Sherman Reservoir — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Sherman Reservoir, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Sherman Reservoir today is 16.4°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
⚠️ As of today, the minimum water temperature ranges from 60°F (15°C) to 65°F (18°C). The water is comfortable for most people, making it an ideal range for water sports enthusiasts. The temperature does not cause significant discomfort, and swimming will be pleasant for the majority. However, it's important to remember that prolonged exposure to the water can still lead to cooling, so it's essential to monitor the time spent in the water, especially for children or elderly people. 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 6 | 17.4°C | 17.5°C | |
| OCT 7 | 15.9°C | 17.5°C | |
| OCT 8 | 17.1°C | 17.5°C | |
| OCT 9 | 17.1°C | 17.5°C | |
| OCT 10 | 16.0°C | 17.5°C | |
| OCT 11 | 15.5°C | 17.5°C | |
| OCT 12 | 15.9°C | 17.5°C | |
| OCT 13 | 15.7°C | 17.5°C | |
| OCT 14 | 17.5°C | 16.5°C | |
| OCT 15 | 17.5°C | 16.5°C | |
| OCT 16 | 17.5°C | 16.6°C | |
| OCT 17 | 17.5°C | 16.6°C | |
| OCT 18 | 17.5°C | 16.7°C | |
| OCT 19 | 17.5°C | 16.7°C | |
| OCT 20 | 17.5°C | 16.8°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 | 1°C | 4°C |
| February | 0°C | 2°C | 5°C |
| March | 1°C | 9°C | 17°C |
| April | 8°C | 13°C | 19°C |
| May | 11°C | 17°C | 24°C |
| June | 18°C | 22°C | 26°C |
| July | 23°C | 27°C | 31°C |
| August | 23°C | 26°C | 29°C |
| September | 21°C | 24°C | 27°C |
| October | 14°C | 18°C | 21°C |
| November | 3°C | 11°C | 17°C |
| December | 1°C | 3°C | 6°C |
Sherman Reservoir: Water Temperature by Location
Sherman Reservoir: Weather Forecast
October 14
October 15
October 16
October 17
October 18
Location & Local Information
Sherman Reservoir’s water temperature varies considerably through the year because it is a relatively shallow prairie reservoir that responds quickly to air temperature. In winter the surface often nears freezing, roughly 33–40°F (1–4°C). Spring sees a steady warm-up with waters commonly in the 45–65°F (7–18°C) range as runoff and air temperatures rise. Peak summer surface temperatures frequently fall between about 70–80°F (21–27°C) on warm, calm days, though heat waves can push the surface a few degrees higher. In autumn the reservoir cools back toward 50–65°F (10–18°C) before the onset of winter ice and near-freezing conditions.
Swimming at Sherman Reservoir is generally allowed in shoreline and recreation-area locations, but there are practical and regulatory caveats. Designated swimming areas may lack lifeguards, so swimmers should exercise caution, wear life jackets if uncertainty exists, and be mindful of changing conditions such as wind, boat traffic, and variable depth caused by water-level fluctuations. Water temperature, seasonal algal growth, and local advisories can affect safety and comfort, so checking current conditions and posted notices at the recreation area is recommended before entering the water.