Dworshak Reservoir — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Dworshak Reservoir, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Dworshak Reservoir today is 17.5°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
⚠️ As of today, the minimum water temperature ranges from 60°F (15°C) to 65°F (18°C). The water is comfortable for most people, making it an ideal range for water sports enthusiasts. The temperature does not cause significant discomfort, and swimming will be pleasant for the majority. However, it's important to remember that prolonged exposure to the water can still lead to cooling, so it's essential to monitor the time spent in the water, especially for children or elderly people. 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 |
|---|---|---|---|
| JUN 6 | 16.9°C | 19.0°C | |
| JUN 7 | 18.8°C | 19.0°C | |
| JUN 8 | 18.1°C | 19.0°C | |
| JUN 10 | 17.6°C | 19.0°C | |
| JUN 11 | 17.4°C | 19.0°C | |
| JUN 12 | 17.4°C | 19.0°C | |
| JUN 13 | 17.5°C | 19.0°C | |
| JUN 14 | 19.0°C | 17.6°C | |
| JUN 15 | 19.0°C | 17.7°C | |
| JUN 16 | 19.0°C | 17.7°C | |
| JUN 17 | 19.0°C | 17.8°C | |
| JUN 18 | 19.0°C | 17.9°C | |
| JUN 19 | 19.0°C | 18.0°C | |
| JUN 20 | 19.0°C | 18.0°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 | 3°C | 8°C | 12°C |
| February | 3°C | 11°C | 19°C |
| March | 5°C | 14°C | 23°C |
| April | 6°C | 12°C | 17°C |
| May | 11°C | 16°C | 21°C |
| June | 14°C | 19°C | 24°C |
| July | 18°C | 22°C | 26°C |
| August | 20°C | 24°C | 27°C |
| September | 18°C | 22°C | 25°C |
| October | 10°C | 15°C | 19°C |
| November | 7°C | 11°C | 13°C |
| December | 5°C | 9°C | 12°C |
Dworshak Reservoir: Water Temperature by Location
Dworshak Reservoir: Weather Forecast
June 14
June 15
June 16
June 17
June 18
Location & Local Information
Dworshak Reservoir is a deep, canyon-style impoundment so surface water stays cooler than many lowland lakes. Seasonal surface temperatures typically run from roughly 40–55°F (4–13°C) in spring, through about 55–70°F (13–21°C) in the warmest part of summer, falling back to roughly 45–60°F (7–16°C) in autumn and approaching near-freezing, 32–40°F (0–4°C), in winter where bays can ice over. Because the reservoir is deep, colder water persists below the surface and thermoclines can cause rapid temperature changes with depth even on warm days.
Swimming at Dworshak is generally permitted, but conditions make it more of a seasonal, cautious activity than a typical beach swim. Cold surface temperatures, steep shorelines, fluctuating water levels, submerged hazards and boat traffic mean hypothermia risk and water-safety concerns are real, so many people who enter the water in spring or fall use wetsuits or limit exposure time. Designated recreation and day-use areas offer better access and safer launch points, but swimmers should always be aware of changing weather, keep clear of boats, and follow posted rules and local guidance for safety.