Gunlock Reservoir — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Gunlock Reservoir, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Gunlock Reservoir today is 19.5°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 |
|---|---|---|---|
| OCT 5 | 20.1°C | 18.5°C | |
| OCT 6 | 19.8°C | 18.5°C | |
| OCT 7 | 19.6°C | 18.5°C | |
| OCT 8 | 19.5°C | 18.5°C | |
| OCT 9 | 19.2°C | 18.5°C | |
| OCT 10 | 19.0°C | 18.5°C | |
| OCT 11 | 18.7°C | 18.5°C | |
| OCT 12 | 18.5°C | 18.5°C | |
| OCT 13 | 18.5°C | 19.5°C | |
| OCT 14 | 18.5°C | 19.4°C | |
| OCT 15 | 18.5°C | 19.4°C | |
| OCT 16 | 18.5°C | 19.3°C | |
| OCT 17 | 18.5°C | 19.3°C | |
| OCT 18 | 18.5°C | 19.2°C | |
| OCT 19 | 18.5°C | 19.2°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 | 4°C | 7°C | 9°C |
| February | 5°C | 8°C | 10°C |
| March | 6°C | 12°C | 19°C |
| April | 7°C | 13°C | 19°C |
| May | 15°C | 20°C | 25°C |
| June | 20°C | 24°C | 28°C |
| July | 24°C | 28°C | 32°C |
| August | 24°C | 29°C | 34°C |
| September | 20°C | 25°C | 31°C |
| October | 15°C | 19°C | 22°C |
| November | 10°C | 14°C | 17°C |
| December | 6°C | 9°C | 11°C |
Gunlock Reservoir: Water Temperature by Location
Gunlock Reservoir: Weather Forecast
October 13
October 14
October 15
October 16
October 17
October 18
Location & Local Information
Gunlock Reservoir, located in southwestern Utah, experiences a wide range of surface water temperatures through the year. In midsummer the top layer of water commonly warms to roughly 75–85°F (24–29°C), and on very hot afternoons can edge toward the upper 80s°F (~30°C). During spring and fall the surface is cooler, typically in the range of about 45–70°F (7–21°C) depending on recent air temperatures and inflow. In winter the reservoir often drops to near freezing or slightly above, with surface readings around 33–45°F (1–7°C), although ice cover is uncommon and temperatures vary with storms and water releases.
Swimming at Gunlock Reservoir is generally permitted as a recreational activity, but it is not a supervised beach and conditions can be changeable. Because the site is a working reservoir with variable water levels, boat traffic, submerged hazards and cold shoulder-season temperatures, swimmers should be cautious: cold water shock and hypothermia are real risks outside the warmest months, and there are typically no lifeguards on duty. Visitors should follow posted rules, be mindful of boats, and choose summer days for the most comfortable and safest swimming conditions.