Lake Chetac — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Lake Chetac, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Lake Chetac today is 23.8°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
✅ As of today, the minimum water temperature ranges from 75°F (23°C) to 79°F (26°C). This is a very comfortable temperature for swimming, and many people can enjoy prolonged stays in the water without feeling cold. The water is pleasantly warm, making it ideal for relaxation and water sports. This temperature range is particularly popular among tourists, as it combines comfort and safety for health. 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 |
|---|---|---|---|
| AUG 4 | 26.2°C | 24.5°C | |
| AUG 5 | 26.2°C | 24.5°C | |
| AUG 6 | 26.1°C | 24.5°C | |
| AUG 7 | 26.1°C | 24.5°C | |
| AUG 8 | 26.1°C | 24.5°C | |
| AUG 9 | 26.1°C | 24.5°C | |
| AUG 10 | 25.6°C | 24.5°C | |
| AUG 11 | 23.7°C | 24.5°C | |
| AUG 12 | 24.5°C | 23.8°C | |
| AUG 13 | 24.5°C | 23.9°C | |
| AUG 14 | 24.5°C | 23.9°C | |
| AUG 15 | 24.5°C | 23.9°C | |
| AUG 16 | 24.5°C | 24.0°C | |
| AUG 17 | 24.5°C | 24.0°C | |
| AUG 18 | 24.5°C | 24.0°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 | 1°C | 3°C |
| February | 0°C | 1°C | 3°C |
| March | 0°C | 3°C | 6°C |
| April | 1°C | 6°C | 12°C |
| May | 9°C | 14°C | 19°C |
| June | 16°C | 19°C | 22°C |
| July | 20°C | 24°C | 27°C |
| August | 19°C | 25°C | 30°C |
| September | 14°C | 16°C | 19°C |
| October | 9°C | 14°C | 18°C |
| November | 2°C | 8°C | 13°C |
| December | 0°C | 2°C | 4°C |
Lake Chetac: Water Temperature by Location
Lake Chetac: Weather Forecast
August 12
August 13
August 14
August 15
August 16
Location & Local Information
Lake Chetac in northern Wisconsin experiences a clear seasonal cycle in surface water temperature. In spring the lake usually warms from near freezing up to roughly 40–60°F (4–16°C) as ice melts and air temperatures climb. Summer surface temperatures commonly rise into the upper 60s to mid-70s °F (about 20–24°C), and on warm, calm stretches can reach the upper 70s °F (around 25–26°C). Early fall sees cooling back into the 50s–60s °F (10–16°C) as the lake begins to turnover. In winter the surface approaches freezing, often hovering near 32–39°F (0–4°C) under ice. These ranges describe surface conditions; deeper water remains colder year-round and thermal stratification in summer can create cooler layers below the surface.
Swimming is generally permitted in Lake Chetac and is most comfortable in mid to late summer when surface temperatures are warmest. Local access points, private shorelines, and any designated beaches may have different rules, and occasional water-quality advisories or algae blooms can restrict swimming for health reasons. Cold shoulder seasons carry a significant risk of cold-water shock or hypothermia, so swimming outside the warm summer months is not recommended. Always check current local conditions and posted guidance before entering the water.