73.8
73.7
75.2
76.7
80.0
83.2
85.8
84.5
78.8
75.2
73.6
77.9
1895
73.1
68.4
73.3
74.8
78.2
79.6
82.9
83.7
84.9
79.0
75.8
71.2
77.1
1896
69.3
70.2
72.2
75.1
79.8
82.9
85.9
86.5
86.0
81.6
81.9
71.2
78.6
97
69.6
71.6
73.6
73.2
75.8
82.5
85.2
87.2
82.4
78.4
75.5
74.0
77.4
98
71.5
70.8
72.4
77.3
77.4
81.6
84.4
85.1
86.1
81.4
74.2
64.9
77.2
99
71.4
68.1
72.9
76.8
80.4
82.1
82.9
83.8
82.0
80.2
77.6
71.7
77.5
1900
67.4
-
-
72.2
74.7
77.3
82.0
81.3
81.0
78.7
73.9
71.0
-
1901
70.1
67.2
70.2
75.6
74.5
75.0
75.0
82.5
81.3
80.1
71,2
67.7
74.2
02
64.6
69.0
70.3
72.0
74.2
74.4
76.1
74.4
74.6
73.5
76.3
73.9
72.8
03
70.9
76.3
72.0
74.8
73.3
76.0
75.4
75.7
75.8
73.5
71.5
70.8
73.8
04
69.4
69.6
70.0
71.8
71.2
73.0
81.0
81.8
81.8
78.1
76.7
72.4
74.7
1905
69.8
76.0
76.8
78.0
82.0
83.0
85.5
84.9
83.0
79.9
77.4
72.7
79.1
1906
70.0
70.6
73.8
77.6
79.0
83.5
84.2
84.1
85.4
81.1
77.6
72.0
78.2
07
72.7
71.3
77.2
73.5
82.3
81.3
82.3
85.3
83.8
81.1
77.0
76.0
78.6
08
71.4
71.6
76.5
77.0
83.6
84.3
86.8
85.0
83.6
79.2
79.8
77.6
79.7
09
76.8
71.8
79.4
82.3
83.9
82.7
84.7
84.9
82.7
81.5
75.9
70.8
79.8
1910
71.0
70.2
72.8
75.0
76.2
83.9
83.6
85.5
82.6
79.9
73.7
69.6
77.0
1911
72.7
74.5
72.8
76.9
77.2
82.6
82.8
83.8
83.3
82.6
80.2
77.0
78.9
12
75.9
71.8
74.9
78.6
80.2
81.8
82.6
83.2
84.1
84.2
78.1
75.8
79.3
13
73.1
74.5
-
-
80.2
83.4
85.4
85.1
82.4
81.5
79.6
74.2
-
14
71.4
72.6
73.3
77.9
79.3
83.2
84.3
84.0
82.6
81.1
73.3
76.5
78.3
1915
73.0
71.8
72.0
72.5
80.5
81.6
83.2
83.5
82.8
81.9
78.2
71.1
77.7
1916
73.6
73.1
74.0
73.8
76.3
82.5
83.1
83.3
82.0
79.4
75.4
72.4
77.4
17
73.1
70.0
73.0
74.0
76.7
81.2
83.2
82.8
82.7
80.9
74.6
69.2
76.8
18
70.7
73.1
75.4
76.9
79.6
81.5
83.3
83.8
82.5
81.3
77.2
73.1
78.2
19
69.4
71.6
76.8
74.5
79.4
81.8
82.7
84.0
82.7
82.9
77.0
75.5
78.2
1920
72.3
71.0
73.7
79.4
79.2
80.8
83.7
82.6
82.0
78.3
76.1
74.2
77.8
119
Monthly and Annual Mean Surface Water Temperatures, F
FO.VEY HOCKS LIGIlTHOnSE (continued)
Year
Jan.
Feb.
Mar.
Apr.
May
June
July
AUR.
Sept,
1921
72.4
73.8
73.7
75.4
78.3
81.3
83.6
81.3
76.2
22
23
73.7
73.3
74.5
77.3
80.1
82.5
83.9
82.7
81.0
24
1925
"■
^
:
^
78.6
81.4
83.9
85.3
84.2
1926
27
28
72.3
70.0
70.4
75.1
77.1
78.9
82.9
83.4
82.6
70.7
70.8
71.8
72.3
74.1
80.2
81.8
82.2
.
29
71.7
72.3
73.6
75.3
77.7
80.2
83.1
84.1
84.0
1930
75.5
74.4
74.4
76.0
80.1
81.3
84.0
85.4
84.2
1931
71.7
72.4
72.0
75.4
78.9
82.1
85.0
85.8
84.9
32
76.1
76.7
75.2
76.2
79.5
82.8
84.6
85.0
80.2
33
71.5
75.4
72.5
77.5
80.7
82.3
84.1
85.1
84.4
34
74.7
71.9
74.7
76.9
79.1
81.8
85.2
85.6
84.1
(49)
(50)
(50)
(51)
(53)
(53)
(53)
(53)
(52)
Mean
72.2
72.5
73.6
75.8
78.4
81.2
83.3
83.8
82.8
Oct. Nov. Dec. Ann.
78.3 76.4 74.1 77.1
80.1 76.4 75.4 78.4
82.2 77.9 73.8 -
80.2 76.3 72.4 76.8
79.8 75.3 73.0 -
79.5 77.9 75.4 77.9
81.3 77.3 74.3 79.0
82.5 78.9 78.5 79.0
78.3 74.6 72.4 78.6
81.2 78.4 76.0 79.1
82.6 77.4 75.9 79.2
(52) (52) (52)
80.3 76.7 73.6 77.8
Readings at first high water and first low water after 7 a.m., through 1922.
1925-193A, readings at 8 a.m. and 6 p.m.
Source - U3CFF, USBF
120
o
Monthly and Annual Mean Surface Water Temperatures, F
CARYSFORT REEF LIGHTHOUSE
0
25
13'15"N.
0
80 12'42"W
•
Year
Jan.
Feb.
Mar.
Apr.
May
June
July
Aug.
Sept.
Oct.
Nov.
Dec.
Ann.
1878
_
_
^
_
_
_
_
_
79.7
76.7
73.1
_
79
69.7
72.7
73.8
73.0
79.4
81.8
83.8
85.0
84.6
81.7
79.0
77.0
78.4
1880
76.2
75.7
77.1
78.4
79.8
82.5
84.6
84.6
84.1
82.0
79.9
76.7
80.1
1881
75.3
74.9
73.3
75.8
79.6
8h.O
_
.
_.
