Beach
Grayton Beach State Park
Florida, United States · sea 29.3 °C at its warmest, in August

Sea temperature month by month
Monthly means in °C, NOAA OISST v2.1 climatology 1991–2020.
About
Grayton Beach State Park is a Florida State Park located between Panama City Beach and Destin, near the unincorporated area of Grayton Beach, on CR 30A, in northwestern Florida.
Questions
How warm is the sea at Grayton Beach State Park?
The sea off Grayton Beach State Park averages 29.3 °C at its warmest, in August, and 17.1 °C at its coolest. These are monthly means from NOAA's OISST v2.1 satellite and buoy record for 1991 to 2020, sampled at the beach's own coordinates.
When can you swim at Grayton Beach State Park?
The sea reaches 20 °C or more from April to November. Twenty degrees is where most swimmers stop calling water cold; below it, a wetsuit helps.
Where is Grayton Beach State Park?
Grayton Beach State Park is on the coast of Florida, United States, at 30.3039, -86.0789. The map on this site flies straight to it.