Big Eau Pleine Reservoir — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Big Eau Pleine Reservoir, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Big Eau Pleine Reservoir today is 17.9°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 | 19.1°C | 18.2°C | |
| SEP 15 | 18.9°C | 18.2°C | |
| SEP 16 | 18.9°C | 18.2°C | |
| SEP 17 | 18.7°C | 18.2°C | |
| SEP 18 | 18.5°C | 18.2°C | |
| SEP 19 | 18.4°C | 18.2°C | |
| SEP 20 | 18.7°C | 18.2°C | |
| SEP 21 | 17.9°C | 18.2°C | |
| SEP 22 | 18.2°C | 17.9°C | |
| SEP 23 | 18.2°C | 17.9°C | |
| SEP 24 | 18.2°C | 17.9°C | |
| SEP 25 | 18.2°C | 18.0°C | |
| SEP 26 | 18.2°C | 18.0°C | |
| SEP 27 | 18.2°C | 18.0°C | |
| SEP 28 | 18.2°C | 18.0°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 | 3°C |
| February | 0°C | 2°C | 4°C |
| March | 0°C | 2°C | 5°C |
| April | 1°C | 8°C | 15°C |
| May | 7°C | 14°C | 21°C |
| June | 15°C | 18°C | 22°C |
| July | 19°C | 23°C | 28°C |
| August | 19°C | 25°C | 30°C |
| September | 14°C | 18°C | 23°C |
| October | 9°C | 14°C | 18°C |
| November | 4°C | 9°C | 13°C |
| December | 0°C | 2°C | 5°C |
Big Eau Pleine Reservoir: Water Temperature by Location
Big Eau Pleine Reservoir: Weather Forecast
September 22
September 23
September 24
September 25
Location & Local Information
The Big Eau Pleine Reservoir experiences a wide range of water temperatures through the year because it is a mid-latitude, impounded lake with variable depth and seasonal heating. In spring the surface water typically runs from about 40–60°F (4–16°C) as the lake warms after ice-out. By summer, surface temperatures often rise into the 68–80°F (20–27°C) range on warm, sunny afternoons, though cooler pockets persist below the thermocline and in shaded coves. Early fall sees a gradual cooling to roughly 50–65°F (10–18°C) before turnover, while winter brings ice cover and near-freezing conditions around 32°F (0°C) or colder under the ice.
Swimming in the Big Eau Pleine Reservoir is generally permitted in public access areas and at designated recreation spots because the reservoir is managed for multiple recreational uses, including boating, fishing and swimming. That said, there are no widespread lifeguards, and safety is affected by boat traffic, sudden depth changes, submerged structure, and the colder temperatures below the surface, so swimmers should choose marked areas, be aware of changing conditions, and follow posted local regulations. Seasonal temperature variations and wind-driven waves also influence the comfort and safety of swimming, making summer the most suitable time for most people.