Tainter Lake — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Tainter Lake, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Tainter Lake today is 18.1°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
⚠️ As of today, the minimum water temperature ranges from 65°F (18°C) to 68°F (20°C). This is already quite warm water, which is ideal for most people. Swimming becomes comfortable, and prolonged stays in the water do not cause discomfort. This temperature is perfect for family trips and for those who prefer warmer water. It is also comfortable for water sports such as surfing or swimming. 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 |
|---|---|---|---|
| SEP 14 | 19.7°C | 18.6°C | |
| SEP 15 | 18.3°C | 18.6°C | |
| SEP 16 | 18.3°C | 18.6°C | |
| SEP 17 | 18.6°C | 18.6°C | |
| SEP 18 | 17.7°C | 18.6°C | |
| SEP 19 | 18.1°C | 18.6°C | |
| SEP 20 | 18.0°C | 18.6°C | |
| SEP 22 | 18.6°C | 18.1°C | |
| SEP 23 | 18.6°C | 18.2°C | |
| SEP 24 | 18.6°C | 18.2°C | |
| SEP 25 | 18.6°C | 18.2°C | |
| SEP 26 | 18.6°C | 18.2°C | |
| SEP 27 | 18.6°C | 18.3°C | |
| SEP 28 | 18.6°C | 18.3°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 | 1°C | 3°C |
| February | 0°C | 1°C | 3°C |
| March | 0°C | 3°C | 6°C |
| April | 1°C | 8°C | 15°C |
| May | 9°C | 15°C | 22°C |
| June | 15°C | 19°C | 23°C |
| July | 20°C | 24°C | 27°C |
| August | 19°C | 25°C | 30°C |
| September | 14°C | 19°C | 24°C |
| October | 9°C | 14°C | 18°C |
| November | 2°C | 8°C | 12°C |
| December | 0°C | 2°C | 4°C |
Tainter Lake: Water Temperature by Location
Tainter Lake: Weather Forecast
September 21
September 22
September 23
September 24
September 25
Location & Local Information
Lake Tainter, a reservoir in Dunn County, Wisconsin, experiences typical seasonal temperature swings for a midwestern lake. In spring the surface water commonly ranges from about 34–55°F (1–13°C) as runoff and cool air keep temperatures low. By summer, surface temperatures usually rise into the mid‑60s to upper‑70s °F (about 18–27°C), with shallow near‑shore water warming fastest on warm sunny days. In autumn the lake cools back to roughly 50–65°F (10–18°C), and in winter the surface often freezes; water under the ice is near 32–39°F (0–4°C), with deeper layers remaining slightly warmer. Thermal stratification can produce cooler deep water even during warm months, so temperatures vary with depth and location.
Swimming at Lake Tainter is generally permitted and is a common recreational use because the lake and adjacent county parks provide public access, beaches, and boat launches. However, actual swimability depends on conditions: early‑season waters can be dangerously cold, and late‑summer warmth can promote algal blooms or bacterial issues that lead authorities to post advisories or close beaches temporarily. Lifeguards are not guaranteed at all access points, so swimmers should obey posted signs, check local health advisories before entering the water, and be mindful of hypothermia risk, boat traffic, and changing weather.