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 23.3°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 | 23.8°C | 24.0°C | |
| AUG 5 | 23.7°C | 24.0°C | |
| AUG 6 | 23.7°C | 24.0°C | |
| AUG 7 | 24.5°C | 24.0°C | |
| AUG 8 | 24.3°C | 24.0°C | |
| AUG 9 | 24.3°C | 24.0°C | |
| AUG 10 | 24.2°C | 24.0°C | |
| AUG 11 | 23.1°C | 24.0°C | |
| AUG 12 | 24.0°C | 23.3°C | |
| AUG 13 | 24.0°C | 23.4°C | |
| AUG 14 | 24.0°C | 23.4°C | |
| AUG 15 | 24.0°C | 23.4°C | |
| AUG 16 | 24.0°C | 23.5°C | |
| AUG 17 | 24.0°C | 23.5°C | |
| AUG 18 | 24.0°C | 23.5°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 | 16°C | 19°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
August 12
August 13
August 14
August 15
August 16
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.