Water Temperature Table of All Coastal Regions

IMPORANT NOTICES:

— The table below shows the averages of water temperatures in degrees Fahrenheit (°F).
— To convert temperature units, enter a number in either box below, then click the other box.
Temperature Conversion:  Degrees Fahrenheit (°F) = Degrees Celsius (°C)

Atlantic Coast: North

Location JAN FEB MAR APR
1-15
APR
16-30
MAY
1-15
MAY
16-31
JUN
1-15
JUN
16-30
JUL
1-15
JUL
16-31
AUG
1-15
AUG
16-31
SEP
1-15
SEP
16-30
OCT
1-15
OCT
16-31
NOV DEC
Bar Harbor
ME
38 36 38 42 45 47 51 54 56 58 60 63 60 58 57 55 53 52 44
Eastport ME 40 37 38 39 41 43 44 46 46 50 51 51 51 52 51 50 49 45 45
Portland
ME
34 33 37 39 41 47 51 54 57 60 61 62 61 59 58 54 50 47 39
Portsmouth
Harbor NH
40 35 37 41 45 48 52 54 56 60 60 63 60 60 57 53 51 48 41
Boston, MA 40 36 41 45 49 54 58 61 63 66 67 68 68 66 63 58 56 51 42
Fall River
MA
37 36 41 47 51 55 60 65 63 71 74 75 75 71 68 59 54 52 44
Woods
Hole MA
34 35 37 44 47 54 56 61 65 70 72 72 71 69 66 62 56 50 41
Conimicut
Light RI
38 37 41 46 51 56 60 65 69 73 75 76 75 72 70 65 59 52 43
Quonset
Point RI
38 37 40 45 49 51 53 63 66 75 78 72 71 69 61 62 57 51 43
Newport
RI
37 36 37 44 48 52 57 61 63 68 69 71 69 67 66 61 59 52 44
Providence
RI
39 37 41 46 51 55 59 61 66 69 70 71 70 69 66 62 58 50 43
New Haven
CT
42 36 40 46 50 55 60 66 69 72 73 75 75 74 71 66 60 53 47
New London
CT
37 37 40 47 51 54 59 62 66 68 72 72 71 70 67 62 57 52 42

Atlantic Coast: Central

Location JAN FEB MAR APR
1-15
APR
16-30
MAY
1-15
MAY
16-31
JUN
1-15
JUN
16-30
JUL
1-15
JUL
16-31
AUG
1-15
AUG
16-31
SEP
1-15
SEP
16-30
OCT
1-15
OCT
16-31
NOV DEC
Bergen
Point NY
26 26 32 47 51 56 60 65 70 73 74 76 75 73 70 65 59 52 39
Kings
Point NY
37 36 40 46 49 55 59 63 67 68 71 73 74 72 70 66 60 54 43
Montauk, NY 36 35 38 42 46 50 54 59 62 67 70 70 70 69 66 62 57 56 43
The Battery
NY
38 36 41 45 49 54 60 64 67 70 73 74 73 72 68 63 58 53 43
Willets
Point NY
35 34 39 45 49 54 59 63 66 70 71 73 73 72 69 64 59 54 42
Sandy
Hook NJ
37 36 40 44 48 52 58 60 63 67 71 72 72 70 66 61 57 51 43
Atlantic
City NJ
37 35 42 46 50 54 58 62 64 69 70 72 73 72 67 63 58 53 44
Cape May
NJ
37 37 42 48 51 56 62 67 69 71 74 74 73 73 70 63 58 52 42
Ship John Shoal
NJ
37 37 44 52 57 61 68 74 77 81 82 82 79 76 72 60 56 52 44
Tacony-Palmyra Bridge
NJ
36 37 45 53 57 61 66 74 77 79 82 80 78 74 70 63 58 49 41
Marcus Hook PA 38 38 44 51 56 63 66 73 75 79 82 82 80 75 72 68 61 52 43
Newbold PA 37 37 44 50 55 61 64 72 75 80 82 81 78 74 71 63 56 48 40
Philadelphia PA 37 37 43 50 55 61 65 71 74 78 80 80 78 75 72 66 60 51 42
Brandywine
Shoal Light DE
38 38 45 52 56 63 67 73 77 81 83 83 80 76 73 67 61 52 43
Delaware
City DE
38 38 45 52 56 63 67 73 77 81 83 83 80 76 73 67 61 52 43
Lewes
DE
37 36 41 49 53 58 62 66 69 71 74 76 75 73 70 65 58 52 44
Reedy Point
DE
37 37 44 52 56 62 66 74 78 80 82 81 80 77 73 67 61 52 43
Annapolis
MD
36 35 42 50 54 58 63 69 74 76 78 78 77 75 71 66 60 53 45
Baltimore
MD
40 37 43 51 57 61 67 70 75 77 78 79 79 77 72 66 61 54 43
Chesapeake
City MD
36 36 44 52 58 64 69 75 79 81 83 83 81 77 73 67 60 52 41
Ocean
City MD
37 34 42 48 51 53 58 60 65 68 69 71 71 71 69 65 59 53 44
Solomons
Island MD
37 37 43 50 55 61 66 72 75 79 81 82 84 79 73 66 61 57 45
Tolchester
Beach MD
37 36 44 51 57 62 67 72 76 79 81 80 79 76 71 66 59 51 41
Washington
DC
37 37 46 54 61 64 71 74 79 80 83 83 81 78 72 64 58 52 41

