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 14.6°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
⚠️ As of today, the minimum water temperature ranges from 54°F (12°C) to 60°F (15°C). The water is significantly warmer, and swimming becomes possible for most people. However, caution may still be required for prolonged stays in the water, as extended exposure can cause discomfort. This is a suitable temperature range for short swims and for those accustomed to cooler water. For more comfortable swimming, it is recommended to use proper gear. 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 |
|---|---|---|---|
| AUG 4 | 16.4°C | 19.1°C | |
| AUG 5 | 16.4°C | 19.1°C | |
| AUG 6 | 16.3°C | 19.1°C | |
| AUG 7 | 16.3°C | 19.1°C | |
| AUG 8 | 15.6°C | 19.1°C | |
| AUG 9 | 15.5°C | 19.1°C | |
| AUG 10 | 15.5°C | 19.1°C | |
| AUG 11 | 14.6°C | 19.1°C | |
| AUG 12 | 19.1°C | 14.8°C | |
| AUG 13 | 19.1°C | 15.1°C | |
| AUG 14 | 19.1°C | 15.3°C | |
| AUG 15 | 19.1°C | 15.5°C | |
| AUG 16 | 19.1°C | 15.7°C | |
| AUG 17 | 19.1°C | 16.0°C | |
| AUG 18 | 19.1°C | 16.2°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 | 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 | 14°C | 19°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
August 12
August 13
August 14
August 15
August 16
August 17
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.