John Redmond Reservoir — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in John Redmond Reservoir, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in John Redmond Reservoir today is 29.1°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
✅ As of today, the minimum water temperature is above 82°F (28°C). This is very warm water, which may feel almost hot to most people. Swimming in such conditions is perfect for those seeking relaxation and comfort in the water. These waters are often preferred for relaxation in hot weather, as the water temperature does not cool the body significantly. However, it is important to remember that in such warm waters, caution is necessary, as prolonged exposure without rest can lead to overheating. 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 | 29.7°C | 26.6°C | |
| AUG 5 | 30.0°C | 26.6°C | |
| AUG 6 | 29.9°C | 26.6°C | |
| AUG 7 | 30.0°C | 26.6°C | |
| AUG 8 | 30.0°C | 26.6°C | |
| AUG 9 | 30.0°C | 26.6°C | |
| AUG 10 | 29.0°C | 26.6°C | |
| AUG 11 | 29.1°C | 26.6°C | |
| AUG 12 | 26.6°C | 29.0°C | |
| AUG 13 | 26.6°C | 28.9°C | |
| AUG 14 | 26.6°C | 28.7°C | |
| AUG 15 | 26.6°C | 28.6°C | |
| AUG 16 | 26.6°C | 28.5°C | |
| AUG 17 | 26.6°C | 28.4°C | |
| AUG 18 | 26.6°C | 28.2°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 | 7°C |
| February | 0°C | 4°C | 8°C |
| March | 1°C | 8°C | 15°C |
| April | 9°C | 14°C | 19°C |
| May | 13°C | 18°C | 23°C |
| June | 18°C | 21°C | 25°C |
| July | 24°C | 28°C | 31°C |
| August | 23°C | 27°C | 31°C |
| September | 19°C | 23°C | 26°C |
| October | 16°C | 19°C | 22°C |
| November | 8°C | 12°C | 16°C |
| December | 3°C | 6°C | 9°C |
John Redmond Reservoir: Water Temperature by Location
John Redmond Reservoir: Weather Forecast
August 12
August 13
August 14
August 15
August 16
Location & Local Information
John Redmond Reservoir’s surface water temperatures change substantially through the year. In spring (March–May) surface readings typically range from about 45–65°F (7–18°C) as the lake warms after winter. By summer (June–August) the upper layers commonly reach 70–85°F (21–29°C), and during hot spells can edge higher at the surface. Fall (September–November) sees a gradual cooling to roughly 55–70°F (13–21°C) before winter, when surface temperatures often fall to about 33–45°F (1–7°C). These are typical surface values; deeper water remains colder year-round and temperature can vary with weather, wind and reservoir operations.
Swimming is generally permitted at John Redmond for recreational use, but usually only in designated or commonly used shoreline areas and typically at the swimmer’s own risk, because official lifeguards are not routinely provided. Authorities can close parts of the reservoir or post advisories for safety reasons such as strong currents, fluctuating water levels, debris, poor visibility, or water-quality issues including elevated bacteria or blue‑green algal blooms. Because of the seasonal temperature swings, summer offers the most comfortable swimming conditions, spring and fall can be brisk, and winter swimming poses hypothermia risks. Visitors should check current advisories and exercise caution.