Cold. 9.0°C in May 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 Sopot Beach live page for full conditions.
Frequently asked questions
What is the average sea temperature at Sopot Beach in May?
Sopot Beach averages 9.0°C in May, based on long-run climatology for the Baltic Sea.
Is the sea warm enough to swim at Sopot Beach in May?
Not without thermal protection — a wetsuit is recommended at 9.0°C.
Do I need a wetsuit at Sopot Beach in May?
A 4/3 mm full wetsuit, boots and neoprene cap are recommended.