80.1
79.4
76.1 (79.3)
82
77.4
75.1
75.7
76.2
78.9
82.0
83.6
84.0
83.8
81.4
76.3
74.6
79.1
83
73.5
73.3
-
76.8
80.0
83.3
84.5
84.9
84.1
83.2
81.0
78.7 (78.8)
8U
74.1
76.4
76.9
76.9
80.3
83.2
84.8
84.3
84.0
81.5
79.1
76.3
79.8
1885
74.9
72.0
73.3
76.5
80.1
81.8
84.7
86.4
85.8
81.4
76.3
71.8
78.8
1886
70.6
70.9
72.8
75.2
79.6
82.6
83.6
83.8
82.9
81.3
75.6
73.2
77.7
87
71.9
74.8
73.0
75.1
78.5
80.7
84.7
85.6
84.2
81.5
77.0
75.3
78.5
88
75.4
74.4
73.6
76.8
78.4
81.8
84.6
85.9
84.7
81.2
78.7
74.5
79.2
89
72.5
72.8
74.1
75.0
79.1
82.4
83.0
83.5
82.4
79.2
79.9
73.5
78.1
1890
73.8
74.3
—
—
—
-
-
—
—
—
-
-
—
1891
92
~
~
—
—
—
-
—
83.0
82.8
80.0
75.3
73.6
—
93
-
74.0
72.7
75.0
79.1
81.7
84.0
84.6
83.6
79.5
77.2
75.2
(78.3)
94
72.5
73.3
73.2
74.1
76.1
79.9
82.9
85.4
84.0
78.9
77.1
74.8
77.7
1895
71.9
70.4
72.1
73.5
78.5
81.8
85.5
84.3
84.2
81.5
76.8
73.1
77.8
1896
72.2
72.3
72.0
76.4
79.0
82.0
84.0
84.8
83.4
81.2
79.2
75.0
78.4
97
73.3
73.0
75.1
76.4
77.4
82.4
84.9
85.5
83.9
81.8
77.0
76.5
78.9
98
74.6
72.0
72.8
75.5
77.4
81.5
84.4
85.2
85.4
81.2
76.9
73.5
78.4
99
70.1
76.2
76.5
76.1
78.6
80.0
84.0
85.2
84.7
81.0
76.0
74.8
78.6
1900
73.2
-
-
-
-
-
-
-
_
_
_
-
-
(19)
(19)
(17)
(18)
(18)
(18)
(17)
(18)
(18)
(20)
(20)
(20)
Uean
73.3
73.6
74.0
75.7
78.9
82.0
84.2
84.8
84.0
81.0
77.7
74.9
78.7
Readings at first high water and first low water after 7 a.m.
Source - USCFF
121
o
Monthly And Annual Mean Surface Water Temperatures, F
SOMBRERO KEY, FLORIDA 2l.°37.5.N. 8l°07.W.
Tear
Jan.
Feb.
Mar.
Apr.
May
June
July
Aug.
Sept.
Oct.
Nov.
Dec.
Ann.
1925
-
-
-
-
-
82.14
8U.5
86.1
8lt.3
82.9
78. U
7lt.7
-
1926
73.0
70.5
70.3
76.8
77.9
82.3
-
-
-
-
-
-
-
27
28
29
1930
72.U
70.9
71.U
72.2
71.9
73.1
73.8
73.U
73.9
7U.8
75.h
75.2
76.7
77.lt
81.0
82.8
79.6
82.0
8U.I4
81.2
85.6
8U.1
81.5
85.8
83.2
81.0
81t.l
81.2
81.5
7lt.6
76.7
71.7
72.1
77.6
78.5
1931
32
33
3U
69.1i
75.5
7U.5
7U.1
70.1
76.2
7U.5
72.0
68.1
73.lt
73.8
7U.2
7h.6
75.5
77.8
77.2
79.3
79.2
80.3
80.U
82.3
83.3
81.9
81.8
8U.9
86.1
8U.3
85.0
86.0
86.1
8U.2
85.2
83.2
81t.7
83.9
8U.I4
81.5
82.6
8l.lt
82.7
76.5
77.1
76.9
77.7
77.7
75.7
75.0
75.1
77.8
79.6
79.0
79.2
Mean
(8)
72.6
(8)
72.6
(8)
72.6
(8)
75.9
(8)
79.0
(9)
82,0
(8)
8U.5
(8)
8U.9
(8)
83.6
(7)
82.0
(7)
76.8
(7)
7lt.6
78.lt
Readings at 8 a.m. and 6 p.m.
Source - DSBF
122
Monthly and Annual Mean Surface Water Temperatures, F
KEY
WEST,
FLORIDA
24°33'N.
81°48''.V.
Year
Jan.
Feb.
Mar.
Apr.
May
June
July
AuF,.
Sept.
Oct.
Nov.
Dec.
Ann.
1874
.
.
.
_
_
85.6
84.4
79.4
75.6
72.3
_
1875
75.3
74.4
-
-
-
-
-
-
-
-
-
-
-
1876
^
_
_
^
.
.»
_
-
_
_
_
-
-
77
-
-
70.9
75.3
80.7
86.7
87.2
88.8
87.8
82.2
76.4
68.8
(79.2)
78
66.7
70.5
74.0
79.8
83.4
87.5
88.0
88.6
85.0
80.8
75.2
68.8
79.0
79
68.8
71.8
75.9
77.7
83.8
84.3
88.2
87.7
85.7
81.6
75.4
75.9
79.7
1880
74.1
75.8
78.8
79.5
80.7
85.8
88.0
-
-
-
-
72.0
(80.5)
1881
72.1
72.3
72.8
76.1
82.3
86.3
88.1
87.3
85.6
81.5
77.7
74.3
79.7
82
72.7
74.9
-
-
83.0
-
87.6
-
-
82. 8
76.3
72.3
(80.2)
83
73.9
77.0
75.7
82.9
82.4
86.3
88.3
87.9
86.8
83.1
77.1
74.4
81.3
84
69.7
75.2
77.8
79.9
84.1
84.6
88.1
-
-
80.3
77.0
76.0
(80.5)
1885
74.2
71.3
75.3
80.6
84.8
86.1
88.7
88.4
87.9
81.2
75.2
67.6
80.1
1886
66.7
6P.3
75.2
_
82.5
86.9
87.7
87.0
85.6
81.2
76.4
70.7
(79.0)
87
69.0
76.7
74.4
78.6
-
83.6
88.0
87.8
84.9
81.8
75.2
73.6
(79.7)
88
73.8
75.3
-
79.1
82.0
85.6
-
87.4
85.0
80.2
77.7
68.5
(79.8)
89
72.0
71.6
72.6
77.6
82.0
85.1
87.1
84.6
85.1
79.8
77.7
72.2
79.0
1890
74.0
74.4
73.7
78.5
82.7
86.2
87.1
86.3
85.8
83.4
-
-
(80.0)
(14) (14) (12) (12) (13) (13) (13) (l2) (12)
Mean 71.6 73.6 74.8 78.8 82.6 85.8 87.8 87.3 85.8
(14) (13) (14)
81.4 76.4 72.0 79.8
Walls Wharf (Gulf), 1874-81; Tift's Wharf, 1882-Feb. 1888; Philbrick's V/harf, Apr. 1888.
1874-Oct. 1879 incl., readings at 3 p.m.
Nov. 1379-June 1881 incl., readings at 1 p.m.
July 1881 etc., readings at 1:40 p.m.
