Lake Minnewanka — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Lake Minnewanka, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Lake Minnewanka today is 10.4°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
❌ As of today, the minimum water temperature ranges from 50°F (10°C) to 54°F (12°C). The water is slightly warmer, but still cool for most people. Swimming in such conditions is possible, but for most people, the time spent in the water should be limited to avoid hypothermia. Even experienced swimmers may feel discomfort if they stay in the water for too long. To improve comfort and safety, a wetsuit can be used. 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 | 12.0°C | 16.0°C | |
| SEP 15 | 11.8°C | 16.0°C | |
| SEP 16 | 11.8°C | 16.0°C | |
| SEP 17 | 11.0°C | 16.0°C | |
| SEP 18 | 10.8°C | 16.0°C | |
| SEP 19 | 10.7°C | 16.0°C | |
| SEP 20 | 10.5°C | 16.0°C | |
| SEP 22 | 16.0°C | 10.7°C | |
| SEP 23 | 16.0°C | 11.0°C | |
| SEP 24 | 16.0°C | 11.2°C | |
| SEP 25 | 16.0°C | 11.5°C | |
| SEP 26 | 16.0°C | 11.8°C | |
| SEP 27 | 16.0°C | 12.1°C | |
| SEP 28 | 16.0°C | 12.4°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 | 3°C | 4°C |
| February | 0°C | 3°C | 4°C |
| March | 0°C | 3°C | 5°C |
| April | 0°C | 5°C | 11°C |
| May | 4°C | 8°C | 15°C |
| June | 7°C | 14°C | 18°C |
| July | 10°C | 17°C | 23°C |
| August | 11°C | 18°C | 24°C |
| September | 11°C | 16°C | 20°C |
| October | 7°C | 12°C | 16°C |
| November | 0°C | 6°C | 11°C |
| December | 0°C | 3°C | 6°C |
Lake Minnewanka: Water Temperature by Location
Lake Minnewanka: Weather Forecast
September 22
September 23
September 24
September 25
September 26
Location & Local Information
Lake Minnewanka, located in Banff National Park, is a large, deep, glacial-fed reservoir, which dictates its perpetually cold water temperatures. Throughout the year, the water remains extremely frigid. Even in the peak summer months, the water temperature rarely rises above 10∘C (50∘F), and is often much colder, making it one of the coldest lakes in the park. In the winter, the water is near freezing, typically dropping to the range of 0∘C to 4∘C (32∘F to 39∘F), and the lake is completely frozen over.
Swimming is generally permitted, but Parks Canada and the Lake Minnewanka cruise operators strongly caution visitors against it because of the extreme cold. The primary danger is cold shock and rapid hypothermia, which can incapacitate a swimmer in a matter of minutes, regardless of the air temperature. Furthermore, the lake allows motorized boats, which creates additional hazards from wakes and traffic. While you can technically swim, it is entirely at your own risk, and local recommendations often point to the slightly warmer, shallow Johnson Lake nearby for a safer experience.