Lake Francis — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Lake Francis, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Lake Francis today is 22.9°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 |
|---|---|---|---|
| JUL 14 | 22.2°C | 21.5°C | |
| JUL 15 | 24.2°C | 21.5°C | |
| JUL 16 | 24.1°C | 21.5°C | |
| JUL 17 | 24.2°C | 21.5°C | |
| JUL 18 | 23.3°C | 21.5°C | |
| JUL 19 | 23.2°C | 21.5°C | |
| JUL 20 | 23.1°C | 21.5°C | |
| JUL 21 | 22.8°C | 21.5°C | |
| JUL 22 | 21.5°C | 22.8°C | |
| JUL 23 | 21.5°C | 22.8°C | |
| JUL 24 | 21.5°C | 22.7°C | |
| JUL 25 | 21.5°C | 22.6°C | |
| JUL 26 | 21.5°C | 22.6°C | |
| JUL 27 | 21.5°C | 22.5°C | |
| JUL 28 | 21.5°C | 22.4°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 | 3°C | 5°C |
| February | 0°C | 2°C | 5°C |
| March | 0°C | 2°C | 4°C |
| April | 0°C | 3°C | 7°C |
| May | 3°C | 7°C | 12°C |
| June | 10°C | 14°C | 18°C |
| July | 16°C | 22°C | 27°C |
| August | 18°C | 21°C | 24°C |
| September | 16°C | 21°C | 25°C |
| October | 8°C | 13°C | 17°C |
| November | 2°C | 5°C | 8°C |
| December | 1°C | 4°C | 6°C |
Lake Francis: Water Temperature by Location
Lake Francis: Weather Forecast
July 22
July 23
July 24
July 25
Location & Local Information
Lake Francis, a reservoir in northern New Hampshire, tends to run cooler than more southerly lakes because of its latitude, depth and river-fed character. Surface temperatures typically climb into the 60s to low 70s °F in the warmest weeks of summer (about 16–22 °C), while deeper water remains substantially cooler, often in the mid‑40s to mid‑50s °F (7–13 °C) even on hot days. Spring and early summer bring a gradual rise from chilly conditions—roughly 35–55 °F (2–13 °C)—and by fall the surface cools back toward the 50s °F (10–15 °C). In winter the lake commonly freezes and surface temperatures sit at or near 32 °F (0 °C) under ice.
Recreational swimming is possible at Lake Francis, but conditions and facilities are limited. There are areas where people enter the water from shore or boats, yet there are few if any staffed beaches or lifeguards, and the cold water and sudden temperature changes present real risks such as cold shock and hypothermia. Boat traffic, currents near the dam and variable depths also affect safety. Because of these factors, most swimmers choose calm, sheltered spots in summer and take precautions—short exposure times, a buddy system and a wetsuit if venturing into cooler or deeper water.