December is a popular month to ask about Cha-am 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 Thailand.
Cha-am Beach sea temperature in December — averages 27.0°C
The sea at Cha-am Beach in Thailand averages 27.0°C during December, based on long-run climatology for the Gulf of Thailand. 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
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 · Cha-am Beach
Can you swim at Cha-am Beach in July? — 29.0°C water29.0°CCan you swim at Cha-am Beach in August? — 29.0°C water29.0°CCan you swim at Cha-am Beach in September? — 29.0°C water29.0°CCan you swim at Cha-am Beach in October? — 29.0°C water29.0°CCan you swim at Cha-am Beach in November? — 28.0°C water28.0°CCan you swim at Cha-am Beach in December? — 27.0°C water27.0°C
Frequently asked questions
What is the average sea temperature at Cha-am Beach in December?
Cha-am Beach averages 27.0°C in December, based on long-run climatology for the Gulf of Thailand.
Is the sea warm enough to swim at Cha-am Beach in December?
Yes, most swimmers find 27.0°C comfortable for unrestricted swimming.
Do I need a wetsuit at Cha-am Beach in December?
No wetsuit needed.