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Nashua

Water Temperature in Nashua in Merrimack River: Current and Forecast

On this page, you will find comprehensive information about the water temperature in Nashua in Merrimack 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 Nashua

35°F

TODAY

35°F

YESTERDAY

35°F

A WEEK AGO

As of today, the minimum water temperature in Nashua ranges less than 41°F (5°C). Such water is extremely cold and not recommended for swimming without proper preparation. In these conditions, the risk of hypothermia is very high, and prolonged exposure to the water can be hazardous to your health. If you decide to swim, it is important to have the appropriate gear, such as a wetsuit. Typically, only experienced swimmers or those who practice winter swimming venture into such waters.

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 Merrimack River in Nashua Over the Last 30 Days

Today the water temperature in Nashua is lower than the same day in previous years. The water temperature range here in February is from 34°F to 48°F. The water temperature has decreased over the past 7 days but has increased over the past month.

The forecasted water temperature values for Nashua 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

DateCurrentAverageForecast
Feb 1635°F41°F
Feb 1735°F41°F
Feb 1834°F41°F
Feb 1934°F41°F
Feb 2034°F41°F
Feb 2134°F41°F
Feb 2235°F41°F
Feb 2335°F41°F
Feb 2441°F35°F
Feb 2541°F36°F
Feb 2641°F36°F
Feb 2741°F37°F
Feb 2841°F37°F
Mar 144°F37°F
Mar 244°F38°F
Mar 344°F38°F
* Current - Actual water temperature value
** Average - Average water temperature on this day in recent years
*** Forecast - Our water temperature forecast

Water Temperature Ranges in Nashua by Month

January

MinimumAverageMaximum
34°F41°F48°F

February

MinimumAverageMaximum
34°F41°F48°F

March

MinimumAverageMaximum
37°F44°F52°F

April

MinimumAverageMaximum
41°F50°F61°F

May

MinimumAverageMaximum
46°F56°F70°F

June

MinimumAverageMaximum
57°F65°F72°F

July

MinimumAverageMaximum
63°F68°F75°F

August

MinimumAverageMaximum
63°F71°F73°F

September

MinimumAverageMaximum
52°F64°F66°F

October

MinimumAverageMaximum
46°F56°F61°F

November

MinimumAverageMaximum
37°F47°F61°F

December

MinimumAverageMaximum
37°F40°F46°F

Monthly Water Temperature Histogram for Merrimack River in Nashua

Nashua Weather

FEBRUARY 23

12°F / 36°F
light drizzle

rain: 6% | wind: 11 mph

FEBRUARY 24

12°F / 34°F
light drizzle

rain: 7% | wind: 5 mph

FEBRUARY 25

32°F / 41°F
light drizzle

rain: 15% | wind: 10 mph

FEBRUARY 26

34°F / 43°F
fog

rain: 16% | wind: 12 mph

FEBRUARY 27

28°F / 36°F
moderate snow fall

rain: 31% | wind: 11 mph

Water Temperature in Nashua: General Trends and Swimming Opportunities

In Nashua, New Hampshire, the Merrimack River is a prominent waterway, but it is not commonly used for swimming due to its fast currents and the quality of the water. During the warmer months, the river’s temperature can range between 60°F (15°C) to 75°F (24°C), with the highest temperatures occurring in late summer. While these temperatures might be suitable for wading or kayaking, they are generally not ideal for recreational swimming due to the river’s unpredictable current and depth variations.

Though the river offers fantastic opportunities for boating, fishing, and other water-based activities, swimming in the Merrimack River in Nashua is not considered safe. Strong currents, varying water quality, and potential hazards from submerged debris make swimming risky. Local authorities often advise against swimming in the river, as the conditions may not be conducive to a safe experience.

For those seeking a more traditional swimming experience, Nashua has several public parks, community pools, and nearby lakes that provide safe and clean areas for swimming. These locations offer a much more suitable environment for swimming, with calmer water and controlled conditions, making them a better option for anyone looking to enjoy a refreshing dip.

Geographical Location of Nashua

Frequently Asked Questions About Nashua and its Water Temperatures

What is the current water temperature in Nashua?

The water temperature today in Nashua is 35°F (1.7°C).

What is the water temperature in Nashua during the summer months?

The average water temperature in Nashua 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 Nashua in May?

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

What is the water temperature in Nashua in September?

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

Is it possible to swim in the Merrimack River in Nashua, and what are the available options for doing so?

Yes, it is possible to swim in the Merrimack River in Nashua. You may enter through public access points such as Greely Park and Sullivan Park, or via a kayak or canoe.