Source - U3CFF
123
Monthly and Annual hcan Surface Water Temperatures, °F
DRY
TORTUGAS, Fl.ORIDA
24°38'04"N.
82055'42"W.
Year
Jan. Feb,
Mar.
Apr.
May
June
July
Auk.
Sept.
Oct.
Nov.
Dec.
Ann.
1878
.
^
83.7
79.4
74.7
,.
.
79
— —
-
-
-
-
87.0
86.8
82.8
80.6
75.8
73.9
-
1880
73.9 74.4
75.0
74.2
74.6
81.0
86.3
85.0
85.6
81.1
77.4
73.4
78.5
1881
72.4
72.0
71.4
78.7
78.2
85.2
84.8
84.0
82.5
81.2
77.4
(78.3)
82
74.2 73.6
77.3
77.2
75.3
81.8
84.0
83.3
83.2
80.8
76.2
70.9
78.2
83
73.2 73.1
73.2
74.9
79.0
81.6
83.4
84.2
83.9
82.4
78.8
77.0
78.7
84
72.5 73.4
75.6
-
-
-
-
-
-
-
75.0
76.9
-
1885
74.4 73.9
73.8
75.3
77.6
80.6
82.8
84.4
82.9
77.4
73.9
71.8
77.4
1886
72.3 71.3
70.7
73.0
78.0
80.5
82.6
84.0
82.5
81.9
79.9
73.4
77.5
87
- -
73.5
67.9
78.7
80.4
83.8
85.0
84.3
80.1
-
73.8
-
88
71.2
-
-
79.3
81.2
83.1
85.7
84.5
81.3
79.1
73.6
-
89
73.8 73.3
71.2
71.4
76.2
82.2
85.3
84.0
84.2
80.3
78.9
73.7
77.9
1890
75.9 75.2
74.2
75.4
79.7
80.4
84.6
84.6
84.4
83.0
78.1
73.3
79.1
1891
70.1 75.5
75.0
73.6
76.2
80.1
85.2
85.2
84.2
78.3
74.4
74.5
77.9
92
73.6 73.3
73.2
76.6
79.3
81.3
83.1
85.9
85.3
80.2
73.8
71.8
78.1
93
68.0 73.0
75.4
77.2
80.9
83.3
85.8
86.5
85.3
82.0
78.2
74.0
79.1
94
73.2 72.4
74.3
77.3
79.4
81.5
83.8
85.4
84.2
78.6
73.5
72.5
78.0
1895
71.4 67.8
73.4
75.0
80.1
81.0
84.2
84.9
84.6
80.6
77.0
73.1
77.8
1896
70.2 70.2
70.4
75.2
79.4
82.2
82.7
85.8
84.5
81.1
78.7
74.0
77.9
97
70.6 71.8
75.1
76.4
78.2
82.8
84.7
85.5
83.3
80.6
76.8
73.7
78.3
98
71.7 71.5
75.0
76.8
79.7
83.2
84.7
85.9
84.8
81.6
77.1
72.5
78.7
99
73.3 70.1
71.6
75.4
80.7
83.6
84.3
85.8
85.4
81.7
76.4
73.3
78.5
1900
69.2 68.2
72.4
74.8
77.1
81.8
83.6
84.6
83.5
82.8
78.2
73.5
77.5
1901
71.4 71.9
70.8
74.1
79.4
83.6
83.8
84.1
84.1
81.4
75.7
71.2
77.6
02
67.4 69.6
71.8
73.9
77.7
81.4
84.5
85.5
84.5
82.6
76.5
72.6
77.3
03
69.4 72.8
75.3
-
78.1
82.4
83.9
86.1
84.8
80.0
76.2
71.2
-
04
70.1 72.3
74.8
77.4
78.0
82.0
82.6
83.7
84.4
81.0
74.6
72.9
77.8
1905
68.6 72.2
73.8
74.4
79.5
82.8
84.5
85.5
84.8
82.4
78.4
-
-
1906
69.0 70.0
71.5
74.3
82.4
82.8
85.2
85.0
84.8
80.2
76.4
72.3
77.8
07
71.0 71.4
-
-
-
-
-
-
-
-
-
-
-
(25) (27) (26) (24) (26) (26) (27) (27) (28) (28) (28) (27)
Mean 71.5 72.1 73.5 74.7 78.6 81.7 84.2 85.1 84.2 80.9 76.8 73.4 78.0
Loggerhead Key, 60 ft. off beach.
Readings at first high water and first low water after 7 a.m.
Source - USCFF
12U
Monthly and Annual Meun Surface Water Temperatures, °F
DRY TORTUGAS LIGHT rXATION, FLORIDA 24°38'04"N. 82°55'42"W.
Year Jan. Feb. Mar. Apr. May June July Aug. Sept. Oct. Nov. Dec. Ann.
1925 - - - - - 81.9 83.6 84.7 84.0 81.0 76.8 73.0 -
1926 70.0 67.9 67.5 71.7 76.4 78.9 80.1 83.1 83.4 81.2 76.2 74.3 75.9
28 71.5 - 73.6 74.2 76.2 83.5 84.6 84.4 85.0 83.2 76.5 72.2 (78.1)
29 71.7 73.7 73.9 79.6 80.6 81.7 83.0 - - 76.9 77.0 -
1930 70.172.1 74.2 74.5 80.7 82.1 85.2 85.2 83.9 81.0 74.7 71.8 78.0
1931 66.0 69.5 71.8 73.2 79.0 83.2 84.7 84.6 84.4 81.8 76.6 78.8 77.8
32 74.3 77.8 74.5 74.8 80.3 83.2 85.2 85.2 84.8 84.7 75.7 74.4 79.6
33 76.2 73.3 74.5 80.1 80.4 82.8 85.8 85-9 85.1 82.5 78.1 72.5 79.8
34 72.2 69.8 72.6 75.2 79.8 80.0 85.0 84.3 83.4 81.6 74.4 73.4 77.6
(8) (7) (8) (8) (8) (9) (9) (8) (8) (9) (9) (8)
Mean 71.5 72.0 72.8 75.4 79.2 81.9 84.1 84.7 84.2 81.5 76.2 73.8 78.1
Readings at 8 a.m. and 6 p.m.
Source - USBF
125
o
Montlily and Annual Mean Surface Water Temperatures, F
PUNTA RASSA, FLORIDA 26 29'N, 82 Ol'W.
Year
Jan
Feb,
Mar.
Apr.
May
June
July
Aug.
Sept.
Oct.
Nov.
Dec.
Ann.
