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 20°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 |
|---|---|---|---|
| JUN 3 | 16.8°C | 18.9°C | |
| JUN 4 | 16.8°C | 18.9°C | |
| JUN 5 | 17.0°C | 18.9°C | |
| JUN 6 | 17.1°C | 18.9°C | |
| JUN 7 | 17.3°C | 18.9°C | |
| JUN 8 | 20.3°C | 18.9°C | |
| JUN 10 | 20.0°C | 18.9°C | |
| JUN 11 | 18.9°C | 19.9°C | |
| JUN 12 | 18.9°C | 19.9°C | |
| JUN 13 | 18.9°C | 19.8°C | |
| JUN 14 | 18.9°C | 19.8°C | |
| JUN 15 | 18.9°C | 19.7°C | |
| JUN 16 | 18.9°C | 19.7°C | |
| JUN 17 | 18.9°C | 19.6°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 | 21°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
June 9
June 10
June 11
June 12
June 13
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.