December is a popular month to ask about Bantham because conditions can shift week to week along this coast. Expect the water near 10.0°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 Celtic Sea.
Bantham sea temperature in December — averages 10.0°C
The sea at Bantham in United Kingdom averages 10.0°C during December, based on long-run climatology for the Celtic 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
10.0°C
cool · Poor
Live water now
…
Recommended wetsuit
5/4mm fullsuit + boots & gloves
At 10.0°C you need a 5/4mm fullsuit with boots, gloves and ideally a hood.
Monthly comparison
Cold — wetsuit recommended · Bantham
Can you swim at Bantham in June? — 14.0°C water14.0°CCan you swim at Bantham in July? — 16.0°C water16.0°CCan you swim at Bantham in August? — 17.0°C water17.0°CCan you swim at Bantham in September? — 16.0°C water16.0°CCan you swim at Bantham in October? — 14.0°C water14.0°CCan you swim at Bantham in November? — 12.0°C water12.0°C
Frequently asked questions
What is the average sea temperature at Bantham in December?
Bantham averages 10.0°C in December, based on long-run climatology for the Celtic Sea.
Is the sea warm enough to swim at Bantham in December?
Not without thermal protection — a wetsuit is recommended at 10.0°C.
Do I need a wetsuit at Bantham in December?
A 4/3 mm full wetsuit, boots and neoprene cap are recommended.