This data the coastal Philadelphia water temperature today, tomorrow and the upcoming days. Besides, you can also get information about the weather and surf forecast, as well as the data on sunrise / sunset and moonrise / moonset at a given point on any given day.
Water temperature in Philadelphia today is 71.6°F. Based on our historical data over a period of ten years, the warmest water in this day in Philadelphia was recorded in 2023 and was 78.8°F, and the coldest was recorded in 2024 at 68°F. Water temperature in Philadelphia is expected to be constant 71.6°F in the next 10 days. September average water temperature in Philadelphia is 70.9°F, the minimum temperature is 62.6°F, and the maximum is 80.6°F.
The swimming season in Philadelphia lasts from June to September. During those months, Philadelphia water temperature does not drop below 68°F and therefore suitable for comfortable swimming. The average water temperature in Philadelphia in winter reaches 39.9°F, in spring 53.4°F, in summer the average temperature rises to 76.3°F, and in autumn it is 60.6°F.
September 6, 2025 |
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today temp |
71.6°F |
September 5, 2025 |
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yesterday temp |
71.6°F |
Data in a table show Philadelphia temperature today (September 6, 2025). For more information and forecast for a few days, go to the weather forecast Philadelphia.
0-3 h | 3-6 h | 6-9 h | 9-12 h |
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76.1°F | 73.2°F | 72.1°F | 78.3°F |
12-15 h | 15-18 h | 18-21 h | 21-24 h |
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90.9°F | 88.3°F | 80.2°F | 71.2°F |
You may also be interested in other sections of our site for Philadelphia: Sunrise and Sunset
These figures shows the average, minimum and maximum monthly water temperature in Philadelphia. In addition to the table values, the graph below displays of changes average surface temperature during the year. Values are calculated based on the data over the past 10 years. Using them, you can check the water temperature in Philadelphia on any day of this period that interests you. Click on the month link and you will see a table for each day, or alternatively you can view the temperature curve of the month and select 2 different years you want to compare, either in a table or as a curve
Month | Avr | Min | Max | |
---|---|---|---|---|
January | 39.2°F | 33.8°F | 50°F | cold |
Water temperature in Philadelphia in January | ||||
February | 39°F | 33.8°F | 50°F | cold |
Water temperature in Philadelphia in February | ||||
March | 43.5°F | 35.6°F | 55.4°F | cold |
Water temperature in Philadelphia in March | ||||
April | 53.2°F | 44.6°F | 64.4°F | cold |
Water temperature in Philadelphia in April | ||||
May | 63.3°F | 51.8°F | 75.2°F | cold |
Water temperature in Philadelphia in May | ||||
June | 72.5°F | 64.4°F | 84.2°F | warm |
Water temperature in Philadelphia in June | ||||
July | 79°F | 73.4°F | 86°F | hot |
Water temperature in Philadelphia in July | ||||
August | 77.4°F | 71.6°F | 84.2°F | hot |
Water temperature in Philadelphia in August | ||||
September | 70.9°F | 62.6°F | 80.6°F | warm |
Water temperature in Philadelphia in September | ||||
October | 61°F | 53.6°F | 68°F | cold |
Water temperature in Philadelphia in October | ||||
November | 50°F | 39.2°F | 64.4°F | cold |
Water temperature in Philadelphia in November | ||||
December | 41.4°F | 37.4°F | 50°F | cold |
Water temperature in Philadelphia in December |