Pishkun Reservoir — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Pishkun Reservoir, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Pishkun Reservoir today is 19.5°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 |
|---|---|---|---|
| AUG 24 | 21.7°C | 20.0°C | |
| AUG 25 | 21.4°C | 20.0°C | |
| AUG 26 | 21.5°C | 20.0°C | |
| AUG 27 | 21.3°C | 20.0°C | |
| AUG 28 | 21.0°C | 20.0°C | |
| AUG 29 | 20.7°C | 20.0°C | |
| AUG 30 | 20.8°C | 20.0°C | |
| AUG 31 | 19.8°C | 20.0°C | |
| SEP 1 | 16.5°C | 19.4°C | |
| SEP 2 | 16.5°C | 19.2°C | |
| SEP 3 | 16.5°C | 19.1°C | |
| SEP 4 | 16.5°C | 18.9°C | |
| SEP 5 | 16.5°C | 18.8°C | |
| SEP 6 | 16.5°C | 18.6°C | |
| SEP 7 | 16.5°C | 18.5°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 | 4°C | 6°C |
| February | 0°C | 4°C | 7°C |
| March | 1°C | 5°C | 9°C |
| April | 0°C | 4°C | 9°C |
| May | 4°C | 9°C | 15°C |
| June | 9°C | 15°C | 20°C |
| July | 15°C | 19°C | 24°C |
| August | 17°C | 20°C | 23°C |
| September | 13°C | 17°C | 20°C |
| October | 4°C | 10°C | 16°C |
| November | 2°C | 7°C | 10°C |
| December | 1°C | 5°C | 7°C |
Pishkun Reservoir: Water Temperature by Location
Pishkun Reservoir: Weather Forecast
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Location & Local Information
Pishkun Reservoir, like many small Montana impoundments, shows marked seasonal shifts in surface temperature. In spring the water is cool, often around 40–60°F (4–15°C) as snowmelt and cold runoff dominate. By early to mid‑summer surface temperatures commonly rise into the mid‑60s to mid‑70s°F (about 18–24°C) in sheltered, shallow bays on warm, sunny days, while deeper or wind‑exposed parts remain several degrees colder. Late summer can produce the warmest readings locally, occasionally approaching the upper 70s°F (around 25°C) in very shallow water. In autumn temperatures fall back toward the 40s–50s°F (5–15°C), and winter brings near‑freezing surface water (32–39°F, 0–4°C) with ice formation likely depending on severity of the season.
Swimming at Pishkun Reservoir is possible where public access and shore conditions allow, and many visitors swim during the warmest weeks of July and August. Whether it is officially permitted depends on land ownership, signage, and local regulations; some reservoirs restrict swimming because of irrigation infrastructure, water quality concerns, or safety hazards such as sudden drop‑offs and lack of lifeguards. Water temperature, currents from inflows or releases, and seasonal algal conditions are the main factors to consider before entering the water.