Cambridge — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Cambridge, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Cambridge today is 21.7°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 |
|---|---|---|---|
| SEP 14 | 21.9°C | 16.5°C | |
| SEP 15 | 21.7°C | 16.5°C | |
| SEP 16 | 21.6°C | 16.5°C | |
| SEP 17 | 21.0°C | 16.5°C | |
| SEP 18 | 20.2°C | 16.5°C | |
| SEP 19 | 21.0°C | 16.5°C | |
| SEP 20 | 21.6°C | 16.5°C | |
| SEP 21 | 21.7°C | 16.5°C | |
| SEP 22 | 16.5°C | 21.4°C | |
| SEP 23 | 16.5°C | 21.2°C | |
| SEP 24 | 16.5°C | 20.9°C | |
| SEP 25 | 16.5°C | 20.7°C | |
| SEP 26 | 16.5°C | 20.4°C | |
| SEP 27 | 16.5°C | 20.1°C | |
| SEP 28 | 16.5°C | 19.9°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 | 3°C | 4°C | 9°C |
| February | 2°C | 6°C | 9°C |
| March | 3°C | 7°C | 11°C |
| April | 4°C | 10°C | 16°C |
| May | 8°C | 13°C | 21°C |
| June | 13°C | 18°C | 22°C |
| July | 17°C | 21°C | 25°C |
| August | 17°C | 21°C | 25°C |
| September | 11°C | 17°C | 22°C |
| October | 8°C | 14°C | 19°C |
| November | 3°C | 8°C | 16°C |
| December | 3°C | 5°C | 8°C |
Cambridge: Weather Forecast
September 21
September 22
September 23
September 24
September 25
September 26
Location & Local Information
In Cambridge, Massachusetts, the Charles River is an iconic part of the cityscape, winding along its borders and offering a mix of recreational opportunities. The water temperature in the river varies significantly throughout the year. In the summer months, it typically ranges from 65°F to 75°F (18°C to 24°C), making the water feel refreshing but not too cold. However, swimming in the Charles River has historically been limited due to water quality concerns, although recent cleanup efforts have made significant improvements.
Public swimming in the Charles River is not generally permitted outside of special events like the annual City Splash, where residents can experience swimming under supervised conditions. These events highlight the river's growing suitability for recreation and serve as a reminder of its improved health. While casual swimming is not a regular activity, the river remains a popular spot for rowing, kayaking, and enjoying the scenic views.
For those in Cambridge looking to cool off, nearby pools or designated swimming areas outside the river are recommended. The Charles River continues to evolve as a recreational hub, offering both locals and visitors a chance to connect with nature in the heart of an urban setting.