Blackfoot Reservoir — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Blackfoot Reservoir, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Blackfoot Reservoir today is 22.6°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
✅ As of today, the minimum water temperature ranges from 68°F (20°C) to 74°F (23°C). The water is warm and pleasant for swimming, and in this range, one can stay in the water for extended periods without the risk of hypothermia. This is the ideal temperature for relaxation, swimming, and water sports. Families with children, as well as outdoor enthusiasts, will enjoy swimming and time spent in the water. For most people, this is the optimal temperature for a comfortable beach experience. 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 24 | 23.0°C | 22.1°C | |
| AUG 25 | 22.9°C | 22.1°C | |
| AUG 26 | 22.9°C | 22.1°C | |
| AUG 27 | 22.3°C | 22.1°C | |
| AUG 28 | 22.3°C | 22.1°C | |
| AUG 29 | 22.4°C | 22.1°C | |
| AUG 30 | 23.0°C | 22.1°C | |
| AUG 31 | 22.7°C | 22.1°C | |
| SEP 1 | 18.5°C | 22.4°C | |
| SEP 2 | 18.5°C | 22.2°C | |
| SEP 3 | 18.5°C | 22.0°C | |
| SEP 4 | 18.5°C | 21.8°C | |
| SEP 5 | 18.5°C | 21.6°C | |
| SEP 6 | 18.5°C | 21.4°C | |
| SEP 7 | 18.5°C | 21.2°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 | 2°C | 5°C |
| February | 1°C | 4°C | 6°C |
| March | 1°C | 5°C | 9°C |
| April | 0°C | 5°C | 10°C |
| May | 5°C | 11°C | 17°C |
| June | 13°C | 16°C | 20°C |
| July | 16°C | 20°C | 25°C |
| August | 19°C | 22°C | 26°C |
| September | 15°C | 19°C | 22°C |
| October | 8°C | 12°C | 16°C |
| November | 3°C | 6°C | 9°C |
| December | 1°C | 3°C | 6°C |
Blackfoot Reservoir: Water Temperature by Location
Blackfoot Reservoir: Weather Forecast
September 1
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September 3
September 4
September 5
September 6
Location & Local Information
Blackfoot Reservoir is fed by mountain runoff and sits at a modest alpine elevation, so its water temperatures swing with the seasons and remain cooler than lowland lakes. In spring, as snowmelt fills the basin, surface temperatures typically run from about 34–55°F (1–13°C). By summer, sunny days can warm the surface to roughly 60–72°F (16–22°C) on warm afternoons, though deeper water stays much colder. Early fall sees cooling back toward 50–60°F (10–15°C) and by late fall and winter the reservoir can approach freezing and develop ice cover in many years. These are general ranges; daily weather, depth, and inflow volume cause local variation.
Swimming is generally possible and commonly practiced in summer when surface temperatures are most comfortable, but it is not without hazards. The reservoir is usually unmanaged for lifeguards, and cold water at depth increases the risk of cold-water shock and rapid loss of body heat, so brief swims, use of a companion or flotation device, and caution are advisable. Seasonal access or local rules may restrict swimming in some areas for safety or water-quality reasons, so checking current conditions before entering the water is wise.