Mosinee Flowage Lake — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Mosinee Flowage Lake, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Mosinee Flowage Lake 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 | 21.0°C | 18.1°C | |
| JUN 4 | 20.9°C | 18.1°C | |
| JUN 5 | 21.1°C | 18.1°C | |
| JUN 6 | 21.2°C | 18.1°C | |
| JUN 7 | 21.5°C | 18.1°C | |
| JUN 8 | 21.1°C | 18.1°C | |
| JUN 10 | 20.0°C | 18.1°C | |
| JUN 11 | 18.1°C | 19.9°C | |
| JUN 12 | 18.1°C | 19.8°C | |
| JUN 13 | 18.1°C | 19.7°C | |
| JUN 14 | 18.1°C | 19.6°C | |
| JUN 15 | 18.1°C | 19.5°C | |
| JUN 16 | 18.1°C | 19.4°C | |
| JUN 17 | 18.1°C | 19.3°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 | 0°C | 1°C | 3°C |
| February | 0°C | 2°C | 4°C |
| March | 0°C | 2°C | 5°C |
| April | 1°C | 8°C | 15°C |
| May | 7°C | 14°C | 21°C |
| June | 15°C | 18°C | 22°C |
| July | 18°C | 23°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 | 4°C | 9°C | 13°C |
| December | 0°C | 3°C | 5°C |
Mosinee Flowage Lake: Water Temperature by Location
Mosinee Flowage Lake: Weather Forecast
June 9
June 10
June 11
June 12
June 13
Location & Local Information
Lake of the Mosinee Flowage, like many inland Wisconsin flowages, shows a strong seasonal pattern in surface water temperature. In spring the surface is cool, often in the mid-40s to low 60s °F (7–17 °C) as snowmelt and chilled runoff dominate. By summer, surface temperatures commonly warm to the low 70s to low 80s °F (22–28 °C) on calm, sunny days and can occasionally reach the mid-80s °F (29–30 °C) during heat waves. In early autumn the surface cools back into the 50s and 60s °F (10–20 °C). When the lake freezes in winter the exposed surface is at or below 32 °F (0 °C) while water just under the ice remains near the temperature of maximum density, roughly 33–39 °F (1–4 °C). Deeper water stays significantly colder year-round due to stratification.
Swimming in the Mosinee Flowage is generally permitted from shorelines and public access points, and many people swim there in the warm months because surface temperatures are comfortable for recreation. There are no statewide bans, but safe swimming depends on local conditions: wind and boat traffic, absence of lifeguards, water clarity, and occasional algal blooms or posted advisories can make swimming unsafe at times. Because deeper water remains cool even in summer, swimmers should be cautious about temperature shock and current or wake conditions near boat channels.