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Water temperature in Philadelphia (PA) in April

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Is it warm enough to swim in Philadelphia in April? Average water temperature in Philadelphia in April is 53.2°F and therefore is not suitable for comfortable swimming. The warmest water in Philadelphia in April is 64.4°F, and the coldest is 44.6°F. To find out the water temperature today and in the coming days, go to Current water temperature in Philadelphia

Changes water temperature in Philadelphia in April 2025, 2024

To get an accurate forecast for the water temperature in Philadelphia for any chosen month, compare two years within a 10 year range using the chart below.

You can choose any other years:

Year 1:   Year 2:


Day 2025 2024
April 148.2°F48.2°F
April 250°F48.2°F
April 350°F48.2°F
April 450°F48.2°F
April 551.8°F46.4°F
April 651.8°F46.4°F
April 751.8°F48.2°F
April 850°F48.2°F
April 946.4°F50°F
April 1044.6°F55.4°F
April 1144.6°F55.4°F
April 1246.4°F53.6°F
April 1348.2°F53.6°F
April 1448.2°F51.8°F
April 1550°F53.6°F
Day 2025 2024
April 1650°F59°F
April 1750°F59°F
April 1850°F59°F
April 1951.8°F59°F
April 2051.8°F55.4°F
April 2153.6°F53.6°F
April 2253.6°F53.6°F
April 2353.6°F53.6°F
April 2455.4°F53.6°F
April 2557.2°F53.6°F
April 2657.2°F53.6°F
April 2759°F57.2°F
April 2857.2°F60.8°F
April 2959°F62.6°F
April 3059°F64.4°F

Philadelphia water temperature during other months:

You can also view information about water temperature for other months by clicking on the month button below

Where is the warm sea water in April?

Want to know where the water temperature in April is good for swimming? Select the continent of interest, the day of the month and the required water temperature

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Date (day and month)
Water temperature: min 60°F
 Average temperature  Maximum temperature

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[1] - The "Blue Flag" is awarded to beaches which fulfill a number of criteria, including: the quality of the bathing water, which must be in accordance with the relevant European Union Directive environmental education and information and beach area management and safety.

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Our report for Philadelphia is compiled using satellite data together with in-situ observations to get the most reliable daily data of sea surface temperatures, surf forecasts, current temperatures and weather forecasts.

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