Florida's Ocean Temperatures in Summer

The tables below give the monthly averages for ocean temperatures at Florida beaches in degrees Fahrenheit and degrees Celsius for June, July and August.

The list of beaches runs from south to north along the Atlantic Ocean and the Gulf of Mexico.

Just about anywhere in Florida, the ocean usually stays above 80 °F (27 °C) throughout summer. All along the entire Florida Gulf Coast the water's consistently warm, with temperatures varying by only one or two degrees from beach to beach.

Water at the warmest beaches — Key West and Naples — averages 87 °F (31 °C) when the temperature peaks in July and August. That's the hottest ocean water to be found anywhere at any time in the United States.

Typically during summer the Atlantic Ocean off Florida stays a few degrees cooler than the Gulf of Mexico.