December is a popular month to ask about Madeira Beach because conditions can shift week to week along this coast. Expect the water near 20.0°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.
Madeira Beach sea temperature in December — averages 20.0°C
The sea at Madeira Beach in United States averages 20.0°C during December, 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 · December
20.0°C
warm · Good
Live water now
…
Recommended wetsuit
Shorty 2mm
At 20.0°C a 2mm shorty keeps surfers warm; lap swimmers can usually skip the neoprene.
Monthly comparison
Yes — comfortable for most swimmers · Madeira Beach
Can you swim at Madeira Beach in June? — 29.0°C water29.0°CCan you swim at Madeira Beach in July? — 30.0°C water30.0°CCan you swim at Madeira Beach in August? — 30.0°C water30.0°CCan you swim at Madeira Beach in September? — 29.0°C water29.0°CCan you swim at Madeira Beach in October? — 27.0°C water27.0°CCan you swim at Madeira Beach in November? — 23.0°C water23.0°C
Frequently asked questions
What is the average sea temperature at Madeira Beach in December?
Madeira Beach averages 20.0°C in December, based on long-run climatology for the Gulf of Mexico.
Is the sea warm enough to swim at Madeira Beach in December?
Yes, most swimmers find 20.0°C comfortable for unrestricted swimming.
Do I need a wetsuit at Madeira Beach in December?
Most swimmers don't need a wetsuit; a rash vest helps for longer sessions.