Willard Bay Reservoir — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Willard Bay Reservoir, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Willard Bay Reservoir today is 20.9°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
✅ As of today, the minimum water temperature ranges from 68°F (20°C) to 74°F (23°C). The water is warm and pleasant for swimming, and in this range, one can stay in the water for extended periods without the risk of hypothermia. This is the ideal temperature for relaxation, swimming, and water sports. Families with children, as well as outdoor enthusiasts, will enjoy swimming and time spent in the water. For most people, this is the optimal temperature for a comfortable beach experience. 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 3 | 19.4°C | 20.5°C | |
| JUN 4 | 20.0°C | 20.5°C | |
| JUN 5 | 20.0°C | 20.5°C | |
| JUN 6 | 20.9°C | 20.5°C | |
| JUN 7 | 21.5°C | 20.5°C | |
| JUN 8 | 21.6°C | 20.5°C | |
| JUN 10 | 20.9°C | 20.5°C | |
| JUN 11 | 20.5°C | 20.9°C | |
| JUN 12 | 20.5°C | 20.9°C | |
| JUN 13 | 20.5°C | 20.8°C | |
| JUN 14 | 20.5°C | 20.8°C | |
| JUN 15 | 20.5°C | 20.8°C | |
| JUN 16 | 20.5°C | 20.8°C | |
| JUN 17 | 20.5°C | 20.8°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 | 3°C | 6°C |
| February | 2°C | 4°C | 7°C |
| March | 4°C | 9°C | 15°C |
| April | 5°C | 10°C | 15°C |
| May | 8°C | 14°C | 21°C |
| June | 15°C | 21°C | 26°C |
| July | 20°C | 22°C | 25°C |
| August | 20°C | 23°C | 26°C |
| September | 17°C | 21°C | 25°C |
| October | 8°C | 14°C | 19°C |
| November | 3°C | 8°C | 12°C |
| December | 0°C | 4°C | 8°C |
Willard Bay Reservoir: Water Temperature by Location
Willard Bay Reservoir: Weather Forecast
June 9
June 10
June 11
June 12
June 13
Location & Local Information
Willard Bay Reservoir typically follows the seasonal pattern of shallow inland reservoirs, with surface water temperatures that rise and fall through the year. In spring the surface often ranges from roughly 40–60°F (4–16°C) as runoff and cool air keep the water chilly. Summer brings the warmest conditions, with surface temperatures commonly between about 65–80°F (18–27°C), although calm, sunny weeks can push the warmest shoal areas a few degrees higher. During fall the surface cools back into the mid-50s to mid-60s°F (10–18°C), and in winter the reservoir can approach near‑freezing at the surface, roughly 32–40°F (0–4°C), depending on ice cover and year-to-year variation. Deeper zones remain colder year-round and local weather, wind, and inflow affect actual temperatures.
Swimming is allowed at Willard Bay State Park in designated beach and day-use areas, which are established for recreational access and safety. Because lifeguards are not always present and because boat traffic, changing temperatures, and occasional algae or debris can affect conditions, swimmers should choose marked swim areas, be cautious of cold-water shock in spring and fall, and follow park rules. Water clarity and temperature can vary, so check current park advisories before entering.