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

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

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

Do you feel like swimming in Nagasaki in Japan? 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 63°F (min: 58°F/max: 66°F)
February 60°F (min: 58°F/max: 62°F)
March 60°F (min: 59°F/max: 61°F)
April 62°F (min: 60°F/max: 65°F)
May 67°F (min: 61°F/max: 73°F)
June 73°F (min: 69°F/max: 77°F)
July 79°F (min: 75°F/max: 83°F)
August 82°F (min: 79°F/max: 85°F)
September 80°F (min: 78°F/max: 83°F)
October 76°F (min: 73°F/max: 79°F)
November 71°F (min: 68°F/max: 75°F)
December 66°F (min: 61°F/max: 71°F)

Water temperature variation in Nagasaki throughout the year

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