1873
7U
1375
66.2
75.1
70.3
76.8
79.3
82.5
86.9
-
-
-
-
70.8
7U.2
70.1
69.3
-
1876
77
78
79
1330
62. U
6ii.2
70.2
6H.0
67.1
72.5
73.5
76.U
75. U
78.U
75.3
77.7
83.9
82.1
80.2
82.3
87.6
85.0
86.0
8U.0
85.8
87.U
83.1
82.3
88.5
87.0
81i.7
85.6
8U.6
8h.6
8h.7
81.8
79.8
78.2
72.8
76.6
6U.8
67. U
-
1381
82
83
66.2
70.5
68.8
65.8
72.0
75.6
68.7
73.9
81.3
81.3
82.7
82.U
86.8
89.2
87.7
86.8
87.6
86.3
81.U
82.3
75.6
72.5
70.3
65.8
77.7
Mean
(8)
68.0
(6)
69.1
(5)
73.6
(6)
77.3
(8)
31.6
(6)
85.8
(6)
87.0
(6)
86.2
(5)
85.2
(5)
80.7
(6)
73.8
(6)
68.0
78.0
End of rtlharf - 300 yards from station
" " 175 " " " July 1877
" " 300 " " " Oct. 1877
" " 335 " " " Jan. I878
1873-Oct. 1879 incl., readings at 3 p.m.
1880-June 1881 incl., readings at 1 p.m.
July 1881 etc., readings at 1:A0 p.m.
Source - USCFF
126
Monthly and Annual Mean Surface Water Temperatures, °F
EaONT KEY 27°36'N. 82°46'W.
Year Jan. Feb. Mar. Apr. May June July Aug. Sept. Oct. Nov. Uec . Ann.
1925 - - - _ - _ _ 83.4 - 79.1 68.6 61.4 -
1926 59.0 62.4 63.5 70.6 74.5 81.5 84.8 - - - 66.5 65.9 (72.9)
28 56.3 61.1 67.2 72.4 76.0 83.8 86.0 84.1 82.9 80.4 68.5 62.5 73.4
29 63.0 65.8 71.0 76.2 81.3 83.0 83.8 86.1 83.3 77.3 - 62.0 (75.1)
1930 61.5 63.0 65.1 70.7 79.8 80.0 86.1 86.3 83.6 75.5 68.0 59.6 73.3
1931 56.4 59.3 60.4 68.2 77.0 81.8 85.8 86.3 83.9 77.3 70.0 72.8 73.3
32 67.4 72.0 64.9 69.9 77.4 82.3 87.5 86.3 82.2 78.2 68.2 63.3 75.0
33 63.6 64.7 64.5 72.4 78.8 81.4 82.6 84.0 83.5 77.2 67.0 65.8 73.8
34 61.7 60.2 63.5 71.3 76.8 80.3 83.2 84.2 81.2 78.3 66.9 62.2 72.5
(8) (8) (8) (8) (8) (8) (8) (8) (7) (8) (8) (9)
Mean 61.1 63.6 65. 0 71.5 77.7 81.8 85.0 85.1 82.9 77.9 68.0 63.9 73.6
Readings at 8 a.m. and 6 p.m.
Source - USBF
127
Monthly and Annual Mean Surface rfVater Temperatures, °F
ANCLOTE KEYS, FLORIDA 28° 10' N- 82° 51' W.
Year Jan. Feb, Mar. Apr. May June July Aug. Sept. Oct. Nov. Dec. Ann.
190iV ------- 82.9 82.9 76.8 - 59.8 -
05 50.Z* 55.2 67.0 71.2 83.6 86.0 85.8 83.8 84.3 76.4 66.0 59.0 72.4
1906 53.2 57.6 66.3 71.4 - 86.4 86.7 84.5 81.3 - - - -
(1) (2) (2) (2) (1) (2) (2) (3) (3) (2) (1) (2)
Mean 53.2 56.4 66.6 71.3 83.6 86.2 86.2 83.7 82.8 76.6 66.0 59.4 72.7
Readings at first high water and first low water after 7 a.m.
Source - USBF
128
Monthly and Annual Mean Surface y/ater Temperatures, °F
CEDAR KEYS, FLORIDA
29°08'N. 83002 nv.
Year Jan. Feb. Mar. Apr. May .Tnnp. .Tnly Aug. Sept. Oct. Nov. Dec. Ann.
1879
80
65.0 63.4
71.3
1881
82
83
84
1885
- 57.5
64.4 -
60.7 70.9
56.1 67.1
58.4 58.0
59.2
66.0
69.9
63.1
1886
87
88
51.5 56.3
54.4 70.2
59.7
65.0
89
1890
59.1 58.3
70.9 67.6
64.2
64.3
Mean
(9) (9)
60.1 63.2
(9)
64.7
74.2 78.5 82.5 85.3 83.5 81.6
66.1 78.6 82.6 86.3 84.7 83.8
77.8 - 83.9 84.8 83.4
75.9 79.4 86.8 - 89.1 85.4
81.9 - - -
73.0 78.6 85.3 86.6 86.0 84.9
67.9 75.9 83.4 83.4 84.5 83-7
76.2 79.3 81.9 - - 81.6
- - - 87.5 86.8 81.1
73.2 79.9 84.3 85.7 83.0 84.3
(7) (8) (8) (7) (8) (9)
72.4 78.5 83.6 85.5 85.3 83.3
67.5 -
72.7 - 59.4 (73.8)
78.9 70.9 63.2 (72.7)
78.4 66.6 59.2 -
81.1 70.7 66.7 (76.5)
76.7 - - -
73.8 65.9 54.2 72.3
78.1 65.3 57.5 70.6
76.1 76.0 -
74.7 67.6 57.1 -
74.6 68.5 68.9 73.7
(10) (8) (9)
76.5 68.9 61.5 73.6
South side - RR ?;harf . East Coast to Gulf of Mexico. Jan. '89, foot of
wharf opposite RR station.
1879-June 1881 incl., readings at 1 p.m.
July 1881-Dec. 1881 incl., readings at 2 p.m.
Jan. 1882 etc., at 2 p.m. Washington time.
Source - USGFF
129
o
Monthly and Annual Mean Surface Water Temperatures, F
ST. MARKS, FLORIDA 30 09'N. 6U 12'W.
Year
Jan.
Feb.
Mar.
Apr.
May
June
July
Aug.
Sept.
Oct.
Nov.
Dec.
1877
78
79
56.lt
59.8
60.1
6U.'4
65.9
67.6
68.7
69.5
68.6
72. U
73.2
73.3
76.5
77.1
76.2
79.2
79.9
77.8
76.7
78.5
75.5
76.7
75.9
73.3
70.6
70.9
71.0
6h.7
65.7
58.9
59.7
Mean
(2)
58.1
(1)
60.1
(3)
66.0
(3)
68.9
(3)
73.0
(3)
76.6
(3)
79.0
(3)
76.9
(3)
75.3
(3)
70.8
(2)
65.2
(2)
59.3
69. U
(69.0)
69.1
Wharf in river 9 miles from Gulf of Mexico
Readings at 3 p.m.
Source - DSCFF
130
o
Monthly and annual Mean Surface Water Tenperatures, F
CAPE ST. GEORGE LIGHT STATION, APALACHICOLA, FLA. 29 13'N. 85 03'W.
Year Jan. Feb. Mar. Apr. May June July ^'Ug. Sept. Oct. Nov. Dec. Ann.
