Best time to swim in Shannon in Ireland Sea temperature by month

Do you want to swim in the sea in Shannon in Ireland? But when is the best time to go to be sure to have pleasant water for swimming in Shannon 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 Shannon, based on the average temperatures recorded in previous years.

Best time to swim in Shannon: the water temperature by month

Do you feel like swimming in Shannon in Ireland? 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 50°F (min: 49°F/max: 52°F)
February 50°F (min: 48°F/max: 51°F)
March 49°F (min: 48°F/max: 50°F)
April 51°F (min: 48°F/max: 53°F)
May 53°F (min: 51°F/max: 55°F)
June 56°F (min: 52°F/max: 60°F)
July 59°F (min: 56°F/max: 63°F)
August 61°F (min: 58°F/max: 63°F)
September 60°F (min: 58°F/max: 62°F)
October 58°F (min: 55°F/max: 60°F)
November 55°F (min: 54°F/max: 57°F)
December 52°F (min: 51°F/max: 54°F)

Water temperature variation in Shannon throughout the year

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