Black Hawk Lake — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Black Hawk Lake, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Black Hawk Lake today is 21.8°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
✅ As of today, the minimum water temperature ranges from 68°F (20°C) to 74°F (23°C). The water is warm and pleasant for swimming, and in this range, one can stay in the water for extended periods without the risk of hypothermia. This is the ideal temperature for relaxation, swimming, and water sports. Families with children, as well as outdoor enthusiasts, will enjoy swimming and time spent in the water. For most people, this is the optimal temperature for a comfortable beach experience. 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 | 20.7°C | 20.0°C | |
| JUN 4 | 20.7°C | 20.0°C | |
| JUN 5 | 20.8°C | 20.0°C | |
| JUN 6 | 21.0°C | 20.0°C | |
| JUN 7 | 21.5°C | 20.0°C | |
| JUN 8 | 21.6°C | 20.0°C | |
| JUN 10 | 21.8°C | 20.0°C | |
| JUN 11 | 20.0°C | 21.7°C | |
| JUN 12 | 20.0°C | 21.6°C | |
| JUN 13 | 20.0°C | 21.5°C | |
| JUN 14 | 20.0°C | 21.4°C | |
| JUN 15 | 20.0°C | 21.4°C | |
| JUN 16 | 20.0°C | 21.3°C | |
| JUN 17 | 20.0°C | 21.2°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 | 3°C | 5°C |
| February | 0°C | 4°C | 7°C |
| March | 1°C | 5°C | 8°C |
| April | 5°C | 10°C | 16°C |
| May | 11°C | 16°C | 21°C |
| June | 16°C | 20°C | 24°C |
| July | 19°C | 25°C | 30°C |
| August | 20°C | 24°C | 27°C |
| September | 17°C | 21°C | 24°C |
| October | 13°C | 16°C | 19°C |
| November | 3°C | 8°C | 12°C |
| December | 0°C | 2°C | 5°C |
Black Hawk Lake: Water Temperature by Location
Black Hawk Lake: Weather Forecast
June 9
June 10
June 11
June 12
June 13
Location & Local Information
Black Hawk Lake, like many small inland lakes in Wisconsin, shows clear seasonal swings in surface temperature that depend on air temperature, depth and local conditions. In spring (April–May) surface temperatures commonly range from about 40–60°F (4–15°C) as the water slowly warms. By early to mid summer (June–July) temperatures typically climb into the 65–75°F (18–24°C) range, with peak summer (late July–August) often reaching 75–85°F (24–29°C) in shallower bays on warm years. In fall (September–October) the lake cools back to roughly 45–65°F (7–18°C) as air temperatures drop. In winter the surface freezes; beneath the ice the deep water stays near the density maximum around 34–39°F (1–4°C) while the ice itself is at or below 32°F (0°C). Local weather, wind and water clarity can shift these values by several degrees.
Swimming is generally possible at Black Hawk Lake where public access or shoreline entry is available, but specifics depend on local management, posted advisories and water quality monitoring. The warmest and most comfortable swimming conditions tend to occur in July and August; spring and fall waters are often brisk and less inviting, and winter swimming requires ice-safety experience and is not recommended without supervision. Some shorelines or parks may provide designated swim areas or lifeguards during the summer; where none exist, swimming is at your own risk and subject to any health advisories or beach closures issued by local authorities.