Atlantic Coast: South

Location JAN FEB MAR APR
1-15
APR
16-30
MAY
1-15
MAY
16-31
JUN
1-15
JUN
16-30
JUL
1-15
JUL
16-31
AUG
1-15
AUG
16-31
SEP
1-15
SEP
16-30
OCT
1-15
OCT
16-31
NOV DEC
Chesapeake
Bay Bridge
Tunnel VA
46 42 44 56 57 62 66 71 74 77 78 79 78 78 75 66 62 56 49
Kiptopeke VA 36 39 46 51 56 60 66 70 69 76 77 78 77 76 74 66 61 54 44
Lewisetta, VA 39 40 48 56 61 66 71 77 80 81 83 83 81 78 73 65 60 53 44
Money Point, VA 49 49 55 61 65 71 74 80 83 86 87 87 85 82 78 68 64 60 54
Virginia
Beach
VA
55 53 48 50 53 58 60 70 73 76 78 80 81 75 72 70 67 60 60
Yorktown, VA 42 42 49 56 59 67 71 75 78 81 82 83 82 79 76 72 65 56 47
Cape
Hatteras
NC
49 46 52 58 60 68 68 72 75 76 79 80 80 78 75 72 68 58 55
Duck
NC
45 44 46 58 60 66 68 73 74 71 71 73 75 76 74 71 66 59 52
Wilmington
NC
58 58 62 69 72 75 78 80 81 82 83 82 83 83 82 79 75 69 62
Myrtle
Beach,
SC
48 50 55 62 66 70 75 77 80 81 83 83 82 81 79 72 67 61 53
Charleston
SC
50 50 57 64 68 71 75 79 80 82 84 84 83 82 79 73 68 63 54
Daytona
Beach
FL
61 59 65 70 73 75 78 79 80 80 80 80 81 83 82 79 76 71 65
Savannah
Beach
GA
51 52 59 65 69 72 76 79 82 84 86 85 84 83 80 75 70 64 54
Fernandina
Beach FL
55 55 62 68 72 75 78 81 81 83 84 84 84 83 81 76 72 66 58
Mayport(Bar
Pilots Dock),FL
58 58 62 69 72 75 78 80 81 82 83 82 83 83 82 79 75 69 62
St Augustine
Beach FL
57 56 61 68 71 74 77 80 81 83 84 83 83 83 82 78 72 67 60
Miami
Beach
FL
71 73 75 78 78 80 81 84 85 86 86 86 84 84 83 83 79 76 73
Stuart
Beach
FL
67 66 70 71 74 75 78 79 79 79 79 80 80 81 80 79 77 75 70
Virginia
Key, FL
71 72 74 77 78 81 83 85 85 86 87 87 86 85 85 83 81 76 73

