Can you swim at Treasure Island Beach in September? — 29.0°C water
Yes — ideal swimming weather
Average sea · September
29.0°C
Live water now
…
Recommended wetsuit
No wetsuit
tropical
Yes. Treasure Island Beach averages 29.0°C in September — bath-warm by European standards and comfortable for all-day swimming, snorkelling and families.
Monthly averages set expectations, but the specific beach today depends on wind, swell and recent weather. Check the live value at the top of this page or open the Treasure Island Beach live page for full conditions.
Best months to swim
April · May · June · July · August · September · October · November
Frequently asked questions
What is the average sea temperature at Treasure Island Beach in September?
Treasure Island Beach averages 29.0°C in September, based on long-run climatology for the Gulf of Mexico.
Is the sea warm enough to swim at Treasure Island Beach in September?
Yes, most swimmers find 29.0°C comfortable for unrestricted swimming.
Do I need a wetsuit at Treasure Island Beach in September?
