May is a popular month to ask about St. Pete Beach because conditions can shift week to week along this coast. Expect the water near 27.0°C, with daily variation from wind, tides and recent storms. We refresh the live value from Open-Meteo Marine every hour, so the headline above always reflects the current state of the Gulf of Mexico.
St. Pete Beach sea temperature in May — averages 27.0°C
The sea at St. Pete Beach in United States averages 27.0°C during May, based on long-run climatology for the Gulf of Mexico. Use the live reading below for today's actual water and the monthly grid to compare with the rest of the year.
Average sea · May
27.0°C
tropical · Excellent
Live water now
…
Recommended wetsuit
No wetsuit
At 27.0°C the water is warm enough to swim and surf in just a swimsuit or boardshorts.
Monthly comparison
Yes — ideal swimming weather · St. Pete Beach
Can you swim at St. Pete Beach in July? — 30.0°C water30.0°CCan you swim at St. Pete Beach in August? — 30.0°C water30.0°CCan you swim at St. Pete Beach in September? — 29.0°C water29.0°CCan you swim at St. Pete Beach in October? — 27.0°C water27.0°CCan you swim at St. Pete Beach in November? — 23.0°C water23.0°CCan you swim at St. Pete Beach in December? — 20.0°C water20.0°C
Frequently asked questions
What is the average sea temperature at St. Pete Beach in May?
St. Pete Beach averages 27.0°C in May, based on long-run climatology for the Gulf of Mexico.
Is the sea warm enough to swim at St. Pete Beach in May?
Yes, most swimmers find 27.0°C comfortable for unrestricted swimming.
Do I need a wetsuit at St. Pete Beach in May?
No wetsuit needed.