Other Atlantic Sites

Location JAN FEB MAR APR
1-15
APR
16-30
MAY
1-15
MAY
16-31
JUN
1-15
JUN
16-30
JUL
1-15
JUL
16-31
AUG
1-15
AUG
16-31
SEP
1-15
SEP
16-30
OCT
1-15
OCT
16-31
NOV DEC
San Juan P.R. 77 78 78 79 80 80 81 81 82 81 81 83 83 83 83 83 82 81 80
Bermuda 64 63 64 66 67 72 76 78 79 82 84 83 82 80 79 77 74 70 65

Gulf of Mexico Coast: Eastern

Location JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC
Blackwater Sound, FL 65 72 71 78 83 87 88 88 86 82 76 73
Little Blackwater, FL 62 70 70 76 82 86 87 88 87 81 75 71
Long Sound, FL 64 72 71 78 83 86 88 88 86 81 76 73
Highway Creek, FL 63 71 71 77 84 87 87 88 85 80 78 71
Duck Key, FL 62 70 69 76 82 86 87 87 85 80 75 71
Trout Cove, FL 63 71 70 77 83 86 88 88 87 81 76 71
Butternut Key, FL 63 69 69 76 82 86 87 87 85 80 75 71
Little Madeira, FL 63 71 71 77 83 86 88 88 86 81 76 72
Taylor River, FL 63 71 72 78 84 86 88 88 85 80 74 70
Bob Allen, FL 62 71 70 78 84 87 89 88 86 80 76 72
Whipray Basin, FL 62 69 71 77 84 87 88 87 85 79 74 69
Garfield Bight, FL 65 69 70 77 85 87 89 88 87 81 74 72
Peterson Key, FL 62 70 70 77 83 86 88 88 86 80 75 72
Little Rabbit Key, FL 62 69 68 77 83 87 88 88 86 79 75 70
Johnson Key, FL 63 70 70 76 83 86 88 88 86 81 75 70
Murray Key, FL 63 69 70 77 84 87 88 88 86 81 74 71
Tarpon Bay East, FL 63 71 71 78 83 86 87 86 84 79 75 70
Cane Patch, FL 64 70 72 78 81 84 85 85 84 79 73 67
Gunboat Island, FL 63 70 71 76 82 85 86 86 85 78 73 70
Broad River Lower, FL 63 70 70 76 82 85 87 86 86 79 74 71
Lostmans River, FL 62 70 70 76 83 85 88 87 86 80 75 71
Willy Willy, FL 61 69 70 76 83 86 86 86 84 78 71 69
Cannon Bay, FL 63 71 71 78 85 90 89 89 87 81 77 72
Watson Place, FL 62 70 70 76 83 86 88 87 86 80 75 71
Broad River, FL 62 70 71 77 82 85 87 86 84 79 74 70
Key West FL 69 70 75 78 82 85 87 87 86 82 76 72
Naples FL 66 66 71 77 82 86 87 87 86 81 73 68
St. Petersburg
FL
62 64 68 74 80 84 86 86 84 78 70 64
Cedar Key FL 58 60 66 73 80 84 86 86 83 76 66 60
Pensacola FL 56 58 63 71 78 84 85 86 82 74 65 58
Dauphin
Island AL
51 53 60 70 75 82 84 84 80 72 62 56
Coast Guard
Sector Mobile AL
56 58 64 72 79 86 87 86 84 77 67 60
Mobile State
Docks AL
51 52 58 69 77 84 86 86 82 71 64 56
Grand Isle LA 61 61 64 70 77 83 85 85 83 77 70 65
Eugene Island LA 51 53 60 68 76 83 85 85 82 74 63 55

