Great East Lake — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Great East Lake, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Great East Lake today is 20.7°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 | 19.9°C | 17.6°C | |
| JUN 24 | 20.0°C | 17.6°C | |
| JUN 25 | 20.1°C | 17.6°C | |
| JUN 26 | 20.1°C | 17.6°C | |
| JUN 27 | 20.2°C | 17.6°C | |
| JUN 28 | 20.3°C | 17.6°C | |
| JUN 29 | 20.3°C | 17.6°C | |
| JUN 30 | 20.3°C | 17.6°C | |
| JUL 1 | 25.0°C | 20.9°C | |
| JUL 2 | 25.0°C | 21.1°C | |
| JUL 3 | 25.0°C | 21.3°C | |
| JUL 4 | 25.0°C | 21.6°C | |
| JUL 5 | 25.0°C | 21.8°C | |
| JUL 6 | 25.0°C | 22.0°C | |
| JUL 7 | 25.0°C | 22.2°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 | 9°C | 15°C |
| February | 4°C | 9°C | 13°C |
| March | 7°C | 11°C | 14°C |
| April | 4°C | 10°C | 16°C |
| May | 8°C | 14°C | 19°C |
| June | 15°C | 18°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 | 14°C | 16°C | 19°C |
| November | 6°C | 10°C | 14°C |
| December | 3°C | 6°C | 9°C |
Great East Lake: Water Temperature by Location
Great East Lake: Weather Forecast
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July 2
July 3
July 4
July 5
July 6
Location & Local Information
Great East Lake’s surface temperatures follow the typical seasonal pattern for lakes in southern Maine. In spring the water is cold, often ranging from the low 40s to the mid‑50s °F (about 4–13 °C) as the lake comes out of ice cover. By summer, surface temperatures commonly rise into the mid‑60s to mid‑70s °F (18–24 °C) and on hot, calm days can approach the upper 70s or low 80s °F (25–27 °C). In early fall the lake cools back through the 60s to the 50s °F (15–10 °C) and by late fall and winter the surface is near freezing, around 32 °F (0 °C), with ice formation that keeps open water temperatures at or below the mid‑30s °F (1–3 °C) where ice remains.
Swimming in Great East Lake is generally possible and commonly undertaken during the warm months where shoreline or beach access exists, because summer surface temperatures become comfortable for recreational use. In contrast, winter swimming is not advisable and often not feasible because of ice cover, near‑freezing water and the risk of cold‑water shock and hypothermia. Local access rules, posted advisories and water‑quality notices should be observed, and swimmers should consider factors such as wind, weather and the presence or absence of lifeguards or designated swimming areas before entering the water.