Beaver Dam Lake — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Beaver Dam Lake, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Beaver Dam Lake today is 21.2°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 | 20.4°C | 18.1°C | |
| JUN 4 | 20.4°C | 18.1°C | |
| JUN 5 | 20.7°C | 18.1°C | |
| JUN 6 | 21.0°C | 18.1°C | |
| JUN 7 | 21.2°C | 18.1°C | |
| JUN 8 | 21.3°C | 18.1°C | |
| JUN 10 | 21.2°C | 18.1°C | |
| JUN 11 | 18.1°C | 21.0°C | |
| JUN 12 | 18.1°C | 20.9°C | |
| JUN 13 | 18.1°C | 20.7°C | |
| JUN 14 | 18.1°C | 20.6°C | |
| JUN 15 | 18.1°C | 20.4°C | |
| JUN 16 | 18.1°C | 20.3°C | |
| JUN 17 | 18.1°C | 20.1°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 | 5°C |
| February | 0°C | 3°C | 6°C |
| March | 1°C | 5°C | 8°C |
| April | 3°C | 8°C | 14°C |
| May | 8°C | 14°C | 20°C |
| June | 15°C | 18°C | 22°C |
| July | 20°C | 25°C | 29°C |
| August | 21°C | 24°C | 27°C |
| September | 17°C | 20°C | 22°C |
| October | 13°C | 16°C | 19°C |
| November | 3°C | 9°C | 15°C |
| December | 0°C | 3°C | 6°C |
Beaver Dam Lake: Water Temperature by Location
Beaver Dam Lake: Weather Forecast
June 9
June 10
June 11
June 12
Location & Local Information
Beaver Dam Lake, in southeastern Wisconsin, experiences a wide range of water temperatures through the year. In winter months the lake cools to near freezing, typically around 32–36°F (0–2°C) under or just below ice cover. Spring brings a gradual rise, with surface temperatures commonly in the 40–60°F range (4–16°C) as snowmelt and runoff persist. Summer is when the lake is warmest, often reaching about 70–82°F (21–28°C) on the surface during hot spells. By autumn the water cools again to roughly 50–65°F (10–18°C) as air temperatures fall and stratification breaks down.
Swimming in Beaver Dam Lake is generally possible and commonly practiced in the warmer months because summer temperatures frequently reach comfortable ranges for recreational bathing. Access at public parks and some shorelines makes swimming feasible, but users should be mindful of water-quality advisories, occasional algal blooms, aquatic vegetation, boat traffic and the absence of lifeguards at many sites. Ice cover in winter makes open-water swimming unsafe except for specialized, controlled events. Checking local conditions and advisories before entering the water is recommended for both safety and health reasons.