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 23.6°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 24 | 23.3°C | 24.0°C | |
| AUG 25 | 23.1°C | 24.0°C | |
| AUG 26 | 22.7°C | 24.0°C | |
| AUG 27 | 22.7°C | 24.0°C | |
| AUG 28 | 23.0°C | 24.0°C | |
| AUG 29 | 24.1°C | 24.0°C | |
| AUG 30 | 24.1°C | 24.0°C | |
| AUG 31 | 23.6°C | 24.0°C | |
| SEP 1 | 19.5°C | 23.4°C | |
| SEP 2 | 19.5°C | 23.2°C | |
| SEP 3 | 19.5°C | 23.0°C | |
| SEP 4 | 19.5°C | 22.8°C | |
| SEP 5 | 19.5°C | 22.6°C | |
| SEP 6 | 19.5°C | 22.4°C | |
| SEP 7 | 19.5°C | 22.2°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 | 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 | 19°C | 23°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
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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.