Cold. 7.0°C in December is cold-water swimming territory — a 4/3 mm full wetsuit, neoprene cap and short, repeated sessions are the safe approach.
Monthly averages set expectations, but the specific beach today depends on wind, swell and recent weather. Check the live value at the top of this page or open the Mamaia live page for full conditions.
Best months to swim
July · August · September
Frequently asked questions
What is the average sea temperature at Mamaia in December?
Mamaia averages 7.0°C in December, based on long-run climatology for the Black Sea.
Is the sea warm enough to swim at Mamaia in December?
Not without thermal protection — a wetsuit is recommended at 7.0°C.
Do I need a wetsuit at Mamaia in December?
A 4/3 mm full wetsuit, boots and neoprene cap are recommended.