1930 56.6 59.2 60.6 69.2 78.6 80.1 85-4 84.5 83-2 71.8 63.3 55.6 70.7
1931 53.2 59.2 58.8 66.6 74.0 81.7 85.8 84.0 83.6 76.4 68.4 68.2 71.6
32 64.2 67.4 61.9 69.3 75.8 82.4 85.6 83.7 81.0 74.0 62.8 - (72.5)
33 58.1 58.6 62.5 68.8 80.0 81.8 83.6 84.8 84.2 74.4 63.5 63.3 72.0
(4) (4) (4) (4) (4) (4) (4) (4) (4) (4) (4) (3)
Mean 58.0 61.1 61.0 68.5 77.1 81.5 85.1 84.2 83.0 74.2 64.5 62.4 71.7
South tip of St. George Island
Readings at 8 a.m. and 6 p.m.
Source - USBF
131
Monthly and Annaal Mean Surface Water Temperatures, F
PENSACOLA, FLORIDA
30 2U'N. 87 13'W.
Year Jan. Feb. Mar. Apr. May June July Aug. Sept
Oct. Nov. Dec. Ann,
1831
^
^
.
67.7
_
85.2
87.0
8U.3
78.6
66.3
61.2
(72.1)
82
61. U
61.2
-
-
76.7
-
82.7
83. li
80.3
7h.6
66.3
55.3
(71.5)
83
5U.7
6U.1
61.5
72.2
77.2
83.6
86.0
85.8
81.9
78.0
6k.8
60.I4
72.5
8U
50.2
62.6
65.0
-
79.2
80. I4
-
85.U
M
77.2
63.0
(71.'4)
1885
5U.1
53.7
58.3
70.0
76.1
8U.7
86.2
86.2
83.0
72.1
63.7
5U.6
70.3
1886 U9.3 53.7
87 51.7 6U.1
88 58.7 60.9
89 55.2 51i.9
60.5 68.7 77.3 83.8
6U.6 70.1i 78.7 82.0
61.5 72.7 77.1 82.9
61.7 - 76.3 81.7
8U.8 8ij.9 81.5
85.5 85.1 81.2
85.0 31.0
73.6 6U.0 5U.5 69.3
72.9 66.3 - (71.6)
73.5 65.3 55.9 (71.7)
(70.3)
Mean
(8)
51i.5
(8)
59.14
(7)
61.9
(6)
70.3
(8)
77. U
(8)
83.0
(6)
85.U
(8)
85.0
(6)
81.6
(3)
75.1
(8)
65.1
(6)
57.0
71.3
Palaf ox Wharf
Readings at 2 p.m. 75th meridian time
Sotirce - USCFF
132
o
Monthly and Annual Mean Surface VJater Tanperatures, F
o o
FENSACOLA LICMTHOUSE, FLORIDA 30 20.7' N. 87 13 .4' W.
Year Jan. Feb. Mar. Apr. May June July Auj;. Sept. Oct. Not. Dec. Ann.
1930 52.0 54.5 53.2 52.3 67.0 80.4 81.6 82.9 80.0 79.0 68.4 47.4 66.6
1931 46.4 49.8 49.8 ------ ---_
(2) (2) (2) (1) (1) (1) (1) (1) (1) (1) (1) (1)
Mean 49.2 52.2 51.5 52.3 67.0 80.4 81.6 82.9 80.0 79.0 68.4 47.4 66.0
On mainland opposite channel opening into Pensacola Bay.
Readings at 8 a.m. and 6 p.m.
Source - OSBF
133
o
konthly and Annual Mean Surface Water Tenperatures, F
o o
SAND ISLAND LIGHT STATIC*!, lOBILE BAY, ALABAMA 30 11.2.'N^8 02'W.
Year Jan. Feb. liar. Apr. May June July Aug. Sept. Oct. Nov. Dec. Ann.
1930
54.5
56.2
57.6
65.8
75.2
78.0
82.0
82.2
80.0
71.2
62.0
54.8
68.3
1931
32
33
51.6
61.4
54.0
56.6
6-4.2
54.4
58.6
61.2
59.6
64.2
66.8
65.7
71.8
74.6
77.8
78.4
81.6
79.6
82.8
84.4
79.8
83.0
82.0
83.5
85.0
77.8
82.6
77.6
69.5
74.4
70.0
59.4
63.8
65.9
64.6
63.0
70.4
70.6
69.8
Uean
(4)
55.4
(4)
57.8
(4)
59.2
(4)
65.6
(4)
74.8
(4)
79.4
(4)
82.2
(4)
82.7
(4)
81.4
(4)
73.2
(4)
63.8
(4)
62.1
69.8
Readings at 8 a.m. and 6 p.m.
Source - USBF
13^;
Monthly and Annual Mean Surface Water Temperatvires, F
MOBILE, ALABAMA 30 4.2' N. 88°02'W.
Year Jan. Feb. Mar. Apr. May June July Aug. Sept. Oct. Nov. Dee. Ann.
1873 80.9 71.7 60.3 56.0 -
Ik 50.0 5^.6 60.ii bU.k 70.5 33.1 83.8 86.2 82.8 74.1 6^.9 55.3 69.2
1875 50.3 51.4 -.--
1876 >_..
77 - - 56.6 63.5 72,0 82.1 86.8 85.8 80.0 70.5 60. 8 52.4 (67.8)
78 48.7 51.8 61.0 68.4 73.8 82.0 86.4 86.3 81.6 75.2 63.3 51.0 69.1
79 46.5 53.0 59.2 65.5 76,0 81.9 85.6 83.4 80,9 75,1 64.2 55.0 68.8
1880 57.2 54.4 63,4 67.2 73.8 81.6 85.2 85.3 - 72.1 - 51.3 (69.7)
1881 46.2 - 57.8 62.5 - 85.9 88.2 85.4 84.2 78.7 64.1 55.7 (69.6)
82 53.8 56.2 - - 73.2 - 83.3 83,1 80.0 76,6 65.9 51.3 (69.1)
83 51.0 57.2 58,1 68,1 74.0 82.3 87.6 88,6 85.5 79.3 65.0 57.6 71.2
84 47.6 55.2 59.6 66.3 74.7 - - - - 79.1 63.2 55.6 (69.8)
1885 54.8 54.6 53.7 65.6 - 82.5 86.4 86.1 82.3 70.4 60.I 50.0 (68.3)
1886 45.1 47.7 55.8 63.5 72.9 81.4 82.0 86.5 83.0 75.3 62.7 49.6 67.1
87 41.1 52.8 54.9 - --.-
(12) (11) (11) (10) (9) (9) (10) (10) (10) (12) (11) (12)
Mean 49.4 53.5 58.2 65.5 73.4 82.5 85.5 85.7 82.1 74.8 63.1 53.4 68.9
Foot of Government Street
1873-Aug. 1880 incl., readings at 3 p.m. local time.
Sept, 1880-June 1881 incl., readings at 1 p,m.
July 1881 etc., readings at 2 p.m. Vfashington time.
