Big Stone Lake — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Big Stone Lake, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Big Stone Lake today is 17.7°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 | 20.5°C | 22.0°C | |
| SEP 15 | 19.7°C | 22.0°C | |
| SEP 16 | 19.9°C | 22.0°C | |
| SEP 17 | 18.1°C | 22.0°C | |
| SEP 18 | 17.6°C | 22.0°C | |
| SEP 19 | 18.0°C | 22.0°C | |
| SEP 20 | 17.8°C | 22.0°C | |
| SEP 21 | 17.7°C | 22.0°C | |
| SEP 22 | 22.0°C | 17.9°C | |
| SEP 23 | 22.0°C | 18.1°C | |
| SEP 24 | 22.0°C | 18.3°C | |
| SEP 25 | 22.0°C | 18.6°C | |
| SEP 26 | 22.0°C | 18.8°C | |
| SEP 27 | 22.0°C | 19.0°C | |
| SEP 28 | 22.0°C | 19.2°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 | 1°C | 7°C | 12°C |
| February | 1°C | 8°C | 15°C |
| March | 1°C | 9°C | 17°C |
| April | 2°C | 11°C | 20°C |
| May | 8°C | 15°C | 22°C |
| June | 15°C | 20°C | 24°C |
| July | 17°C | 23°C | 29°C |
| August | 20°C | 24°C | 28°C |
| September | 17°C | 22°C | 27°C |
| October | 5°C | 12°C | 18°C |
| November | 3°C | 7°C | 10°C |
| December | 2°C | 7°C | 11°C |
Big Stone Lake: Water Temperature by Location
Big Stone Lake: Weather Forecast
September 22
September 23
September 24
September 25
Location & Local Information
Big Stone Lake’s surface water temperatures vary widely through the year. In summer the lake commonly warms to the mid-60s to high-70s °F (about 18–26 °C) at the surface, which is the most comfortable range for swimming. During spring the water is much cooler, often ranging from the low 40s to around 60 °F (4–15 °C) as ice melts and the lake stratifies. In autumn temperatures drop back into the 40s and 50s °F (4–15 °C) as air temperatures cool. In winter the lake typically reaches freezing conditions at or near 32 °F (0 °C) and often has ice cover, so liquid-water temperatures are not suitable for swimming.
Swimming is generally allowed in areas of Big Stone Lake where public access and beaches exist, and many people swim there in summer months when surface temperatures are warmest. Local authorities may post advisories or close swim areas from time to time for safety or water-quality reasons, such as bacterial contamination or algal blooms, so it’s wise to check current conditions before entering the water. Even in summer, lake swimmers should be mindful of boat traffic, sudden depth changes and the risk of cold-water shock in cooler pockets.