Gulf of Mexico Coast: Western

Location JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC
Corpus Christi Point, TX 59 60 65 72 79 83 84 85 84 79 70 62
Eagle Point, TX 55 58 65 71 74 86 87 88 82 73 65 56
Freeport TX 53 56 62 71 77 82 84 85 82 75 66 59
Galveston Pleasure
Pier, TX
54 55 61 71 78 83 86 86 83 75 67 59
Galveston Bay Entrance,
North Jetty, TX
56 58 64 72 78 84 85 87 83 77 68 59
Galveston Channel TX
Morgans Point, TX 54 58 65 72 78 85 86 87 82 72 66 57
Port Aransas, TX 59 61 67 71 80 85 86 86 86 77 72 63
Port Mansfield, TX 58 61 66 75 79 83 85 85 83 76 69 62
Rockport, TX 59 63 68 75 81 87 88 89 85 79 70 61
Sabine Pass
North TX
39 46 50 56 58 66 69 71 69 61 32 41
South Padre Island TX 58 60 64 70 77 79 79 80 83 78 71 64
Buoy 42001 73 71 70 74 78 82 84 85 84 81 77 75
Buoy 42002 71 69 70 73 77 82 85 86 84 82 78 74
Buoy 42003 75 76 77 78 80 83 85 85 84 82 81 79

Pacific Coast: North

Location JAN FEB MAR APR
1-15
APR
16-30
MAY
1-15
MAY
16-31
JUN
1-15
JUN
16-30
JUL
1-15
JUL
16-31
AUG
1-15
AUG
16-31
SEP
1-15
SEP
16-30
OCT
1-15
OCT
16-31
NOV DEC
Port
Orford
OR
50 50 50 50 50 50 51 51 51 51 51 51 53 53 53 52 52 52 51
Charleston
OR
50 50 51 51 52 52 53 54 55 55 55 55 55 55 55 53 53 53 50
Newport
OR
49 50 50 50 50 51 53 55 55 55 55 55 55 55 56 54 53 53 52
Seaside
OR
49 49 50 51 51 53 55 57 58 58 58 58 58 58 57 55 54 53 51
Columbia
River
Lightship
OR
47 48 49 50 51 52 54 55 56 57 57 58 58 57 57 56 55 53 50
Astoria
OR
42 42 46 48 52 56 58 60 62 64 67 68 67 67 64 61 57 52 45
Umatilla
Lightship
WA
48 47 47 48 49 50 51 53 54 54 55 55 55 56 56 54 53 52 50
Longview WA 42 42 44 47 50 52 56 58 61 65 68 70 70 68 66 62 58 51 44
Neah
Bay
WA
45 46 47 48 49 50 51 52 53 53 53 53 53 53 52 52 51 49 47
Port
Townsend
WA
44 44 46 47 48 49 50 51 52 53 54 54 54 54 53 52 51 50 46
Seattle
WA
47 46 46 48 49 50 51 53 54 55 56 56 56 56 55 54 53 51 49
Tacoma WA 47 46 46 47 48 49 49 51 52 53 54 55 55 55 55 54 53 52 49
Cherry Point
WA
46 46 46 48 49 50 52 53 54 55 56 56 56 55 54 52 50 49 47
Friday
Harbor
WA
43 42 44 44 45 47 47 52 52 52 53 53 53 53 53 52 51 49 47

