Lake of Egypt — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Lake of Egypt, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Lake of Egypt today is 20.1°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 |
|---|---|---|---|
| OCT 5 | 22.8°C | 21.0°C | |
| OCT 6 | 22.3°C | 21.0°C | |
| OCT 7 | 22.3°C | 21.0°C | |
| OCT 8 | 21.4°C | 21.0°C | |
| OCT 9 | 21.1°C | 21.0°C | |
| OCT 10 | 21.7°C | 21.0°C | |
| OCT 11 | 20.9°C | 21.0°C | |
| OCT 12 | 21.1°C | 21.0°C | |
| OCT 13 | 21.0°C | 20.1°C | |
| OCT 14 | 21.0°C | 20.2°C | |
| OCT 15 | 21.0°C | 20.2°C | |
| OCT 16 | 21.0°C | 20.3°C | |
| OCT 17 | 21.0°C | 20.3°C | |
| OCT 18 | 21.0°C | 20.4°C | |
| OCT 19 | 21.0°C | 20.4°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 | 2°C | 7°C | 10°C |
| February | 0°C | 2°C | 5°C |
| March | 0°C | 6°C | 12°C |
| April | 8°C | 14°C | 20°C |
| May | 15°C | 20°C | 25°C |
| June | 20°C | 25°C | 30°C |
| July | 25°C | 30°C | 34°C |
| August | 25°C | 28°C | 31°C |
| September | 22°C | 25°C | 28°C |
| October | 17°C | 21°C | 25°C |
| November | 10°C | 14°C | 17°C |
| December | 4°C | 8°C | 10°C |
Lake of Egypt: Water Temperature by Location
Lake of Egypt: Weather Forecast
October 13
October 14
October 15
October 16
October 17
October 18
Location & Local Information
Lake of Egypt, a reservoir in southern Illinois, experiences noticeable seasonal shifts in surface water temperature. In winter months the lake commonly chills to near freezing, roughly 32–45°F (0–7°C) in open water and colder in sheltered shallows when ice forms at times. Spring sees a steady rise, with surface readings typically between about 45–65°F (7–18°C) as the water warms. Peak summer temperatures often reach roughly 70–85°F (21–29°C) in most areas, with shallow bays occasionally climbing into the upper 80s°F (around 29–31°C) on hot spells. As autumn progresses the lake cools again, with surface temperatures generally falling into the 50–65°F range (10–18°C) by late fall.
Swimming at Lake of Egypt is commonly possible in designated or commonly used areas because the reservoir is used for recreation, but it is subject to local rules and safety considerations. Authorities or private property owners may permit swimming while restricting it near boat channels or infrastructure to reduce hazards; lifeguards are not typically provided at most informal sites. Water quality is monitored at times and advisories can be issued, so swimmers are advised to check current conditions, respect posted signs, and be mindful of boat traffic and sudden changes in temperature that can affect comfort and safety.