Annabessacook Lake — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Annabessacook Lake, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Annabessacook Lake today is 23.7°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
✅ As of today, the minimum water temperature ranges from 75°F (23°C) to 79°F (26°C). This is a very comfortable temperature for swimming, and many people can enjoy prolonged stays in the water without feeling cold. The water is pleasantly warm, making it ideal for relaxation and water sports. This temperature range is particularly popular among tourists, as it combines comfort and safety for health. 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 |
|---|---|---|---|
| AUG 4 | 26.7°C | 25.5°C | |
| AUG 5 | 26.7°C | 25.5°C | |
| AUG 6 | 26.9°C | 25.5°C | |
| AUG 7 | 23.9°C | 25.5°C | |
| AUG 8 | 23.9°C | 25.5°C | |
| AUG 9 | 23.9°C | 25.5°C | |
| AUG 10 | 23.7°C | 25.5°C | |
| AUG 11 | 23.7°C | 25.5°C | |
| AUG 12 | 25.5°C | 23.8°C | |
| AUG 13 | 25.5°C | 23.9°C | |
| AUG 14 | 25.5°C | 24.0°C | |
| AUG 15 | 25.5°C | 24.1°C | |
| AUG 16 | 25.5°C | 24.2°C | |
| AUG 17 | 25.5°C | 24.2°C | |
| AUG 18 | 25.5°C | 24.3°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 | 1°C | 4°C |
| February | 0°C | 1°C | 3°C |
| March | 0°C | 1°C | 3°C |
| April | 0°C | 4°C | 8°C |
| May | 6°C | 11°C | 15°C |
| June | 11°C | 16°C | 20°C |
| July | 20°C | 24°C | 27°C |
| August | 22°C | 26°C | 29°C |
| September | 20°C | 23°C | 25°C |
| October | 13°C | 17°C | 21°C |
| November | 0°C | 7°C | 14°C |
| December | 0°C | 1°C | 4°C |
Annabessacook Lake: Water Temperature by Location
Annabessacook Lake: Weather Forecast
August 12
August 13
August 14
August 15
August 16
Location & Local Information
Annabessacook Lake in Maine experiences a wide annual range of water temperatures. In winter the surface is typically at or just above freezing, around 32°F (0°C) under ice, while deeper water remains near 39–40°F (4–5°C). During spring the lake warms into the 40s and lower 50s°F (4–12°C) as ice-out progresses. In summer the warm surface layer commonly reaches roughly 65–80°F (18–27°C) on typical warm days, with the warmest late‑July and August afternoons occasionally pushing toward the upper end of that range; by fall temperatures decline back into the 40s–50s°F (7–15°C) as cooling and turnover occur.
Swimming is generally a permitted and popular recreational activity where public access points or beaches exist, because the lake is used for boating and shore recreation. However, local rules, private shoreline ownership, and occasional water‑quality advisories can restrict or recommend avoiding swimming; for example, cyanobacterial (blue‑green algae) blooms or bacterial contamination can lead to temporary advisories. Even when open for swimming, users should be mindful of seasonal conditions: cold spring and fall water temperatures increase risk of cold shock, and deeper, unstratified water remains much colder than the warm surface layer.