Pacific Coast: Central

Location JAN FEB MAR APR
1-15
APR
16-30
MAY
1-15
MAY
16-31
JUN
1-15
JUN
16-30
JUL
1-15
JUL
16-31
AUG
1-15
AUG
16-31
SEP
1-15
SEP
16-30
OCT
1-15
OCT
16-31
NOV DEC
Avila Beach CA 55 56 55 54 54 55 55 56 57 58 60 60 60 60 60 59 59 57 55
Morro Bay CA 54 54 54 53 54 54 55 56 57 57 58 58 58 58 58 57 57 56 55
Point Lobos CA (south) 53 53 52 52 51 51 51 52 53 53 54 54 55 55 56 55 55 55 53
Monterey CA 54 54 55 55 55 56 56 56 56 57 58 59 58 59 59 58 57 56 55
Redwood City
CA
51 53 57 59 61 64 65 67 70 71 72 72 71 71 69 66 65 59 53
Richmond CA 52 53 55 56 57 59 61 61 63 64 66 65 65 65 64 63 61 57 53
Pacific Grove CA 53 54 54 54 55 55 55 56 57 57 57 57 57 58 58 57 56 55 55
Santa Cruz CA 53 54 54 54 54 55 55 56 57 58 59 59 60 60 59 59 59 56 54
Alameda CA 51 54 56 57 60 62 63 64 65 66 66 66 66 66 65 64 61 58 53
Fort Point CA 53 53 54 54 55 55 55 56 58 58 58 59 60 60 60 59 58 56 55
Southeast Farallon Island CA 53 53 53 52 52 52 52 53 53 54 54 55 55 56 57 57 56 55 54
Bodega Bay CA 52 52 52 51 50 50 50 51 51 51 53 53 54 54 55 55 54 54 53
Fort Ross CA 52 52 51 50 49 49 49 50 50 51 52 52 53 53 54 54 54 54 53
Mendocino CA 52 52 50 50 50 50 50 51 51 51 51 52 52 53 53 54 53 53 53
Blunts Reef Lightship CA 52 52 51 50 50 50 50 51 51 51 51 51 51 52 52 53 53 53 53
Trinidad CA 51 51 52 50 51 50 50 51 51 53 53 53 55 55 54 54 54 53 51
Crescent City CA 50 51 51 51 52 53 54 54 56 57 58 59 59 58 56 54 54 53 51
San Francisco
CA
52 53 54 54 55 55 56 57 57 58 60 61 61 61 60 60 58 57 53

Pacific Coast: South

Location JAN FEB MAR APR
1-15
APR
16-30
MAY
1-15
MAY
16-31
JUN
1-15
JUN
16-30
JUL
1-15
JUL
16-31
AUG
1-15
AUG
16-31
SEP
1-15
SEP
16-30
OCT
1-15
OCT
16-31
NOV DEC
Anacapa Island
CA
56 56 56 56 57 58 59 60 61 63 64 65 65 65 64 64 63 61 59
Avalon
CA
58 57 58 58 59 60 62 62 64 66 67 69 70 69 68 68 66 63 60
Balboa
CA
57 57 58 59 59 60 62 63 64 65 66 67 67 65 65 65 63 61 59
Dana Point
CA
57 57 59 60 62 62 63 65 67 67 68 68 68 67 66 65 64 61 58
Gaviota
CA
57 57 56 56 57 57 58 58 60 62 63 64 64 64 63 62 62 61 58
Los Angeles
CA
58 58 60 60 60 61 61 62 64 65 67 68 68 67 66 66 66 64 60
Newport Beach
CA
58 60 60 60 61 63 64 66 66 69 69 70 69 69 68 68 65 64 61
Oceanside
CA
57 57 58 59 60 61 62 63 65 66 67 69 69 67 66 65 63 61 59
Oceanside Offshore
CA
58 58 58 59 59 64 64 64 64 69 69 69 69 68 68 66 66 63 61
Point Mugu
CA
57 57 56 55 54 55 56 58 58 59 60 62 61 61 62 62 60 60 59
Port Hueneme
CA
56 56 56 56 56 57 57 58 60 60 62 62 62 62 62 62 61 60 58
San Clemente
CA
57 57 58 58 59 60 61 63 63 64 66 68 67 66 66 65 63 61 58
San Diego
Bay CA
59 60 62 63 64 66 67 69 70 71 71 71 72 72 70 69 68 65 60
San Nicolas Island
CA
58 57 56 55 55 57 57 58 58 61 61 62 62 62 62 64 64 62 60
Santa Monica
CA
57 57 58 58 59 60 61 63 65 66 67 68 68 67 66 65 63 61 59
Santa Barbara
CA
56 57 57 58 58 59 60 61 62 63 63 64 65 64 64 64 62 60 57
Scripps Pier
CA
58 57 58 59 60 61 63 64 65 66 67 68 68 66 66 65 63 61 59
Ventura
CA
55 57 58 59 59 60 61 62 64 64 65 67 67 66 65 65 62 60 56
Zuma Beach
CA
57 57 57 57 57 57 58 59 60 61 63 66 66 65 64 64 62 61 58

