Jordanelle Reservoir — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Jordanelle Reservoir, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Jordanelle Reservoir today is 19.7°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 |
|---|---|---|---|
| JUN 10 | 17.7°C | 17.0°C | |
| JUN 11 | 19.0°C | 17.0°C | |
| JUN 12 | 18.9°C | 17.0°C | |
| JUN 13 | 18.7°C | 17.0°C | |
| JUN 14 | 18.7°C | 17.0°C | |
| JUN 15 | 18.8°C | 17.0°C | |
| JUN 16 | 19.2°C | 17.0°C | |
| JUN 17 | 19.6°C | 17.0°C | |
| JUN 18 | 17.0°C | 19.6°C | |
| JUN 19 | 17.0°C | 19.4°C | |
| JUN 20 | 17.0°C | 19.3°C | |
| JUN 21 | 17.0°C | 19.2°C | |
| JUN 22 | 17.0°C | 19.0°C | |
| JUN 23 | 17.0°C | 18.9°C | |
| JUN 24 | 17.0°C | 18.8°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 | 6°C | 11°C |
| April | 0°C | 6°C | 11°C |
| May | 5°C | 12°C | 19°C |
| June | 13°C | 17°C | 21°C |
| July | 19°C | 21°C | 24°C |
| August | 19°C | 22°C | 24°C |
| September | 15°C | 18°C | 21°C |
| October | 8°C | 13°C | 17°C |
| November | 3°C | 7°C | 11°C |
| December | 1°C | 3°C | 6°C |
Jordanelle Reservoir: Water Temperature by Location
Jordanelle Reservoir: Weather Forecast
June 18
June 19
June 20
June 21
June 22
Location & Local Information
Jordanelle Reservoir is a high-elevation, mountain-fed body of water, so its temperatures stay relatively cool compared with lower-elevation lakes. Typical surface temperatures vary by season: in spring (April–May) the surface often ranges from about 40–55°F (4–13°C) as snowmelt and runoff dominate; in summer (June–August) surface readings commonly reach roughly 60–75°F (15–24°C) on warm afternoons; in fall (September–October) temperatures generally fall back to around 45–60°F (7–16°C); and in winter the surface can approach freezing, roughly 32–39°F (0–4°C), with ice formation possible in cold spells. Deeper water stays markedly colder year-round, and sudden weather changes can drop surface temperatures quickly.
Swimming is permitted in areas of Jordanelle State Park and the reservoir is used for recreational swimming during the warmer months because the park is managed for multiple forms of water recreation. That said, swimmers should be aware of the lake’s cool temperatures, variable water levels, boat traffic, and possible drop-offs, all of which affect safety. Cold water can increase the risk of hypothermia even in summer, and many areas do not have lifeguards, so users are advised to swim in designated zones, use flotation if appropriate, and exercise caution.