Storm-smart Monday with an 88.5°F Gulf average.

Siesta Key weather and Gulf conditions

Recorded National Weather Service KSRQ observations ranged from 79°F to 91°F, including rain, heavy rain, thunderstorms and thunderstorms with rain. NOAA/NDBC station 42013 measured Gulf water from 88.2°F to 90.0°F, averaging 88.5°F across 48 half-hour readings. Check the National Weather Service Tampa Bay surf-zone forecast, posted beach flags and lifeguard guidance before swimming.

High: 91°F · Low: 79°F · Gulf water: 88.5°F

Recorded air temperature and conditions are from the September 14 National Weather Service KSRQ observations. Gulf water is the September 14 average from 48 NOAA/NDBC station 42013 readings; beach hazards are from the National Weather Service Tampa Bay surf-zone forecast.

Use the early window and let thunder set the schedule.

Start with a flexible morning beach window, carry water and plan a shaded or air-conditioned stop during the hottest stretch. At the first sound of thunder, leave the water and beach immediately and wait for official guidance before returning.

Keep the island loop easy when skies change.

Siesta Free Ride can connect the beach, Village, restaurants and your hotel without another parking search, so your group can pivot easily when a shower moves through.