Other Pacific Islands

Location JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC
Pago Pago Am.
Samoa
84 84 84 84 83 82 81 81 81 82 83 83
Kwajalein
Marshall Islands
85 84 84 86 87 91 95 98 91 87 87 85
Wake Island 78 77 78 80 80 83 83 83 82 81 80 78

Great Lakes

Location JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC
Buffalo, NY 34.31 28.35 33.14 46.09 55.75 64.67 72.23 70.20 60.63 49.95 44.05 37.65
Cleveland, OH 38.67 38.81 41.85 48.90 55.59 68.83 74.97 74.54 70.03 58.22 50.11 44.12
Marblehead, OH 34.24 33.83 37.23 49.27 59.50 72.26 75.19 77.00 68.21 55.37 45.18 39.01
Toledo, OH 53.90 51.01 50.41 50.34 52.20 52.58 53.88 55.72 57.84 58.97 57.90 55.92
Harbor Beach, MI 33.98 34.60 37.63 45.68 53.03 59.66 70.52 71.20 67.78 56.16 44.65 35.58
Alpena, MI
S.W.Pier, MI 34.00 34.55 35.17 34.74 43.73 53.31 63.96 67.86 64.19 56.64 47.62 37.98
West Neebish
Island, MI
40.82 42.35 41.27 39.92 46.90 54.18 62.18 65.60 63.50 56.39 48.02 42.94
De Tour Village, MI 27.94 27.44 31.02 39.14 48.36 59.98 64.91 63.64 60.31 47.03 38.05 30.25
Ludington, MI 45.91 44.79 42.98 48.17 52.10 56.65 59.27 61.35 60.48 56.44 53.04 49.52
Port Inland, MI 40.82 42.35 41.27 39.92 46.90 54.18 62.18 65.60 63.50 56.39 48.02 42.94
Oswego, NY 49.45 48.10 47.53 48.91 52.10 56.94 61.94 64.74 64.38 62.42 57.60 53.67
Point Iroquois, MI 41.51 42.80 42.27 44.76 46.96 52.96 56.22 56.37 53.98 47.51 43.51 41.10
Marquette C.G., MI 44.76 42.76 45.37 46.10 48.23 53.27 55.07 55.62 54.30 48.89 45.10 41.64
Rock Cut, MI 37.58 37.70 38.12 39.52 47.88 55.92 66.00 68.32 64.22 52.85 44.44 38.62

Alaska Coast

Location JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC
Adak Island
AK
40 40 39 40 41 43 45 46 46 45 44 41
Anchorage
AK
31 31 32 34 44 54 58 57 53 44 34 32
Juneau
AK
36 36 37 40 46 51 52 51 49 44 40 38
Ketchikan
AK
43 43 43 44 48 54 56 57 54 50 46 44
Kodiak
AK
38 37 36 37 41 44 52 53 51 48 44 41
Nikiski
AK
27 26 27 32 41 46 54 53 49 42 33 30
Nome
AK
26 27 18 31 34 43 52 54 48 38 30 28
Sand Point
AK
38 37 36 37 40 45 50 53 52 49 45 41
Seldovia
AK
28 39 39 40 43 46 49 51 51 48 44 41
Seward
AK
41 39 39 40 44 50 54 56 54 50 46 43
Sitka
AK
43 42 42 43 47 51 54 56 56 51 47 45
Yakutat
AK
41 40 40 42 47 51 47 56 54 46 48 43
Unalaska
AK
38 38 38 39 42 45 48 50 48 45 42 40
Valdez
AK
41 40 43 41 47 49 52 53 52 49 45 42

Hawaiian Island Coast

Location JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC
Honolulu
Oahu Island
76 76 76 76 78 79 80 80 81 81 79 77
Hilo
Hawaii Island
72 72 71 72 72 74 74 75 75 75 74 73
Kahului
Maui Island
76 75 75 76 78 79 79 80 80 80 78 77
Kawaihae
Hawaii Island
78 77 77 78 79 80 81 81 80 81 80 78
Mokuoloe, Oahu Island 73 74 74 75 77 79 79 80 80 78 76 74
Nawilinii
Kauai Island
77 77 77 78 79 81 82 82 83 82 80 78