Merrymeeting Lake — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Merrymeeting Lake, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Merrymeeting Lake today is 9.3°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
❌ As of today, the minimum water temperature ranges from 47°F (8°C) to 50°F (10°C). This is still cool water, suitable only for experienced swimmers or those accustomed to cold water. Swimming in such conditions is possible, but not recommended for prolonged periods. Extra caution should be taken during extended exposure, as the cold water can cause heat loss and lead to hypothermia. For added comfort, special clothing can be used. 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 |
|---|---|---|---|
| OCT 26 | 11.4°C | 15.5°C | |
| OCT 27 | 11.3°C | 15.5°C | |
| OCT 28 | 11.7°C | 15.5°C | |
| OCT 29 | 11.2°C | 15.5°C | |
| OCT 30 | 10.5°C | 15.5°C | |
| OCT 31 | 10.4°C | 15.5°C | |
| NOV 1 | 11.5°C | 8.4°C | |
| NOV 2 | 9.3°C | 8.4°C | |
| NOV 3 | 8.4°C | 9.3°C | |
| NOV 4 | 8.4°C | 9.2°C | |
| NOV 5 | 8.4°C | 9.2°C | |
| NOV 6 | 8.4°C | 9.1°C | |
| NOV 7 | 8.4°C | 9.1°C | |
| NOV 8 | 8.4°C | 9.0°C | |
| NOV 9 | 8.4°C | 9.0°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 | 1°C | 8°C | 15°C |
| February | 1°C | 7°C | 13°C |
| March | 2°C | 8°C | 13°C |
| April | 2°C | 9°C | 16°C |
| May | 8°C | 14°C | 19°C |
| June | 13°C | 17°C | 21°C |
| July | 19°C | 25°C | 31°C |
| August | 21°C | 23°C | 26°C |
| September | 19°C | 22°C | 24°C |
| October | 12°C | 16°C | 19°C |
| November | 4°C | 8°C | 12°C |
| December | 1°C | 4°C | 7°C |
Merrymeeting Lake: Water Temperature by Location
Merrymeeting Lake: Weather Forecast
November 3
November 4
November 5
November 6
November 7
Location & Local Information
Merrymeeting Lake in New Hampshire experiences typical New England seasonal swings in water temperature. In spring the surface usually warms from roughly 40–60°F (4–16°C) as ice melts and the sun strengthens, while summer brings the warmest conditions with surface readings most commonly in the 65–75°F (18–24°C) range and occasionally reaching the upper 70s°F (25–26°C) in shallow, sheltered areas on hot afternoons. By early fall temperatures decline back toward 50–60°F (10–16°C) as cooling and turnover occur. In winter the lake often develops ice and surface temperatures are near freezing, about 32°F (0°C), with subsurface water remaining only a few degrees above freezing beneath the ice.
Swimming in Merrymeeting Lake is generally possible where public access or private shoreline permission exists, and many people swim during the warmer months when surface temperatures are most comfortable. Local rules, water-quality advisories, and safety conditions such as depth changes, aquatic vegetation, boat traffic, and weather should be checked before entering the water. Winter swimming is uncommon and hazardous because of ice and near‑freezing water, so it is not recommended except in supervised, controlled situations with appropriate precautions.