Nashua — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Nashua, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Nashua today is 20.1°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 |
|---|---|---|---|
| JUN 23 | 21.2°C | 17.8°C | |
| JUN 24 | 21.2°C | 17.8°C | |
| JUN 25 | 21.2°C | 17.8°C | |
| JUN 26 | 21.2°C | 17.8°C | |
| JUN 27 | 21.3°C | 17.8°C | |
| JUN 28 | 21.4°C | 17.8°C | |
| JUN 29 | 19.8°C | 17.8°C | |
| JUN 30 | 20.1°C | 17.8°C | |
| JUL 1 | 20.0°C | 20.1°C | |
| JUL 2 | 20.0°C | 20.1°C | |
| JUL 3 | 20.0°C | 20.1°C | |
| JUL 4 | 20.0°C | 20.1°C | |
| JUL 5 | 20.0°C | 20.1°C | |
| JUL 6 | 20.0°C | 20.1°C | |
| JUL 7 | 20.0°C | 20.1°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 | 1°C | 5°C | 9°C |
| March | 1°C | 6°C | 11°C |
| April | 3°C | 10°C | 16°C |
| May | 8°C | 13°C | 21°C |
| June | 13°C | 18°C | 22°C |
| July | 17°C | 20°C | 24°C |
| August | 17°C | 21°C | 24°C |
| September | 11°C | 17°C | 22°C |
| October | 8°C | 14°C | 19°C |
| November | 3°C | 8°C | 16°C |
| December | 0°C | 4°C | 8°C |
Nashua: Weather Forecast
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July 4
July 5
Location & Local Information
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.