Philadelphia — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Philadelphia, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Philadelphia today is 78°F.
Water Temperature: Daily Trends, Historical Records, and Forecast
✅ As of today, the minimum water temperature ranges from 75°F (23°C) to 79°F (26°C). This is a very comfortable temperature for swimming, and many people can enjoy prolonged stays in the water without feeling cold. The water is pleasantly warm, making it ideal for relaxation and water sports. This temperature range is particularly popular among tourists, as it combines comfort and safety for health. It is important to note that these swimming tips and recommendations apply only in good weather. When the air temperature is below 68°F (20°C), and sometimes even below 77°F (25°C), swimming can be unpleasant even with relatively high water temperatures.
Water Temperature Chart Over the Last 30 Days
Table of Daily Sea Temperature Data
| Date | Current | Average | Forecast |
|---|---|---|---|
| JUL 3 | 79°F | 73°F | |
| JUL 4 | 80°F | 73°F | |
| JUL 5 | 82°F | 73°F | |
| JUL 6 | 80°F | 73°F | |
| JUL 7 | 79°F | 73°F | |
| JUL 8 | 79°F | 73°F | |
| JUL 9 | 78°F | 73°F | |
| JUL 10 | 78°F | 73°F | |
| JUL 11 | 73°F | 77°F | |
| JUL 12 | 73°F | 77°F | |
| JUL 13 | 73°F | 77°F | |
| JUL 14 | 73°F | 77°F | |
| JUL 15 | 73°F | 76°F | |
| JUL 16 | 73°F | 76°F | |
| JUL 17 | 73°F | 76°F |
* Current - Actual water temperature value
** Average - Average water temperature on this day in recent years
*** Forecast - Our water temperature forecast
Actual nearshore water temperatures may fluctuate by several degrees from the reported values, especially following heavy rainfall or extended periods of strong winds. Certain wind patterns can cause colder, deeper waters to rise and replace the sun-warmed surface water, leading to noticeable variations.
Our forecast is based on a proprietary mathematical model that considers real-time water temperature changes, historical trends, key weather patterns, wind strength and direction, and air temperature specific to each region. Additionally, we incorporate data from other resorts to enhance accuracy.
Monthly Water Temperature Range (Min, Max & Average)
| Month | Min | Avg | Max |
|---|---|---|---|
| January | 32°F | 40°F | 48°F |
| February | 32°F | 40°F | 48°F |
| March | 36°F | 45°F | 54°F |
| April | 41°F | 53°F | 64°F |
| May | 46°F | 56°F | 70°F |
| June | 57°F | 69°F | 81°F |
| July | 63°F | 73°F | 82°F |
| August | 63°F | 73°F | 82°F |
| September | 52°F | 64°F | 75°F |
| October | 46°F | 60°F | 73°F |
| November | 37°F | 47°F | 61°F |
| December | 36°F | 42°F | 46°F |
Philadelphia: Weather Forecast
July 11
July 12
July 13
July 14
Location & Local Information
In Philadelphia, the Delaware River serves as a significant waterway, but it is not commonly used for swimming. The water temperature in the Delaware River near Philadelphia varies throughout the year. In winter, the water can be quite cold, with temperatures dropping to around 40°F (4°C), while during the summer, the river's water temperature can reach around 70°F (21°C). Despite the warmer temperatures in the summer, the river is often too cold and unpredictable for safe swimming.
Swimming in the Delaware River near Philadelphia is not recommended due to several factors. The river has strong currents and occasional tides, which can be hazardous for swimmers. The water quality can also be a concern, as the river serves as a major transportation route and industrial hub, which sometimes leads to contamination from runoff and waste. While there are designated spots along the river for recreational activities like kayaking and boating, the Delaware is not typically considered a safe or pleasant location for swimming.
For those looking to swim in Philadelphia, there are various public swimming pools, beaches, and water parks that offer much safer and more controlled environments. The city’s recreational areas, such as the Schuylkill River Trail, provide alternatives for outdoor activities, but the Delaware River itself remains unsuitable for recreational swimming due to the strong currents, lower water temperatures, and occasional water quality concerns.