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Charles River

Charles River Current Water Temperature and Forecast

On this page, you will find comprehensive information about the water temperature in Charles 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 Charles River

19.8°C

TODAY

20.0°C

YESTERDAY

19.1°C

A WEEK AGO

As of today, the minimum water temperature in the Charles River 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 Charles River Over the Last 30 Days

Today the water temperature in Charles River is higher than the same day in previous years. The water temperature range here in June is from 14°C to 22°C. The water temperature is trending upward, and it has increased both over the past 30 days and the past week.

The forecasted water temperature values for Charles River 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.

Daily Water Temperature Chart

DateCurrentAverageForecast
Jun 2119.1°C18.5°C
Jun 2219.3°C18.5°C
Jun 2319.0°C18.5°C
Jun 2419.0°C18.5°C
Jun 2520.0°C18.5°C
Jun 2620.0°C18.5°C
Jun 2720.0°C18.5°C
Jun 2819.8°C18.5°C
Jun 2918.5°C19.7°C
Jun 3018.5°C19.6°C
Jul 120.0°C19.6°C
Jul 220.0°C19.6°C
Jul 320.0°C19.6°C
Jul 420.0°C19.6°C
Jul 520.0°C19.6°C
Jul 620.0°C19.6°C
* Current - Actual water temperature value
** Average - Average water temperature on this day in recent years
*** Forecast - Our water temperature forecast

Water Temperature Ranges in Charles River by Month

January

MinimumAverageMaximum
3°C4.2°C9°C

February

MinimumAverageMaximum
3°C5.3°C9°C

March

MinimumAverageMaximum
3°C8°C13°C

April

MinimumAverageMaximum
5°C12°C19°C

May

MinimumAverageMaximum
8°C13.4°C21°C

June

MinimumAverageMaximum
14°C18.5°C22°C

July

MinimumAverageMaximum
17°C20°C24°C

August

MinimumAverageMaximum
17°C21.4°C23°C

September

MinimumAverageMaximum
11°C17.6°C19°C

October

MinimumAverageMaximum
8°C13.3°C16°C

November

MinimumAverageMaximum
3°C8.1°C16°C

December

MinimumAverageMaximum
3°C4.7°C8°C

Monthly Water Temperature Histogram for Charles River

Water Temperature in Cities and Towns on Charles River

Medfield
United States (Massachusetts)
20.4°C
Boston
United States (Massachusetts)
21.0°C
United States (Massachusetts)
19.9°C
United States (Massachusetts)
19.9°C

Known Beaches in the Area of Charles River?

Membership Beach

Membership Beach is a 1-stars sandy beach, located in a 3 km (2 miles) radius of Charles River.

Morses Pond Beach

Morses Pond Beach is a 3-stars sandy beach, located in a 6 km (4 miles) radius of Charles River. There are lifeguards on the beach. There is parking. There are restrooms. Morses Pond Beach is an excellent spot for fishing enthusiasts, offering good opportunities to catch local fish.

Havey Beach

Havey Beach is a 1-stars sandy beach, located in a 8 km (5 miles) radius of Charles River.

Crystal Lake Beach

Crystal Lake Beach is a 3-stars sandy beach, located in a 10 km (6 miles) radius of Charles River. There are lifeguards on the beach. There is parking.

Harvey Beach

Harvey Beach is a 1-stars sandy beach, located in a 10 km (6 miles) radius of Charles River.

Charles River Weather

JUNE 29

18°C / 30°C
fog

rain: 34% | wind: 13 km/h

JUNE 30

16°C / 33°C
mainly clear

rain: 1% | wind: 17 km/h

JULY 1

17°C / 32°C
slight rain showers

rain: 47% | wind: 23 km/h

JULY 2

21°C / 32°C
overcast

rain: 47% | wind: 20 km/h

JULY 3

16°C / 31°C
overcast

rain: 3% | wind: 19 km/h

Water Temperature in Charles River: General Trends and Swimming Opportunities

Source Echo Lake
• location Hopkinton, Massachusetts, United States
• elevation 350 ft (110 m)
Mouth Boston Harbor
• location Boston, Massachusetts, United States
• elevation 0 ft (0 m)
Length 80 mi (130 km)

The Charles River, flowing through eastern Massachusetts, is a historically significant and picturesque waterway stretching over 80 miles from Hopkinton to Boston Harbor. While it serves as a vital cultural and recreational hub, its water quality and suitability for swimming have been subjects of much effort and improvement over the years. Thanks to rigorous environmental initiatives, the river is now considered safe for swimming on certain days, particularly during organized events like the Charles River Swimming Club’s annual races. However, swimming is not universally permitted and depends on specific locations and water quality conditions.

Water temperature in the Charles River varies seasonally, making it most inviting during the summer months, typically ranging from 68°F to 75°F (20°C to 24°C) in July and August. These temperatures align with comfortable swimming conditions, though the experience may still depend on the day's weather and water cleanliness. Outside the summer, the river cools significantly, especially in the winter, when temperatures can drop near freezing, rendering it unsuitable for swimming. While casual swimming opportunities remain limited due to safety and environmental concerns, the Charles River remains an iconic destination for kayaking, rowing, and enjoying waterfront views.

Geographical Location of Charles River

Frequently Asked Questions About Charles River and its Water Temperatures

What is the current water temperature in Charles River?

The water temperature today in Charles River ranges from 68°F (19.9°C) to 70°F (21.0°C).

What is the water temperature in Charles River during the summer months?

The average water temperature in Charles River 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 Charles River in May?

The average water temperature in Charles River in May ranges from 46°F to 70°F (8°C to 21°C).

What is the water temperature in Charles River in September?

The average water temperature in Charles River in September is typically between 52°F to 66°F (11°C to 19°C).

Where does Charles River flow?

Charles River flows through United States (Massachusetts).

Is it possible to swim in the Charles River?

Yes, it is possible to swim in the Charles River. However, local authorities advise checking current water quality reports for safety purposes.

What major cities are located on Charles River?

Cities along the course of Charles River include Cambridge (Massachusetts), Dedham (Massachusetts).