Best time to swim in Karatsu in Japan Sea temperature by month

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

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

Do you feel like swimming in Karatsu in Japan? 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 61°F (min: 58°F/max: 65°F)
February 59°F (min: 58°F/max: 61°F)
March 59°F (min: 57°F/max: 60°F)
April 61°F (min: 58°F/max: 64°F)
May 66°F (min: 61°F/max: 71°F)
June 72°F (min: 68°F/max: 77°F)
July 78°F (min: 74°F/max: 82°F)
August 82°F (min: 79°F/max: 85°F)
September 79°F (min: 76°F/max: 83°F)
October 76°F (min: 73°F/max: 78°F)
November 71°F (min: 68°F/max: 74°F)
December 65°F (min: 61°F/max: 70°F)

Water temperature variation in Karatsu throughout the year

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