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Water Temperature in Washington in Potomac River: Current and Forecast
On this page, you will find comprehensive information about the water temperature in Washington in Potomac River, including current readings, historical data and trends, monthly averages, as well as weather forecasts and upcoming temperature predictions. We find every spot where you can swim and tell you what the water temperature is there today and throughout the year.
Current Water Temperature in Washington
18.6°C
TODAY
18.4°C
YESTERDAY
21.3°C
A WEEK AGO
As of today, the minimum water temperature in Washington ranges from 65°F (18°C) to 68°F (20°C). This is already quite warm water, which is ideal for most people. Swimming becomes comfortable, and prolonged stays in the water do not cause discomfort. This temperature is perfect for family trips and for those who prefer warmer water. It is also comfortable for water sports such as surfing or swimming.
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.
Analysis, Historical Data, and Forecast of Water Temperature
Water Temperature Chart for Potomac River in Washington Over the Last 30 Days
Today the water temperature in Washington is higher than the same day in previous years. The water temperature range here in October is from 8°C to 21°C. The water temperature has decreased over the past 7 days but has increased over the past month.
The forecasted water temperature values for Washington are presented in the table below.
The actual water temperature values near the shore may differ by a few degrees from the stated values. For the development of the forecast, we use our own mathematical model that takes into account the current water temperature changes, historical data, and key weather trends, including wind strength and direction, and air temperature in each specific region.
Table of Daily Water Temperature Data
| Date | Current | Average | Forecast |
|---|---|---|---|
| Sep 30 | 21.3°C | 16.5°C | |
| Oct 1 | 21.1°C | 14.5°C | |
| Oct 2 | 21.4°C | 14.5°C | |
| Oct 3 | 20.6°C | 14.5°C | |
| Oct 4 | 19.8°C | 14.5°C | |
| Oct 5 | 18.5°C | 14.5°C | |
| Oct 6 | 18.4°C | 14.5°C | |
| Oct 7 | 18.6°C | 14.5°C | |
| Oct 8 | 14.5°C | 18.2°C | |
| Oct 9 | 14.5°C | 17.8°C | |
| Oct 10 | 14.5°C | 17.5°C | |
| Oct 11 | 14.5°C | 17.2°C | |
| Oct 12 | 14.5°C | 16.9°C | |
| Oct 13 | 14.5°C | 16.7°C | |
| Oct 14 | 14.5°C | 16.5°C | |
| Oct 15 | 14.5°C | 16.3°C |
Water Temperature Ranges in Washington by Month
January
| Minimum | Average | Maximum |
|---|---|---|
| 2°C | 5.5°C | 9°C |
February
| Minimum | Average | Maximum |
|---|---|---|
| 2°C | 5.5°C | 9°C |
March
| Minimum | Average | Maximum |
|---|---|---|
| 3°C | 9°C | 15°C |
April
| Minimum | Average | Maximum |
|---|---|---|
| 5°C | 11.5°C | 18°C |
May
| Minimum | Average | Maximum |
|---|---|---|
| 8°C | 13.4°C | 21°C |
June
| Minimum | Average | Maximum |
|---|---|---|
| 14°C | 19°C | 24°C |
July
| Minimum | Average | Maximum |
|---|---|---|
| 17°C | 23°C | 29°C |
August
| Minimum | Average | Maximum |
|---|---|---|
| 17°C | 23°C | 29°C |
September
| Minimum | Average | Maximum |
|---|---|---|
| 11°C | 16.5°C | 22°C |
October
| Minimum | Average | Maximum |
|---|---|---|
| 8°C | 14.5°C | 21°C |
November
| Minimum | Average | Maximum |
|---|---|---|
| 3°C | 8.1°C | 16°C |
December
| Minimum | Average | Maximum |
|---|---|---|
| 3°C | 4.7°C | 8°C |
Monthly Water Temperature Histogram for Potomac River in Washington
Washington Weather
OCTOBER 8
17°C / 24°C
moderate rain showersrain: 58% | wind: 14 km/h
OCTOBER 9
11°C / 21°C
light drizzlerain: 29% | wind: 21 km/h
OCTOBER 10
8°C / 19°C
overcastrain: 11% | wind: 12 km/h
Water Temperature in Washington: General Trends and Swimming Opportunities
The Potomac River, flowing through Washington, D.C., is a scenic and popular area for a variety of water activities, including boating, kayaking, and fishing. However, when it comes to swimming, the river's temperature can vary significantly depending on the season. During the winter months, the water can be quite cold, with temperatures often hovering around 40°F (4°C). This makes swimming in the Potomac during colder weather impractical and unsafe due to the risk of hypothermia.
In the spring and early summer, the river's water temperature begins to rise, typically reaching around 60°F (15°C) to 70°F (21°C) by late spring. This can make for a more comfortable swimming experience, but the river’s current and water quality are important factors to consider. Due to its fast-moving waters, swimming in certain areas of the Potomac can be dangerous, particularly near bridges or industrial zones. As such, swimming is generally discouraged in many parts of the river, and those who do swim often choose designated areas that are monitored for safety.
By mid to late summer, the temperature of the Potomac can rise to around 75°F (24°C) to 80°F (27°C) in calmer, more sheltered parts of the river, which is more suitable for swimming. However, it is still important to be cautious of the water quality, as the river can occasionally experience pollution due to runoff and other factors. Most residents of Washington, D.C., seeking a safer and more pleasant swimming experience typically opt for the city’s public pools or nearby lakes, where the water is more consistently warm and less affected by strong currents.
Geographical Location of Washington
Nearby Cities
Frequently Asked Questions About Washington and its Water Temperatures
What is the current water temperature in Washington?
The water temperature today in Washington is 65°F (18.6°C).
What is the water temperature in Washington during the summer months?
The average water temperature in Washington during the summer months is typically between 65°F to 71°F (19°C to 21°C), and it can reach up to 75°F (24°C) at its warmest. However, in some years, the temperature may exceed this range.
What is the water temperature in Washington in May?
The average water temperature in Washington in May ranges from 46°F to 70°F (8°C to 21°C).
What is the water temperature in Washington in September?
The average water temperature in Washington in September is typically between 52°F to 66°F (11°C to 19°C).
Is it possible to swim in the Potomac River in Washington, and what are the available options for doing so?
Yes, it's possible to swim in the Potomac River in Washington; however, it's generally not recommended due to strong currents and potentially poor water quality. Options include certain designated shallow areas or organized open-water swim events with precautions in place.