Seboeis Lake — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Seboeis Lake, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Seboeis Lake today is 17.3°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
⚠️ As of today, the minimum water temperature ranges from 60°F (15°C) to 65°F (18°C). The water is comfortable for most people, making it an ideal range for water sports enthusiasts. The temperature does not cause significant discomfort, and swimming will be pleasant for the majority. However, it's important to remember that prolonged exposure to the water can still lead to cooling, so it's essential to monitor the time spent in the water, especially for children or elderly people. 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 |
|---|---|---|---|
| SEP 14 | 18.6°C | 21.5°C | |
| SEP 15 | 18.6°C | 21.5°C | |
| SEP 16 | 18.0°C | 21.5°C | |
| SEP 17 | 17.4°C | 21.5°C | |
| SEP 18 | 17.8°C | 21.5°C | |
| SEP 19 | 17.8°C | 21.5°C | |
| SEP 20 | 16.9°C | 21.5°C | |
| SEP 21 | 17.3°C | 21.5°C | |
| SEP 22 | 21.5°C | 17.5°C | |
| SEP 23 | 21.5°C | 17.7°C | |
| SEP 24 | 21.5°C | 17.9°C | |
| SEP 25 | 21.5°C | 18.1°C | |
| SEP 26 | 21.5°C | 18.4°C | |
| SEP 27 | 21.5°C | 18.6°C | |
| SEP 28 | 21.5°C | 18.8°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 | 6°C | 9°C |
| March | 1°C | 4°C | 6°C |
| April | 0°C | 3°C | 7°C |
| May | 4°C | 8°C | 12°C |
| June | 10°C | 14°C | 17°C |
| July | 17°C | 22°C | 27°C |
| August | 21°C | 24°C | 27°C |
| September | 18°C | 22°C | 25°C |
| October | 11°C | 15°C | 19°C |
| November | 4°C | 11°C | 16°C |
| December | 3°C | 6°C | 9°C |
Seboeis Lake: Water Temperature by Location
Seboeis Lake: Weather Forecast
September 22
September 23
September 24
September 25
Location & Local Information
Seboeis Lake in northern Maine experiences the kind of seasonal temperature swings common to inland Maine waters. From spring melt through late May, surface temperatures typically run about 40–55°F (4–13°C) as the lake warms slowly. In summer, surface warming usually brings the best swimming conditions, with typical surface readings of roughly 60–75°F (15–24°C) on warm days; colder years or cloudy periods may keep it nearer the low end of that band. By fall the surface cools again to about 45–60°F (7–16°C) as air temperatures drop, and in winter the lake is at or near freezing, often 28–34°F (-2–1°C) beneath ice and slush. Deeper water remains noticeably colder year-round because of stratification and a thermocline that can produce much lower temperatures below a few meters.
Swimming at Seboeis Lake is generally permitted and popular from late June through August when surface temperatures are mildest, but there are few developed beaches or lifeguarded areas. The lake’s remoteness and variable temperatures mean swimmers should exercise caution: cold shock and rapid hypothermia are risks even on warm days if venturing into deeper or shaded water. Visitors should use common-sense safety—swim with companions, wear flotation if needed, and observe local signage or advisories about water quality or access.