December is a popular month to ask about Long Beach Ko Lanta 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 Andaman Sea.
Long Beach Ko Lanta sea temperature in December — averages 27,0°C
The sea at Long Beach Ko Lanta in Thailand averages 27,0°C during December, based on long-run climatology for the Andaman Sea. 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 · Long Beach Ko Lanta
Can you swim at Long Beach Ko Lanta in July? — 29,0°C water29,0°CCan you swim at Long Beach Ko Lanta in August? — 29,0°C water29,0°CCan you swim at Long Beach Ko Lanta in September? — 29,0°C water29,0°CCan you swim at Long Beach Ko Lanta in October? — 29,0°C water29,0°CCan you swim at Long Beach Ko Lanta in November? — 28,0°C water28,0°CCan you swim at Long Beach Ko Lanta in December? — 27,0°C water27,0°C
Frequently asked questions
What is the average sea temperature at Long Beach Ko Lanta in December?
Long Beach Ko Lanta averages 27,0°C in December, based on long-run climatology for the Andaman Sea.
Is the sea warm enough to swim at Long Beach Ko Lanta in December?
Yes, most swimmers find 27,0°C comfortable for unrestricted swimming.
Do I need a wetsuit at Long Beach Ko Lanta in December?
No wetsuit needed.