Hyrum Reservoir — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Hyrum Reservoir, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Hyrum Reservoir today is 14.7°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
⚠️ As of today, the minimum water temperature ranges from 54°F (12°C) to 60°F (15°C). The water is significantly warmer, and swimming becomes possible for most people. However, caution may still be required for prolonged stays in the water, as extended exposure can cause discomfort. This is a suitable temperature range for short swims and for those accustomed to cooler water. For more comfortable swimming, it is recommended to use proper gear. 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 |
|---|---|---|---|
| OCT 5 | 15.0°C | 13.5°C | |
| OCT 6 | 14.0°C | 13.5°C | |
| OCT 7 | 14.6°C | 13.5°C | |
| OCT 8 | 14.6°C | 13.5°C | |
| OCT 9 | 14.5°C | 13.5°C | |
| OCT 10 | 14.3°C | 13.5°C | |
| OCT 11 | 14.2°C | 13.5°C | |
| OCT 12 | 14.8°C | 13.5°C | |
| OCT 13 | 13.5°C | 14.6°C | |
| OCT 14 | 13.5°C | 14.6°C | |
| OCT 15 | 13.5°C | 14.5°C | |
| OCT 16 | 13.5°C | 14.5°C | |
| OCT 17 | 13.5°C | 14.4°C | |
| OCT 18 | 13.5°C | 14.3°C | |
| OCT 19 | 13.5°C | 14.3°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 | 2°C | 4°C | 7°C |
| March | 2°C | 8°C | 14°C |
| April | 4°C | 9°C | 15°C |
| May | 8°C | 14°C | 20°C |
| June | 15°C | 20°C | 24°C |
| July | 20°C | 24°C | 29°C |
| August | 20°C | 25°C | 30°C |
| September | 17°C | 22°C | 28°C |
| October | 8°C | 14°C | 19°C |
| November | 3°C | 7°C | 11°C |
| December | 0°C | 3°C | 6°C |
Hyrum Reservoir: Water Temperature by Location
Hyrum Reservoir: Weather Forecast
October 13
October 14
October 15
October 16
October 17
October 18
Location & Local Information
Hyrum Reservoir, located in northern Utah, tends to run cooler than low-elevation lakes because of its higher altitude and inflow from mountain streams. Typical surface temperatures vary seasonally: in spring the water is often around 40–60°F (4–16°C) as snowmelt and cool inflows dominate; summer brings the warmest conditions, commonly about 60–75°F (15–24°C) at the surface on warm days; fall sees a steady decline to roughly 45–65°F (7–18°C); and in winter the surface can hover near freezing, about 32–36°F (0–2°C), with ice forming in cold spells. These ranges are approximate and will vary with weather, wind, depth, and recent runoff.
Swimming is permitted at Hyrum Reservoir as part of its recreational use, especially during the warmer months when surface temperatures are more comfortable. Park rules and posted signs govern where and when swimming is allowed, and visitors should be mindful of hazards: the water can remain chilly even in summer below the surface, increasing the risk of cold-water shock and hypothermia, and winter ice eliminates safe swimming entirely. As always, swimmers should follow local regulations, use caution around boat traffic, and check current conditions before entering the water.