Cold. 5.0°C in April 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 Marielyst live page for full conditions.
Frequently asked questions
What is the average sea temperature at Marielyst in April?
Marielyst averages 5.0°C in April, based on long-run climatology for the Baltic Sea.
Is the sea warm enough to swim at Marielyst in April?
Not without thermal protection — a wetsuit is recommended at 5.0°C.
Do I need a wetsuit at Marielyst in April?
A 4/3 mm full wetsuit, boots and neoprene cap are recommended.
