Sunny Monday with an 87.7°F Gulf average.

Siesta Key weather and Gulf conditions

Recorded National Weather Service KSRQ observations reached 88°F and fell to 73°F. NOAA/NDBC station 42013 measured Gulf water from 87.4°F to 88.7°F, averaging 87.7°F across 44 available readings. Check the National Weather Service Tampa Bay surf-zone forecast, posted beach flags and lifeguard guidance before swimming.

Recorded high: 88°F · Recorded low: 73°F · Average Gulf water: 87.7°F

Recorded air temperature and conditions are from the September 21 National Weather Service KSRQ observations. Gulf water is the September 21 average from 44 NOAA/NDBC station 42013 readings; beach hazards are from the National Weather Service Tampa Bay surf-zone forecast.

Use the sunny early window and stay thunder-aware.

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.