Source - USCFF
135
0
Monthly and Unnvial Mean Surface Water Temperatures, p
o
MONTGOMERY, 4HB/VMA 32 Ol'N. 86°02'W.
Year Jan. Feb. Mar. Apr. Mav June July Aug. Sept. Oct. Nov. Dee. Ann.
1873 ------- 83.8 79.9 70.1 56.0 55.5 -
lU 50.U 53.U - - - 80.il 82.2 8^.2 78.7 69.0 61.0 51.5 -
1875 --------- ----
1876 - -- ..--
77 ^.1 - - 62.6 - 81.6 86.0 82,. 9 78.2 69.1 57.6 50.3 -
78 A6.7 A9.9 60.2 68.0 ----- -__-
(3) (2) (1) (2) - (2) (2) (3) (3) (3) (3) (3)
Mean ^8.2^ 51.6 60.2 65.3 - 81.0 ^U.l Bk.3 78.9 69.4 58.2 52.Z. -
Wharf
30 ft. from center of channel; June, 1874 - Pier at foot of Commercial Street.
Readings at 3 p.m. local time.
Source - U3CFF
136
o
Monthly and Annual Mean Surface Water Temperatures, F
o o
SHIP ISUND LIGHTHOUSE, UISSISSIPPI 30]>'N. 88 58'W.
Year Jan. Feb. Mar. Apr. May June July Au^. Sept. Oct. Nov. Dec. Ann.
1930 48.3 53.7 54.6 66.2 74.0 76.8 81.8 80.6 78.6 66.0 56.6 48.2 65.4
1931 46.4 53.3 52.8 61.6 59.6 80.0 82.8 79.4 79-6 71.0 64.2 57.8 65.7
32 53.7 57.2 51.4 63.8 71.0 81.5 - - - _ _ - -
(3) (3) (3) (3) (3) (3) (2) (2) (2) (2) (2) (2)
Mean 49.5 54.7 52.9 63.9 68.2 79.4 82.3 80.0 79.1 68.5 60.4 53.0 66.0
Readings at 8 a.m. and 6 p.m.
Source - DSBF
P7
o
Monthly and Annual Mean Surface Water Taupe ratu res, F
o o
CHANDELEUR, LOUISIANA 30 03'N. 88 52 'W.
Year Jan. Feb. Mar. Apr. May June July Aug. Sept. Oct. Nov. Dec. Ann .
1904 - - - - -- - - 88. 3 -63.7--
1905 48.4 54.6 61.4 68.4 82.1 84.2 83.9 85.6 83.4 73.6 65.8 52.7 70.3
1906 54.2 54.5 60.4 70.4 75-3 85.9 84-4 -
Mean 51.3 54.6 60.9 69.4 78.7 85.0 84.2 85.6 85.8 73.6 64.8 52.7 70.6
Readings at first high water and first low water after 7 a.m.
Source - U3BF
138
o
Monthly and Annual Mean Surface Water Temperatures, F
o 0
SOUTH PASS, LOUISIANA 29 OO'IT. 89 09' W,
Year Jan. Feb, liar. Apr. May June July Aug. Sept. Oct. Nov. Dec. Ann.
1933 54.0 56.6 59.4 66.0 76.1 81.0 _ - - _ _ _ _
Near southern end of South Pass.
Readings at 8 a.m. and 6 p.m.
Sourca - DSBF
139
o
Monthly and Annual Mean Surface Water Ten^wratures, F
O 0
PORT EADS, LOUISIANA 29 Ol'N. 89 lO'W.
Year Jan. Feb. Mar, Apr. May June July Aug. Sept. Oct. Nov. Dec. Ann.
1881 - - - 55.1 69.0 81.0 84.9 85.5 8^.5 77.6 60.1 46.6 -
82 46.2 49.3 ----- 81.7 80.8 75.8 67.3 50.0 -
83 44.6 44.0 50.0 ------ ____
(2) (2) (1) (1) (1) (1) (1) (2) (2) (2) (2) (2)
Mean 45.4 46.6 50.0 55.1 69.0 81.0 84.9 83.6 82.6 76.7 63.7 48.3 65.6
Front of Headquarters Hotel Building.
Readings at 1 p.m.
Source - USCFF
UQ
o
Monthly and Annual Mean Surface VJater Temperatui^s, F
o o
SHIP SHOAL LIGHT STATION, LOUISIANA 28 55'N. 91 OU'W.
Year Jan. Feb. Mar, Apr. May June July Aug. Sept. Oct. Nov. Dec. Ann.
190U 8U.9 - 78.3 61.1 -
1905 56.2 56.7 65.9 73.8 81.9 85.1 85.2 - - _ - - _
Readings at first high water and first low water after 7 a.m.
Source - U3BF
la
o
Monthly and Annual Mean Surface Water Temperatures, F
o o
OYSTER BAYOU LIGHT STATION, LOUISIANA 29 13'N. 91 08'W.
Year Jan. Feb. Mar. Apr. May June July Aug. Sept. Oct. Nov. Dec. Ann.
1930 52.8 60.5 60.4 71.1 75.4 79.6 85.4 84.0 80.4 70.0 59-5 50.3 69.1
1931 49.2 56.8 54.9 64.1 73.0 80.4 82.8 80.3 81.6 74.0 67.1 60.6 68.7
32 58.2 63.7 57.6 68.6 73.4 81.6 83.8 86.0 80.2 69.6 57.2 - (69.7)
33 56.6 55.3 61.6 68.4 78.4 79-2 81.0 82.9 82.3 71.2 61.5 61.6 70.0
34 56.6 54.2 59.4 68.9 74.1 81.0 83.2 84.4 80.2 74.3 64.8 53.7 69.6
(5) (5) (5) (5) (5) (5) (5) (5) (5) (5) (5) (4)
Mean 54.7 58.1 58.8 68.2 74.9 80.4 83.2 83.5 80.9 71.8 62.0 56.6 69.4
Readings at 8 a.m. and 6 p.m.
Source - USBF
U2
o
Monthly and Annual Mean Surface Water Temperatures, F
0 o
POINT AU FER REEF UGHT STATION, LOUISIANA 29 22.4.'N. 91 23.1'W.
Year Jan. Feb. Mar. Apr. May June July Auj; . Sept. Oct. Nov. Dec. Ann.
1930 64.6 66.6 69.8 79.0 78.1 81.1 85.0 84.4 81.0 72.0 61.0 52.8 73.0
1931 50.6 58.6 57.4 65.8 74.5 82.9 85.6 83.3 83.6 76.1 68.7 60.4 70.6
32 58.7 61.8 57.4 70.2 75.0 83.7 86.0 85.0 80.5 70.2 57.4 - (70.3)
33 54.0 52.8 59.8 66.4 76.6 78.6 80.8 82.4 82.6 72.3 62.2 61.2 70.8
(4) (4) (4) (4) (4) (4) (4) (4) (4) (4) (4) (3)
Mean 57.0 60.0 61.1 70.4 76.0 81.5 84.4 83.8 81.9 72.6 62.3 58.1 70.8
Shell reef (4 miles NNW of Pt. Au Fer) Station on left side of ship channel to
Morgan City.
