Potomac River — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in the Potomac River, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in the Potomac River today is 26.9°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
✅ As of today, the minimum water temperature ranges from 79°F (26°C) to 82°F (28°C). This is very warm water, allowing for extended stays without any discomfort. Swimming in these conditions will be particularly enjoyable, making it the ideal temperature range for those who want to relax in the sea. Additionally, water in this temperature range is suitable for children and elderly people, as it is comfortable for prolonged stays. 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 16 | 27.1°C | 22.9°C | |
| JUL 17 | 27.3°C | 22.9°C | |
| JUL 18 | 27.4°C | 22.9°C | |
| JUL 19 | 27.4°C | 22.9°C | |
| JUL 20 | 27.9°C | 22.9°C | |
| JUL 21 | 27.6°C | 22.9°C | |
| JUL 22 | 27.3°C | 22.9°C | |
| JUL 23 | 26.9°C | 22.9°C | |
| JUL 24 | 22.9°C | 26.7°C | |
| JUL 25 | 22.9°C | 26.5°C | |
| JUL 26 | 22.9°C | 26.3°C | |
| JUL 27 | 22.9°C | 26.1°C | |
| JUL 28 | 22.9°C | 25.9°C | |
| JUL 29 | 22.9°C | 25.7°C | |
| JUL 30 | 22.9°C | 25.5°C |
* 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 | 1°C | 5°C | 9°C |
| February | 0°C | 5°C | 9°C |
| March | 3°C | 9°C | 15°C |
| April | 5°C | 11°C | 18°C |
| May | 8°C | 15°C | 23°C |
| June | 14°C | 19°C | 25°C |
| July | 17°C | 23°C | 29°C |
| August | 17°C | 21°C | 25°C |
| September | 11°C | 17°C | 23°C |
| October | 8°C | 15°C | 21°C |
| November | 3°C | 8°C | 16°C |
| December | 3°C | 5°C | 8°C |
Potomac River: Water Temperature by Location
Potomac River: Weather Forecast
July 24
July 25
July 26
July 27
July 28
Location & Local Information
Source North Branch
• location Fairfax Stone, Preston County, West Virginia
Mouth Chesapeake Bay
• location St. Mary's County, Maryland/Northumberland County, Virginia, United States
Length 405 mi (652 km)
The Potomac River, flowing through the U.S. states of Maryland, Virginia, and Washington, D.C., offers a variety of recreational activities, including swimming. Water temperatures in the river can fluctuate depending on the season, typically ranging from about 40°F (4°C) during the winter months to 70-80°F (21-27°C) in the summer, making it more comfortable for swimming as the weather warms up. While the Potomac is not as warm as some southern rivers, it still provides a refreshing dip for those who enjoy outdoor activities along the riverbanks.
Swimming in the Potomac River is popular in certain areas, particularly in recreational zones such as Theodore Roosevelt Island and near the Great Falls Park. These areas offer calmer stretches of the river where swimmers can safely enjoy the water. However, in other parts of the river, currents can be strong and the water may be murky, which can pose safety risks. Many people prefer to swim in designated areas or participate in water sports like kayaking and canoeing, where they can maintain better control of their experience. Despite these factors, the Potomac remains a beloved destination for water activities and provides a scenic backdrop for those looking to enjoy the outdoors.