Average Coastal Water Temperatures for the Southeast

Location JAN FEB MAR APR APR MAY MAY JUN JUN JUL JUL AUG AUG SEP SEP OCT OCT NOV DEC
1-15 16-30 1-15 16-31 1-15 16-30 1-15 16-31 1-15 16-31 1-15 16-30 1-15 16-31
Dauphin Island AL(DPIA1) 51 53 60 70 70 75 75 82 82 84 84 84 84 80 80 72 72 62 56
Cedar Key FL(CDRF1) 58 60 66 73 73 80 80 84 84 86 86 86 86 83 83 76 76 66 60
Daytona Beach FL (41009) 61 59 65 70 73 75 78 79 80 80 80 80 81 83 82 79 76 71 65
Fernandina Beach FL 55 55 62 68 72 75 78 81 81 83 84 84 84 83 81 76 72 66 58
Jacksonville Beach FL 57 56 61 68 71 74 77 80 81 83 84 83 83 83 82 78 72 67 60
Key West FL 69 70 75 79 79 82 83 86 86 87 87 87 87 86 86 83 80 76 72
Key West FL(MLRF1) 69 70 75 78 78 82 82 85 85 87 87 87 87 86 86 82 82 76 72
Miami Beach FL 71 73 75 78 78 80 81 84 85 86 86 86 84 84 83 83 79 76 73
Naples FL 66 66 71 77 77 82 82 86 86 87 87 87 87 86 86 81 81 73 68
Pensacola FL 56 58 63 71 71 78 78 84 84 85 85 86 86 82 82 74 74 65 58
St. Petersburg FL 62 64 68 74 74 80 80 84 84 86 86 86 86 84 84 78 78 70 64
Stuart Beach FL 67 66 70 71 74 75 78 79 79 79 79 80 80 81 80 79 77 75 70
Savannah Beach GA 51 52 59 65 69 72 76 79 82 84 86 85 84 83 80 75 70 64 54
Cape Hatteras NC 49 46 52 58 60 68 68 72 75 76 79 80 80 78 75 72 68 58 55
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
Cape Charles VA 36 39 46 51 56 60 66 70 69 76 77 78 77 76 74 66 61 54 44
Washington DC 37 37 46 54 61 64 71 74 79 80 83 83 81 78 72 64 58 52 41
San Juan P.R. 77 78 78 79 80 80 81 81 82 81 81 83 83 83 83 83 82 81 80

Data provided by the National Oceanographic Data Center & Updated Data Tables