Best time to swim in Snowdonia National Park in Wales Sea temperature by month

Do you want to swim in the sea in Snowdonia National Park in Wales? But when is the best time to go to be sure to have pleasant water for swimming in Snowdonia National Park and be able to swim without catching cold? This month, or a different one? The answer is on this page, with the sea water temperature by month in Snowdonia National Park, based on the average temperatures recorded in previous years.

Best time to swim in Snowdonia National Park: the water temperature by month

Do you feel like swimming in Snowdonia National Park in Wales? Discover the average sea temperature for each month of the year (based on previous years' records) and our opinion on swimming in the table below.

Month Sea temperature
January 48°F (min: 45°F/max: 50°F)
February 47°F (min: 44°F/max: 50°F)
March 47°F (min: 45°F/max: 48°F)
April 48°F (min: 46°F/max: 51°F)
May 52°F (min: 49°F/max: 54°F)
June 56°F (min: 53°F/max: 59°F)
July 59°F (min: 56°F/max: 62°F)
August 60°F (min: 59°F/max: 62°F)
September 60°F (min: 59°F/max: 62°F)
October 58°F (min: 56°F/max: 60°F)
November 55°F (min: 53°F/max: 58°F)
December 51°F (min: 48°F/max: 54°F)

Water temperature variation in Snowdonia National Park throughout the year

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