Mallard Lake — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Mallard Lake, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Mallard Lake today is 15.1°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 5 | 15.2°C | 18.5°C | |
| OCT 6 | 15.7°C | 18.5°C | |
| OCT 7 | 15.4°C | 18.5°C | |
| OCT 8 | 15.9°C | 18.5°C | |
| OCT 9 | 16.4°C | 18.5°C | |
| OCT 10 | 16.5°C | 18.5°C | |
| OCT 11 | 15.7°C | 18.5°C | |
| OCT 12 | 15.8°C | 18.5°C | |
| OCT 13 | 18.5°C | 15.3°C | |
| OCT 14 | 18.5°C | 15.4°C | |
| OCT 15 | 18.5°C | 15.6°C | |
| OCT 16 | 18.5°C | 15.8°C | |
| OCT 17 | 18.5°C | 16.0°C | |
| OCT 18 | 18.5°C | 16.1°C | |
| OCT 19 | 18.5°C | 16.3°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 | 1°C | 3°C | 6°C |
| February | 1°C | 6°C | 10°C |
| March | 3°C | 8°C | 13°C |
| April | 7°C | 12°C | 17°C |
| May | 13°C | 17°C | 21°C |
| June | 19°C | 22°C | 25°C |
| July | 23°C | 27°C | 31°C |
| August | 24°C | 26°C | 29°C |
| September | 20°C | 23°C | 26°C |
| October | 15°C | 19°C | 22°C |
| November | 4°C | 10°C | 14°C |
| December | 0°C | 3°C | 5°C |
Mallard Lake: Water Temperature by Location
Mallard Lake: Weather Forecast
October 13
October 14
October 15
October 16
October 17
October 18
Location & Local Information
Mallard Lake in northeastern Illinois follows the seasonal temperature patterns typical of shallow to moderately deep inland lakes in that region. In winter the surface hovers around freezing, about 32°F (0°C), and often forms ice. During spring temperatures generally rise from roughly 40–60°F (4–16°C) as snowmelt and runoff cool the water. By summer the lake commonly warms to the mid-60s to upper 70s °F, roughly 18–26°C, with warm spells sometimes pushing local surface readings into the low 80s °F (around 27–28°C) on calm, sunny days. In autumn the water cools back to the 50–65°F range (10–18°C). These ranges vary with depth, recent weather, and water clarity, so local measurements can differ from general expectations.
Swimming opportunities at Mallard Lake are limited because there are no designated public swimming beaches or lifeguarded areas; many similar forest preserve and small-lake sites discourage or prohibit open swimming for safety and management reasons. Concerns include lack of lifeguards, potential boat traffic, variable water quality and visibility, and underwater hazards. While some visitors may wade or enter the water at their own risk during warm months, official recreational swimming is not a primary managed use of the lake, and anyone considering entering the water should check current local rules and conditions.