Readings at 8 a.m. and 6 p.m.
Source - DSBF
U3
0
Monthly and Annual Mean Surface Water Ten^B ratures, F
o o
SABINE PASS LIGHT STATION, LOUISIANA 29^2.9'N. 93 51.3')l.
Year Jan. Feb. Mar. Apr. May June July j^ur. Sept. Oct. Nov. Dec. Ann.
1930 53.2 62.6 61.9 73.4 78.2 82.1 86.4 86.0 81.6 73.5 63.0 56.0 71.5
1931 55.8 62.1 60.8 69.2 77.0 84.6 86.5 83.8 84.5 78.8 - 58.1 (72.0)
32 59.3 64.2 59.3 75.2 78.0 83.5 87.0 85.0 80.8 71.0 58.6 53.6 71.3
33 59.4 56.6 64.2 71.0 80.6 81.5 84.4 86.4 82.8 76.1 66.9 64.6 72.9
34 57.2 56.8 62.8 73.0 77.1 84.9 85.2 87.0 82.8 77.4 64.8 55.4 72.0
(5) (5) (5) )5) (5) (5) (5) (5) (5) (5) (4) (5)
Mean 57.0 60.5 61.8 72.4 78.2 83.3 85.9 85.6 82.5 75.4 63.3 57.5 72.0
On Louisiana side of Sabine River, 2 miles from open Gulf.
Readings at 8 a.m. and 6 p.m.
Source - USBF
lU
o
Monthly and Annual iiean Surface Water Temperatures, F
o o
SHREVEPORT, LOUISIANA 32 30'N. 93 U5'W,
Year Jan. Feb. Mar. Apr. May June July Aug. Sept. Oct. Nov. Dec. Ann.
1873 69.lj 56.6 -
7h U7.2 52.2 58.6 62.0 73.0 83.7 87.6 90.1 82.6 71.5 61. ij 52.8 68.6
1875 U2.5 U8.2 -- .-..
1876 -- ..-_
77 - - - 68.6 76.2 8U.9 90.0 91.2 82.9 7U.0 57.8 51.8 (69.7)
78 U8.5 52.1 65.5 -.__
(3) (3) (2) (2) (2) (2) (2) (2) (2) (3) (3) (2)
Mean li6.1 50.8 62.0 65.3 71.6 8U.3 88.8 90.7 82.8 71.6 58.6 52.3 69.0
Near river gauge. Red River
Readings at 3 p.m.
Source - U3CFF
U5
o
Monthly and Annual Mean Surface Water Tonperatures, F
o o
HEALD BANK LIGHTSHIP 29 08'N. 94 lO'W.
Year Jan. Feb. Mar. Apr. Usj' June July Aug. Sept. Oct. Nov. Dec. Ann.
1930 66.4 67.7 67.2 74.4 78.8 84.2 - - - - 67.7 60.0 -
1931 55.4 - 55.9 60.8 71.0 80.5 - - - _ _ _ _
34- - - - -- - - - - 75. 9 61.2-
1935 61.4 60.0 63.3 71.6 74.4- - - - -_-_
Readings at 8 a.m. and 6 p.m.
Source - DSBF
U6
o_
Monthly and Annual Mean Surface ,'iaUT Temperatures, r
GALVESTON ENTRANCK LIGHTSHIP 29°20.8'N. 94°43.0'W.
Year Jan. Feb. Mar. Apr. May June July Aug. Sept. Oct. Nov. Dec. Ann.
1904 - - - - -- - - 83.8 76.9 - 57.0 -
1905 51.7 46.5 62.4 70.6 78.9 82.4 82.8 84.8 - _ _ _ _
Readings at first high water and first low water after 7 a.m.
Source - USBF
U7
Monthly and Annual Mean Surface V/ater Tanperatures, F
GALVESTON,
TEXAS
29°19'N.
94°48«W
Year
Jan.
Feb.
Uar.
Apr.
May
June
July
Au^.
Sept.
Oct.
Nov.
Dec.
Aim.
1873
74
1875
54.8
51.2
58.2
55.4
-
68.0
76.9
84.7
-
88.0
81.7
82.3
71.6
74.8
61.0
67.1
56.4
60.9
(72.2)
1876
77
78
79
1880
53.4
49.5
64.3
57.2
57.8
58.1
67.2
68.2
64.9
73.3
72.6
80.2
79.1
83.9
82.8
82.4
88.4
86.4
87.0
89.1
84.6
84.6
84.7
83.8
79.4
81.4
80.6
75.1
76.9
75.8
72.0
62.0
64.4
67.1
56.6
56.4
53.3
59.0
55.4
(71.8)
(71.6)
(72.0)
(71.5)
1881
82
46.8
55.3
62.7
70.3
80.2
86.6
86.6
86.2
82.0
-
-
-
(70.9)
83
84
1885
-
52.6
61.2
72.6
78.2
86.1
87.7
87.4
82.1
71.8
63.0
66.4
56.8
(71.3)
1886
87
47.8
51.2
53.6
64.4
61.0
69.3
72.0
77.6
78.5
84.6
83.2
86.5
86.7
86.1
86.7
81.9
81.8
73.5
70.8
61.9
64.8
58.1
70.2
(71.8)
Mean
(8)
52.4
(9)
57.0
(6)
64.2
(7)
71.2
(7)
78.7
(8)
84.3
(7)
87.0
(9)
86.4
(10)
81.7
(9)
73.6
(10)
63.4
(8)
57.0
71.4
New York Steamship Viharf at foot of 24th Street, 1873-75. Foot of Tremont Street;
22nd Street, 21st Street.
1873-Oct. 1879 inol., readings at 3 p.m.
Nov. 1879-Jtine 1831 incl,, readings at 1 p.m.
July 1881 etc., readings at 2 p.m. Washington time.
Source - USCFF
UB
o
Monthly and Annual Mean Surface Water Temperatures, F
O; O
GALVESTON, TEXIS 29 19.6'N. 9-^ ^1.5.' ff.
Year Jan. Feb. Mar. Apr. May Jiuie July Aug. Sept. Oct. Nov. Dee. Ann^
1930 50.8 57.6 59.7 69.3 76.0 80.A J^4.2 85.0 81.2 71.1 62.4 - (69.8)
77.4 70.0 58.8 70.0
72.4 62.0 53.6 70.8
77.3 68.6 66.1 72.6
78.0 69.7 58.8 72.2
(5) (5) (5) (5) (5) (5) (5) (5) (5) (5) (5) (4)
Mean 55.9 58.4 5^.8 67.9 75.9 81.7 84.5 84.6 82.7 75.2 66.5 59.3 71.0
it end of pier on Galveston Island.
Readings at 8 a.m. and 6 p.m.
