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 Oxwich Bay live page for full conditions.
Frequently asked questions
What is the average sea temperature at Oxwich Bay in May?
Oxwich Bay averages 11.0°C in May, based on long-run climatology for the Bristol Channel.
Is the sea warm enough to swim at Oxwich Bay in May?
Not without thermal protection — a wetsuit is recommended at 11.0°C.
Do I need a wetsuit at Oxwich Bay in May?
A 4/3 mm full wetsuit, boots and neoprene cap are recommended.
