Pierce Lake — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Pierce Lake, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Pierce Lake today is 23°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 23 | 21.9°C | 20.6°C | |
| JUN 24 | 22.0°C | 20.6°C | |
| JUN 25 | 21.9°C | 20.6°C | |
| JUN 26 | 22.0°C | 20.6°C | |
| JUN 27 | 21.7°C | 20.6°C | |
| JUN 28 | 22.1°C | 20.6°C | |
| JUN 29 | 22.3°C | 20.6°C | |
| JUN 30 | 23.0°C | 20.6°C | |
| JUL 1 | 26.0°C | 23.2°C | |
| JUL 2 | 26.0°C | 23.3°C | |
| JUL 3 | 26.0°C | 23.5°C | |
| JUL 4 | 26.0°C | 23.6°C | |
| JUL 5 | 26.0°C | 23.8°C | |
| JUL 6 | 26.0°C | 23.9°C | |
| JUL 7 | 26.0°C | 24.1°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 | 4°C |
| February | 0°C | 3°C | 6°C |
| March | 2°C | 5°C | 8°C |
| April | 6°C | 10°C | 15°C |
| May | 11°C | 16°C | 21°C |
| June | 18°C | 21°C | 24°C |
| July | 22°C | 26°C | 30°C |
| August | 22°C | 24°C | 27°C |
| September | 18°C | 20°C | 22°C |
| October | 9°C | 15°C | 21°C |
| November | 2°C | 7°C | 11°C |
| December | 0°C | 3°C | 6°C |
Pierce Lake: Water Temperature by Location
Pierce Lake: Weather Forecast
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July 5
Location & Local Information
Pierce Lake in Illinois typically follows the seasonal temperature patterns common to small Midwestern lakes. During winter the surface cools to near freezing, around 32–39°F (0–4°C), and may remain that cold under ice cover. In spring the water warms unevenly as runoff and air temperatures change, generally ranging from about 40–60°F (4–16°C). Summer brings the warmest conditions, with surface temperatures often between 70–80°F (21–27°C) and occasionally reaching 80–85°F (27–29°C) in shallow, sheltered bays on hot, calm days. In autumn the lake cools again toward 50–65°F (10–18°C) as air temperatures drop and stratification breaks down. Actual temperatures vary with depth, local inflows, wind, and recent weather.
Swimming at Pierce Lake is generally permitted in designated recreational areas during the warmer months because the lake is managed for public use and recreation. However, swimming access depends on current water-quality and safety conditions: advisories or closures can be issued for high bacteria levels, harmful algal blooms, unsafe weather or ice conditions, and conflicts with boating activity. Lifeguard availability also varies, so visitors are advised to observe posted rules and consult local authorities or signage before entering the water to ensure conditions are acceptable.