August is a popular month to ask about Rhossili Bay because conditions can shift week to week along this coast. Expect the water near 17.0°C, with daily variation from wind, tides and recent storms. We refresh the live value from Open-Meteo Marine every hour, so the headline above always reflects the current state of the Irish Sea.
Rhossili Bay sea temperature in August — averages 17.0°C
The sea at Rhossili Bay in United Kingdom averages 17.0°C during August, based on long-run climatology for the Irish Sea. Use the live reading below for today's actual water and the monthly grid to compare with the rest of the year.
Average sea · August
17.0°C
mild · Fair
Live water now
…
Recommended wetsuit
3/2mm fullsuit
At 17.0°C a 3/2mm fullsuit is the standard wetsuit for surfing and watersports.
Monthly comparison
Yes, but expect a fresh dip · Rhossili Bay
Can you swim at Rhossili Bay in June? — 14.0°C water14.0°CCan you swim at Rhossili Bay in July? — 16.0°C water16.0°CCan you swim at Rhossili Bay in August? — 17.0°C water17.0°CCan you swim at Rhossili Bay in September? — 16.0°C water16.0°CCan you swim at Rhossili Bay in October? — 14.0°C water14.0°CCan you swim at Rhossili Bay in November? — 12.0°C water12.0°C
Frequently asked questions
What is the average sea temperature at Rhossili Bay in August?
Rhossili Bay averages 17.0°C in August, based on long-run climatology for the Irish Sea.
Is the sea warm enough to swim at Rhossili Bay in August?
It is swimmable but fresh; confident swimmers will be fine without a wetsuit.
Do I need a wetsuit at Rhossili Bay in August?
A 2 mm shorty is comfortable for sessions over 30 minutes.