Best time to swim in Ketchikan in Alaska Sea temperature by month

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

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

Do you feel like swimming in Ketchikan in Alaska? Discover the average sea temperature for each month of the year (based on previous years' data) and our opinion on swimming in the table below. For more information on the sea temperature of a specific month, click on the month's name in the table.

Month Sea temperature
January 44°F (min: 41°F/max: 46°F)
February 43°F (min: 42°F/max: 44°F)
March 43°F (min: 41°F/max: 45°F)
April 45°F (min: 41°F/max: 48°F)
May 49°F (min: 44°F/max: 53°F)
June 54°F (min: 48°F/max: 59°F)
July 56°F (min: 52°F/max: 59°F)
August 57°F (min: 53°F/max: 60°F)
September 54°F (min: 51°F/max: 57°F)
October 51°F (min: 49°F/max: 52°F)
November 48°F (min: 46°F/max: 50°F)
December 46°F (min: 45°F/max: 48°F)

Water temperature variation in Ketchikan throughout the year

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