Lake Wissota — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Lake Wissota, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Lake Wissota today is 19.4°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 14 | 20.1°C | 18.7°C | |
| SEP 15 | 19.2°C | 18.7°C | |
| SEP 16 | 19.2°C | 18.7°C | |
| SEP 17 | 19.2°C | 18.7°C | |
| SEP 18 | 18.6°C | 18.7°C | |
| SEP 19 | 19.1°C | 18.7°C | |
| SEP 20 | 18.9°C | 18.7°C | |
| SEP 22 | 18.7°C | 19.4°C | |
| SEP 23 | 18.7°C | 19.3°C | |
| SEP 24 | 18.7°C | 19.3°C | |
| SEP 25 | 18.7°C | 19.3°C | |
| SEP 26 | 18.7°C | 19.2°C | |
| SEP 27 | 18.7°C | 19.2°C | |
| SEP 28 | 18.7°C | 19.2°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 | 2°C | 4°C |
| April | 1°C | 8°C | 15°C |
| May | 8°C | 15°C | 22°C |
| June | 14°C | 18°C | 23°C |
| July | 20°C | 24°C | 28°C |
| August | 19°C | 25°C | 30°C |
| September | 14°C | 19°C | 24°C |
| October | 9°C | 14°C | 19°C |
| November | 2°C | 8°C | 13°C |
| December | 0°C | 1°C | 3°C |
Lake Wissota: Water Temperature by Location
Lake Wissota: Weather Forecast
September 21
September 22
September 23
September 24
September 25
Location & Local Information
Lake Wissota’s surface water temperature follows a typical northern-U.S. reservoir pattern, warming and cooling with the seasons. In spring the lake often sits in the 40s to low 60s °F (about 4–16 °C) as snowmelt and cool air keep the surface cold. By summer the top layer commonly reaches the 70s to around 80 °F (21–27 °C), and on hot spells can rise into the mid-80s (near 29 °C), while deeper water remains noticeably cooler (often in the 40s–50s °F, roughly 4–10 °C). In autumn surface temperatures drop back through the 50s–60s °F (10–16 °C) into the 30s–40s °F (0–4 °C) as the lake mixes and eventually freezes; winter conditions bring ice cover and near-freezing water under the ice.
Swimming is allowed at public access points and designated beaches (for example at Lake Wissota State Park) but is subject to seasonal conditions and local rules. Authorities monitor water quality and post advisories when algal blooms or other hazards occur, and boat traffic, sudden drop-offs and underwater vegetation can affect safety. Many swimming areas are unguarded, so swimmers should heed posted signs, avoid cold-water exposure in spring and fall to reduce cold-shock risk, and check current advisories before entering the water.