Channel Lake — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Channel Lake, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Channel Lake today is 18.9°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 | 20.4°C | 21.3°C | |
| SEP 14 | 20.5°C | 21.3°C | |
| SEP 15 | 21.2°C | 21.3°C | |
| SEP 16 | 19.2°C | 21.3°C | |
| SEP 17 | 18.9°C | 21.3°C | |
| SEP 18 | 19.2°C | 21.3°C | |
| SEP 19 | 19.4°C | 21.3°C | |
| SEP 20 | 19.0°C | 21.3°C | |
| SEP 21 | 21.3°C | 19.0°C | |
| SEP 22 | 21.3°C | 19.1°C | |
| SEP 23 | 21.3°C | 19.3°C | |
| SEP 24 | 21.3°C | 19.4°C | |
| SEP 25 | 21.3°C | 19.5°C | |
| SEP 26 | 21.3°C | 19.6°C | |
| SEP 27 | 21.3°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 | 4°C | 8°C |
| February | 1°C | 4°C | 7°C |
| March | 2°C | 5°C | 9°C |
| April | 5°C | 9°C | 13°C |
| May | 10°C | 14°C | 19°C |
| June | 16°C | 19°C | 23°C |
| July | 20°C | 25°C | 30°C |
| August | 23°C | 26°C | 28°C |
| September | 18°C | 21°C | 25°C |
| October | 13°C | 17°C | 20°C |
| November | 4°C | 9°C | 14°C |
| December | 4°C | 3°C | 9°C |
Channel Lake: Water Temperature by Location
Channel Lake: Weather Forecast
September 21
September 22
September 23
September 24
September 25
September 26
Location & Local Information
Channel Lake, part of the Chain O’Lakes area in northern Illinois, experiences typical Midwestern seasonal water temperatures. In winter the surface often approaches freezing—about 32°F (0°C)—and can be ice-covered for periods. Spring warming generally brings surface temperatures from roughly 40–60°F (4–16°C) as the ice melts and the lake stratifies. In summer the surface commonly ranges from about 70–80°F (21–27°C) and, during warm spells, can climb into the low 80s (around 28–29°C). By fall the water cools back through the 60–40°F window (16–4°C) as air temperatures drop and the lake mixes.
Swimming is generally permitted at Channel Lake from public access points and private shorelines, but there are few if any staffed beaches and conditions vary. Occasional algae blooms, elevated bacteria levels after heavy rains, abundant aquatic vegetation and shallow, muddy areas can make swimming unpleasant or unsafe; local health departments may post advisories when water quality is a concern. Visitors should check current local advisories before entering the water, be aware there may be no lifeguards on duty, and use caution around weeds and shallow drop-offs.