December is a popular month to ask about Sunset Beach Chatan because conditions can shift week to week along this coast. Expect the water near 19,0°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 East China Sea.
Sunset Beach Chatan sea temperature in December — averages 19,0°C
The sea at Sunset Beach Chatan in Japan averages 19,0°C during December, based on long-run climatology for the East China 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
19,0°C
mild · Good
Live water now
…
Recommended wetsuit
Shorty 2mm
At 19.0°C a 2mm shorty keeps surfers warm; lap swimmers can usually skip the neoprene.
Monthly comparison
Yes, but expect a fresh dip · Sunset Beach Chatan
Can you swim at Sunset Beach Chatan in July? — 28,0°C water28,0°CCan you swim at Sunset Beach Chatan in August? — 28,0°C water28,0°CCan you swim at Sunset Beach Chatan in September? — 27,0°C water27,0°CCan you swim at Sunset Beach Chatan in October? — 24,0°C water24,0°CCan you swim at Sunset Beach Chatan in November? — 21,0°C water21,0°CCan you swim at Sunset Beach Chatan in December? — 19,0°C water19,0°C
Frequently asked questions
What is the average sea temperature at Sunset Beach Chatan in December?
Sunset Beach Chatan averages 19,0°C in December, based on long-run climatology for the East China Sea.
Is the sea warm enough to swim at Sunset Beach Chatan in December?
It is swimmable but fresh; confident swimmers will be fine without a wetsuit.
Do I need a wetsuit at Sunset Beach Chatan in December?
A 2 mm shorty is comfortable for sessions over 30 minutes.