Best time to swim in Sein island (Île-de-Sein) in Brittany Sea temperature by month

Do you want to swim in the sea in Sein island (Île-de-Sein) in Brittany? But when is the best time to go to be sure to have pleasant water for swimming in Sein island (Île-de-Sein) 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 Sein island (Île-de-Sein), based on the average temperatures recorded in previous years.

Best time to swim in Sein island (Île-de-Sein): the water temperature by month

Do you feel like swimming in Sein island (Île-de-Sein) in Brittany? 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 53°F (min: 50°F/max: 55°F)
February 52°F (min: 50°F/max: 53°F)
March 51°F (min: 50°F/max: 52°F)
April 53°F (min: 50°F/max: 56°F)
May 56°F (min: 54°F/max: 59°F)
June 59°F (min: 55°F/max: 62°F)
July 61°F (min: 58°F/max: 65°F)
August 63°F (min: 60°F/max: 65°F)
September 62°F (min: 59°F/max: 64°F)
October 59°F (min: 57°F/max: 62°F)
November 58°F (min: 56°F/max: 61°F)
December 56°F (min: 53°F/max: 58°F)

Water temperature variation in Sein island (Île-de-Sein) throughout the year

Change units