Pistakee Lake — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Pistakee Lake, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Pistakee Lake today is 19.2°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 |
|---|---|---|---|
| SEP 13 | 20.3°C | 20.7°C | |
| SEP 14 | 20.7°C | 20.7°C | |
| SEP 15 | 21.4°C | 20.7°C | |
| SEP 16 | 19.8°C | 20.7°C | |
| SEP 17 | 19.4°C | 20.7°C | |
| SEP 18 | 19.7°C | 20.7°C | |
| SEP 19 | 19.7°C | 20.7°C | |
| SEP 20 | 19.3°C | 20.7°C | |
| SEP 21 | 20.7°C | 19.3°C | |
| SEP 22 | 20.7°C | 19.4°C | |
| SEP 23 | 20.7°C | 19.4°C | |
| SEP 24 | 20.7°C | 19.5°C | |
| SEP 25 | 20.7°C | 19.6°C | |
| SEP 26 | 20.7°C | 19.7°C | |
| SEP 27 | 20.7°C | 19.7°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 | 7°C |
| February | 1°C | 3°C | 6°C |
| March | 2°C | 5°C | 8°C |
| April | 5°C | 9°C | 13°C |
| May | 9°C | 14°C | 18°C |
| June | 16°C | 19°C | 22°C |
| July | 19°C | 25°C | 31°C |
| August | 21°C | 24°C | 28°C |
| September | 17°C | 21°C | 25°C |
| October | 12°C | 16°C | 19°C |
| November | 0°C | 6°C | 12°C |
| December | 3°C | 3°C | 8°C |
Pistakee Lake: Water Temperature by Location
Pistakee Lake: Weather Forecast
September 21
September 22
September 23
September 24
September 25
September 26
Location & Local Information
Pistakee Lake, part of Illinois’ Chain O’Lakes, is relatively shallow and therefore responds quickly to seasonal weather. In winter the surface often approaches freezing and can be around 33–40°F (0.5–4°C) under ice. Spring sees a steady rise, typically 40–65°F (4–18°C) as the lake mixes and warms. Peak summer temperatures commonly sit between 70–80°F (21–27°C) and, during hot spells, can reach the low 80s°F (28–30°C). By autumn the water cools back into the 50–70°F range (10–21°C) as air temperatures decline. Because the lake is shallow and has abundant vegetation, temperature stratification is limited and surface readings are the most useful indicator for recreational activities.
Swimming in Pistakee Lake is possible in many spots, but formal public beaches are limited and conditions vary. The presence of heavy boat traffic, aquatic plants, and occasional algal blooms can make open-water swimming less appealing and sometimes unsafe; local authorities may post advisories when water quality is poor. Many people swim from private docks or quieter coves during warm months, but caution is advised—check current water-quality alerts, avoid areas with thick vegetation or visible blue‑green algae, and be mindful of boats and wakes. Life jackets and common‑sense safety measures are recommended for any lake swimming.