Sebago Lake — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Sebago Lake, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Sebago Lake today is 20.3°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 6 | 15.2°C | 20.7°C | |
| JUN 7 | 19.0°C | 20.7°C | |
| JUN 8 | 19.3°C | 20.7°C | |
| JUN 10 | 19.9°C | 20.7°C | |
| JUN 11 | 20.0°C | 20.7°C | |
| JUN 12 | 20.1°C | 20.7°C | |
| JUN 13 | 20.3°C | 20.7°C | |
| JUN 14 | 20.7°C | 20.3°C | |
| JUN 15 | 20.7°C | 20.3°C | |
| JUN 16 | 20.7°C | 20.4°C | |
| JUN 17 | 20.7°C | 20.4°C | |
| JUN 18 | 20.7°C | 20.4°C | |
| JUN 19 | 20.7°C | 20.4°C | |
| JUN 20 | 20.7°C | 20.4°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 | 3°C | 8°C | 12°C |
| February | 3°C | 7°C | 10°C |
| March | 2°C | 6°C | 9°C |
| April | 2°C | 6°C | 9°C |
| May | 6°C | 17°C | 28°C |
| June | 13°C | 21°C | 28°C |
| July | 18°C | 23°C | 28°C |
| August | 21°C | 25°C | 28°C |
| September | 20°C | 24°C | 28°C |
| October | 14°C | 18°C | 21°C |
| November | 6°C | 11°C | 15°C |
| December | 3°C | 9°C | 13°C |
Sebago Lake: Water Temperature by Location
Sebago Lake: Weather Forecast
June 13
June 14
June 15
June 16
June 17
Location & Local Information
Sebago Lake in Maine is a large, deep lake that cools and warms unevenly through the year. Surface temperatures in summer typically run about 60–75°F (15–24°C) on warm days, while the thermocline and deeper water often remain much colder, frequently in the 40s°F (4–9°C) even in July and August. In spring the lake commonly ranges from roughly 35–55°F (2–13°C) as it stratifies, and by autumn surface readings drop back into the 40s–60°F (4–16°C) as cooling begins. In winter the lake approaches freezing where ice forms; surface temperatures hover near 32°F (0°C) under ice cover.
Swimming is permitted at public and managed beaches around Sebago Lake, including areas in state and municipal parks where lifeguards and designated swim zones may be provided during peak season. Recreational swimming is allowed because water quality is generally suitable and local authorities manage access and safety, but the lake also serves as a regional water supply and therefore has rules and restrictions to protect drinking water. Swimmers should be mindful of cold-water hazards, sudden temperature changes with depth, and seasonal ice conditions that make winter swimming unsafe for most people.