Source - USBF
1931
52.1
57.2
57.1
63.2
71.7
80.8
85.0
82.8
84.0
32
59.S
63.6
59.4
68.7
75.8
81.7
85.8
85.0
81.9
33
57.6
55.4
61.6
68.8
79.2
82.4
83.6
85.6
84.8
34
59.6
58.4
61.2
69.4
77.0
83.4
83.9
84.8
81.7
U9
o
Monthly and Annual Mean Surface Water Temperatures, F
o o
HALF MOON REEF LIGHT STATION, MATAGORDA BAY, TEXAS 28 32.3'N. 96 15.^'W.
Year Jan. Feb. Mar. Apr. May June July Aug. Sept. Oct. Nov. Dec. Ann.
1930 45.5 59.4 60.2 71.2 75.8 81.4 83.6 84-5 80.6 72.2 63.6 54.6 69.4
1931 53.2 61.5 60.4 66.1 74.0 82.5 85.6 84.2 83.8 79.6 70.3 57.2 71.5
32 59.0 63.8 59.4 71.4 77.4 83.4 85-3 85.0 81.6 72.4 60.4 52.8 71.0
33 58.9 55.2 64.2 70.0 79.4 81.0 83.8 84.0 83.7 76.0 - 66.2 (72.3)
34 58.8 56.8 59.9 - 74.0 80.0 83.0 83.5 82,4 - - - (70.5)
1935 58.2 57.9 65.8 ------ _---
(6) (6) (6) (4) (5) (5) (5) (5) (5) (4) (3) (4)
Mean 55.6 59.1 61.6 69.7 76.1 81.7 84.3 84.2 82.4 75.0 64.8 57.7 71.0
Oyster built reef abcut 3 miles SW of Palacios Point.
Readings at 8 a.m. and 6 p.m.
Source - USBF
150
Monthly and Annual Mean Sirface Water Tanperatures, F
INDIaNOLA, TEXAS 3°36'N. 46°30'W
Year
Jan.
Feb.
Mar.
Apr.
May
June
July
AUK.
Sept.
Oct.
Nov.
Dec.
Ann.
1873
_
.
83.2
73.5
.
_
_
74
-
-
-
-
78.1
84.1
-
84.9
82.6
77.3
68.0
61.2
-
1875
47.6
57.3
-
-
-
-
-
-
-
-
-
-
-
1876
77
78
1876 ■
- 1880
Data M
is sing
79
1880
1881
.
.
.
72.3
_
_
87.0
86.8
82.7
79.4
63.4
59.8
«
82
59.7
65.1
-
-
77.4
-
85.6
85.0
81.2
78.2
67.1
57.4
(73.2)
83
-
53.7
65.8
72.5
78.5
85.4
85.6
87.8
81.9
79.6
67.6
60.5
(72.4)
84
46.3
60.7
65.9
69.2
-
-
87.9
-
84.9
77.6
65.2
-
(72.2)
1885
47.7
52.9
62.4
73.6
77.5
84.8
86.8
86.3
83.2
72.8
69.0
58.7
71.3
1886
47.2
54.9
-
-
-
-
-
-
-
-
-
-
-
(5)
(6)
(3)
(4)
(4)
(3)
(5)
(5)
(7)
(7)
(6)
(5)
Mean
49.7
57.4
64.7
71.9
77.9
84.8
86.6
86.2
82.8
76.9
66.7
59.5
72.1
Moiigan iVharf in Matagorda Bay. Dec. 1881, 500 yards from shore.
Station destroyed August 1886
1873-1875, readings at 3:45 p.m.
1881-1886, readings at 2 p.m., 75th meridian time.
Source - USCFF
151
o
Uonthly and Annual Mean Surface Water Temperatures, F
o o
PCmT ARANSAS (PASS), TEXAS 27 50'N. 97 02'W.
Year Jan. Feb. Mar. Apr. Maar June July ^R. Sept. Oct. Nov. Dec. Ann.
1930 49.2 61.2 62.4 73.9 79.6 83.9 87.1 86.3 - 74.6 64.6 55.8 72.0
1931 56.0 61.6 63.2 69.2 76.8 83.8 87.4 85.6 85.0 79.8 71.1 59.0 73.2
(2) (2) (2) (2) (2) (2) (2) (2) (1) (2) (2) (2)
Mean 52.6 61.4 62.8 71.6 78.2 83.8 87.2 86.0 85.0 77.2 67.8 57-4 72.6
Station on pass is of doubtful location, not definitely known.
Readings at 8 a.m. and 6 p,m.
Source - DSBF
152
o
Monthly and Annual Mean Surface Water Temperatures, F
o o
ARANSAS PASS LIGHT STATION (HARBOR ISLAND), TEXAS 27 51.S'N. 97 03.2'W.
Year Jan. Feb. Mar. Apr. May Jtine July Auj;. Sept. Oct. Nov. Dec. Ann.
1932 60.8 64.1 61.5 73-3 80.2 85.0 87.4 86.3 82.0 73-6 62.8 54.8 72.6
33 61.4 58.6 69.5 75.2 80.4 85.8 86.6 87.1 85.4 78.2 67.8 68.2 75.4
34 61.4 59.4 63.6 73.8 80.6 85.6 85.6 - - 78.1 69.7 59.8 (74.0)
(3) (3) (3) (3) (3) (3) (3) (2) (2) (3) (3) (3)
Mean 61.2 60.7 64.9 74.1 80.4 85.5 86.5 86.7 83.7 76.6 66.8 60.9 74.0
Readings at 8 a.m. and 6 p.m.
Source - U3BF
153
o
Monthly and >innual Mean Surface Water Temperatures, F
o o
BfUZOS SANTIAGO LIGHT STATION, PORT ISABEL, TEXAS 26 O^.i^'R* 97-10'W.
Year Jan. Feb. Mar. ■^pr. May June July Aug. Sept. Oct. Nov. Dec. Ann.
1930 47.2 54.4 54.7 54.9 62.0 65.2 65.8 63.7 65.2 61.3 51.9 43-8 57.5
1931 45.3 48.0 46.6 50.8 59.0 62.6 67.0 68.1 67.8 63.2 59.1 50.0 57.3
32 50.4 55.0 47.6 57.4 63.1 66.4 67.4 67.0 65.6 62.8 54.8 42.4 58.3
33 49.9 59.5 53-6 57.5 64.0 66.7 67.0 66.5 67.5 66.0 59.0 57.4 61.2
34 48.5 51.6 51.0 58.6 63.5 67.4 68.0 69.1 78.0 78.4 74.8 65.6 64.5
(5) (5) (5) (5) (5) (5) (5) (5) (5) (5) (5) (5)
Mean 48.3 53.7 50.7 55.8 62.3 65.7 67.0 66.9 68.8 66.3 59.9 51.8 59.8
On southern tip of Padres Island - the Port Isabel-Brovmsville ship channel passes
east to west about 5100 feet south of the station.
Readings at 8 a.m. and 6 p.m.
Source - DSBF
INT -DUP. SEC. »ASH.. DC 16(13
MBL W!^°'„,V Mi?li<,iiii|r|:ir' *
5 WHSE 01148
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