Tomahawk Lake — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Tomahawk Lake, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Tomahawk Lake today is 11.8°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
❌ As of today, the minimum water temperature ranges from 50°F (10°C) to 54°F (12°C). The water is slightly warmer, but still cool for most people. Swimming in such conditions is possible, but for most people, the time spent in the water should be limited to avoid hypothermia. Even experienced swimmers may feel discomfort if they stay in the water for too long. To improve comfort and safety, a wetsuit can be used. 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 | 13.7°C | 13.0°C | |
| OCT 6 | 13.7°C | 13.0°C | |
| OCT 7 | 12.7°C | 13.0°C | |
| OCT 8 | 12.5°C | 13.0°C | |
| OCT 9 | 12.6°C | 13.0°C | |
| OCT 10 | 12.3°C | 13.0°C | |
| OCT 11 | 10.4°C | 13.0°C | |
| OCT 12 | 10.0°C | 13.0°C | |
| OCT 13 | 13.0°C | 11.9°C | |
| OCT 14 | 13.0°C | 11.9°C | |
| OCT 15 | 13.0°C | 12.0°C | |
| OCT 16 | 13.0°C | 12.0°C | |
| OCT 17 | 13.0°C | 12.1°C | |
| OCT 18 | 13.0°C | 12.2°C | |
| OCT 19 | 13.0°C | 12.2°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 | 2°C | 4°C |
| February | 0°C | 2°C | 4°C |
| March | 0°C | 2°C | 5°C |
| April | 1°C | 5°C | 9°C |
| May | 6°C | 12°C | 18°C |
| June | 15°C | 18°C | 21°C |
| July | 18°C | 23°C | 27°C |
| August | 18°C | 24°C | 30°C |
| September | 14°C | 18°C | 21°C |
| October | 9°C | 13°C | 17°C |
| November | 3°C | 8°C | 13°C |
| December | 0°C | 2°C | 4°C |
Tomahawk Lake: Water Temperature by Location
Tomahawk Lake: Weather Forecast
October 13
October 14
October 15
October 16
October 17
Location & Local Information
Tomahawk Lake in northern Wisconsin experiences pronounced seasonal swings in surface water temperature. In spring the lake commonly ranges from about 40–60°F (4–16°C) as ice melts and the water stratifies; by early summer shallow bays and surface layers typically warm to roughly 60–75°F (16–24°C). Peak summer surface temperatures often reach the low to upper 70s and sometimes into the low 80s Fahrenheit (about 21–28°C) on warm, calm days, while deeper water remains markedly cooler. In autumn the surface cools back toward the 40–60°F (4–16°C) band as turnover occurs, and in winter the lake is usually at or just above freezing under ice cover, roughly 32–39°F (0–4°C) in the water column depending on depth.
Swimming in Tomahawk Lake is generally allowed in the warmer months and at designated public access points and beaches, because summertime surface temperatures frequently reach comfortable levels for recreational swimming. Seasonal and local restrictions can apply, however: swimming is unsafe when the lake is ice-covered, when local advisories warn of high bacteria or harmful algal blooms, or where underwater hazards or strong currents exist. Visitors should use marked swimming areas, heed posted notices, and be mindful that temperature varies with depth and location, so conditions that feel swimmable at a sunny shore can be much colder a few feet down.