Connecticut River — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in the Connecticut River, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in the Connecticut River today is 21.9°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
✅ As of today, the minimum water temperature ranges from 68°F (20°C) to 74°F (23°C). The water is warm and pleasant for swimming, and in this range, one can stay in the water for extended periods without the risk of hypothermia. This is the ideal temperature for relaxation, swimming, and water sports. Families with children, as well as outdoor enthusiasts, will enjoy swimming and time spent in the water. For most people, this is the optimal temperature for a comfortable beach experience. 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 |
|---|---|---|---|
| AUG 24 | 21.8°C | 20.1°C | |
| AUG 25 | 21.7°C | 20.1°C | |
| AUG 26 | 21.6°C | 20.1°C | |
| AUG 27 | 21.6°C | 20.1°C | |
| AUG 28 | 21.6°C | 20.1°C | |
| AUG 29 | 21.6°C | 20.1°C | |
| AUG 30 | 21.6°C | 20.1°C | |
| AUG 31 | 21.9°C | 20.1°C | |
| SEP 1 | 15.5°C | 21.6°C | |
| SEP 2 | 15.5°C | 21.3°C | |
| SEP 3 | 15.5°C | 20.9°C | |
| SEP 4 | 15.5°C | 20.6°C | |
| SEP 5 | 15.5°C | 20.3°C | |
| SEP 6 | 15.5°C | 20.0°C | |
| SEP 7 | 15.5°C | 19.7°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 | 0°C | 5°C | 9°C |
| February | 0°C | 5°C | 9°C |
| March | 0°C | 6°C | 11°C |
| April | 1°C | 9°C | 16°C |
| May | 8°C | 13°C | 21°C |
| June | 12°C | 17°C | 22°C |
| July | 17°C | 21°C | 26°C |
| August | 17°C | 20°C | 24°C |
| September | 11°C | 16°C | 20°C |
| October | 8°C | 13°C | 18°C |
| November | 3°C | 8°C | 16°C |
| December | 1°C | 5°C | 8°C |
Connecticut River: Water Temperature by Location
Connecticut River: Weather Forecast
September 1
September 2
September 3
September 4
September 5
Location & Local Information
The Connecticut River, which runs through the state of Connecticut, is a vital waterway for both the environment and recreation. The water temperature in the river can vary significantly depending on the season. During the cooler months, typically from fall to early spring, the water temperature can dip as low as 40°F (4°C), making it quite chilly and not suitable for swimming. As the weather warms in late spring and summer, the river's temperature gradually rises, reaching a range of 60°F to 70°F (16°C to 21°C) in the warmer months. These temperatures make the river more tolerable for recreational activities, but the water remains cooler than what you might find in lakes or pools.
While the Connecticut River is not typically known as a prime location for swimming, it offers great opportunities for other water activities, such as kayaking, canoeing, and boating. The cool temperatures can actually be refreshing for those who are engaging in these activities, especially during the summer when the air temperature can get quite warm. Swimming is still possible, especially in areas where the river widens and has slower currents, but it may not be ideal for extended periods due to the cooler water temperature.
For those who prefer warmer conditions for swimming, it’s common to head to nearby lakes or public pools during the summer months. Connecticut has many parks and lakes where water temperatures can reach 70°F to 80°F (21°C to 27°C), offering a more comfortable environment for a swim. These alternatives provide an excellent opportunity for residents and visitors to enjoy water activities in more moderate temperatures.