Can you swim at Portmarnock in October? — 14.0°C water
Cool — short dips or a shorty wetsuit
Average sea · October
14.0°C
Live water now
…
Recommended wetsuit
4/3mm fullsuit
cool
Cool. 14.0°C in October means short dips for most people. A 2 mm shorty or 3/2 mm wetsuit transforms the experience.
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 live page for full conditions.
Frequently asked questions
What is the average sea temperature at Portmarnock in October?
Portmarnock averages 14.0°C in October, based on long-run climatology for the Irish Sea.
Is the sea warm enough to swim at Portmarnock in October?
Not without thermal protection — a wetsuit is recommended at 14.0°C.
