Best time to swim in Philadelphia in the United States (USA) Sea temperature by month

Do you want to swim in the sea in Philadelphia in the United States (USA)? But when is the best time to go to be sure to have pleasant water for swimming in Philadelphia 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 Philadelphia, based on the average temperatures recorded in previous years.

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

Do you feel like swimming in Philadelphia in the United States (USA)? 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 42°F (min: 38°F/max: 47°F)
February 40°F (min: 38°F/max: 43°F)
March 41°F (min: 39°F/max: 45°F)
April 47°F (min: 41°F/max: 53°F)
May 54°F (min: 47°F/max: 61°F)
June 67°F (min: 59°F/max: 74°F)
July 75°F (min: 71°F/max: 78°F)
August 77°F (min: 73°F/max: 81°F)
September 72°F (min: 68°F/max: 76°F)
October 65°F (min: 59°F/max: 71°F)
November 56°F (min: 52°F/max: 60°F)
December 48°F (min: 43°F/max: 53°F)

Water temperature variation in Philadelphia throughout the year

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