Big Spirit Lake — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Big Spirit Lake, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Big Spirit Lake today is 18.7°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
⚠️ As of today, the minimum water temperature ranges from 65°F (18°C) to 68°F (20°C). This is already quite warm water, which is ideal for most people. Swimming becomes comfortable, and prolonged stays in the water do not cause discomfort. This temperature is perfect for family trips and for those who prefer warmer water. It is also comfortable for water sports such as surfing or swimming. 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 | 20.7°C | 21.6°C | |
| SEP 15 | 20.9°C | 21.6°C | |
| SEP 16 | 20.0°C | 21.6°C | |
| SEP 17 | 20.4°C | 21.6°C | |
| SEP 18 | 19.2°C | 21.6°C | |
| SEP 19 | 18.8°C | 21.6°C | |
| SEP 20 | 18.3°C | 21.6°C | |
| SEP 21 | 18.7°C | 21.6°C | |
| SEP 22 | 21.6°C | 18.8°C | |
| SEP 23 | 21.6°C | 19.0°C | |
| SEP 24 | 21.6°C | 19.1°C | |
| SEP 25 | 21.6°C | 19.3°C | |
| SEP 26 | 21.6°C | 19.4°C | |
| SEP 27 | 21.6°C | 19.6°C | |
| SEP 28 | 21.6°C | 19.7°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 | 2°C | 7°C | 12°C |
| February | 3°C | 9°C | 15°C |
| March | 3°C | 10°C | 17°C |
| April | 5°C | 13°C | 20°C |
| May | 11°C | 16°C | 21°C |
| June | 15°C | 19°C | 22°C |
| July | 17°C | 22°C | 28°C |
| August | 22°C | 25°C | 28°C |
| September | 18°C | 22°C | 26°C |
| October | 5°C | 13°C | 20°C |
| November | 4°C | 7°C | 10°C |
| December | 3°C | 7°C | 11°C |
Big Spirit Lake: Water Temperature by Location
Big Spirit Lake: Weather Forecast
September 21
September 22
September 23
September 24
September 25
Location & Local Information
Big Spirit Lake experiences a wide seasonal swing in water temperature. In winter the lake typically sits at or just above freezing, about 32°F (0°C), and often develops ice cover. During spring the surface warms into the 40s–60s °F (4–16°C) as air temperatures rise and snowmelt feeds the basin. Peak summer surface temperatures commonly range from the low 70s to around 80°F (21–27°C), with occasional warm spells pushing the surface into the low 80s (27–28°C) on hot, calm days. As autumn advances the water cools back through the 50s–60s °F (10–16°C) before refreezing in winter.
Swimming in Big Spirit Lake is generally permitted at designated beaches and public access points, and many visitors swim during the summer when surface temperatures are most comfortable. Local authorities monitor water quality and may post advisories or close beaches temporarily for elevated bacteria or harmful algal blooms, so swimmers should heed posted warnings. Cold water in spring and late fall can cause cold-shock and increases hypothermia risk, making it uncomfortable and unsafe for extended swims until temperatures rise. Lifeguard presence and specific rules vary by site, so checking local beach information before entering the water is recommended.