Can you swim at Portmarnock Beach in May? — 11.0°C water
Cold — wetsuit recommended
Average sea · May
11.0°C
Live water now
…
Recommended wetsuit
5/4mm fullsuit + boots & gloves
cool
Cold. 11.0°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 Portmarnock Beach live page for full conditions.
Frequently asked questions
What is the average sea temperature at Portmarnock Beach in May?
Portmarnock Beach averages 11.0°C in May, based on long-run climatology for the Atlantic Ocean.
Is the sea warm enough to swim at Portmarnock Beach in May?
Not without thermal protection — a wetsuit is recommended at 11.0°C.
Do I need a wetsuit at Portmarnock Beach in May?
A 4/3 mm full wetsuit, boots and neoprene cap are recommended.
