Yes. Siesta Key averages 27.0°C in May — 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 Siesta Key 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 Siesta Key in May?
Siesta Key averages 27.0°C in May, based on long-run climatology for the Gulf of Mexico.
Is the sea warm enough to swim at Siesta Key in May?
Yes, most swimmers find 27.0°C comfortable for unrestricted swimming.
