Ocean Temperatures at Florida Beaches in Fall

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The tables below give the monthly averages for ocean temperatures at Florida beaches in degrees Fahrenheit and degrees Celsius for September, October and November. The list of beaches runs from south to north along the Atlantic Ocean and the Gulf of Mexico.

Water cools slowly and steadily throughout fall along Florida's coasts. But in southern Florida — from St. Petersburg on the Gulf of Mexico and Daytona Beach on the Atlantic Ocean to the Florida Keys — the water normally stays above 70 °F (21 °C) right into November.

The Gulf coast starts off warmer in September than the Atlantic side, but the Gulf of Mexico cools more rapidly. So by October, Gulf temperatures match those in the Atlantic.

On both coasts, the water cools faster the farther north you go. In November, the water off southern Florida can be 10 °F (6 °C) warmer than at the state's northern beaches.


Florida's average ocean temperature in °F
Sep Oct Nov
Atlantic Ocean  
Miami Beach 84 81 76
Stuart Beach 81 78 75
Daytona Beach 83 78 71
St Augustine Beach 83 75 67
Fernandina Beach 82 74 66
Gulf of Mexico  
Key West 86 82 76
Naples 86 81 73
St. Petersburg 84 78 70
Cedar Key 83 76 66
Pensacola 82 74 65

Average water temperature at Florida beaches in °C
Sep Oct Nov
Atlantic Ocean  
Miami Beach 29 27 24
Stuart Beach 27 26 24
Daytona Beach 28 26 22
St Augustine Beach 28 24 19
Fernandina Beach 28 23 19
Gulf of Mexico  
Key West 30 28 24
Naples 30 27 23
St. Petersburg 29 26 21
Cedar Key 28 24 19
Pensacola 28 23 18
Reference

National Oceanographic Data Center. NODC Coastal Water Temperature Guide (CWTG).

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