Namekagon Lake — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Namekagon Lake, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Namekagon Lake today is 17.9°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
⚠️ As of today, the minimum water temperature ranges from 60°F (15°C) to 65°F (18°C). The water is comfortable for most people, making it an ideal range for water sports enthusiasts. The temperature does not cause significant discomfort, and swimming will be pleasant for the majority. However, it's important to remember that prolonged exposure to the water can still lead to cooling, so it's essential to monitor the time spent in the water, especially for children or elderly people. 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 | 20.4°C | 17.7°C | |
| SEP 15 | 19.1°C | 17.7°C | |
| SEP 16 | 19.1°C | 17.7°C | |
| SEP 17 | 19.4°C | 17.7°C | |
| SEP 18 | 18.2°C | 17.7°C | |
| SEP 19 | 18.8°C | 17.7°C | |
| SEP 20 | 19.0°C | 17.7°C | |
| SEP 22 | 17.7°C | 17.9°C | |
| SEP 23 | 17.7°C | 17.9°C | |
| SEP 24 | 17.7°C | 17.9°C | |
| SEP 25 | 17.7°C | 17.9°C | |
| SEP 26 | 17.7°C | 17.9°C | |
| SEP 27 | 17.7°C | 17.8°C | |
| SEP 28 | 17.7°C | 17.8°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 | 2°C | 5°C |
| March | 0°C | 3°C | 6°C |
| April | 1°C | 6°C | 11°C |
| May | 8°C | 13°C | 19°C |
| June | 13°C | 17°C | 21°C |
| July | 18°C | 23°C | 27°C |
| August | 18°C | 24°C | 30°C |
| September | 13°C | 18°C | 23°C |
| October | 9°C | 13°C | 17°C |
| November | 2°C | 8°C | 13°C |
| December | 0°C | 3°C | 6°C |
Namekagon Lake: Water Temperature by Location
Namekagon Lake: Weather Forecast
September 22
September 23
September 24
September 25
Location & Local Information
Namekagon Lake in northern Wisconsin experiences a typical seasonal progression of water temperatures associated with inland glacial lakes. In summer surface temperatures commonly range from about 68–76°F (20–24°C), and during heat spells can briefly climb into the high 70s or low 80s °F (25–27°C). Spring sees a rapid warming from near-freezing runoff and ice-out conditions, with surface readings often between 45–60°F (7–16°C) through May and early June. By autumn the surface cools again, generally dropping into the 50–65°F (10–18°C) band, and in winter the lake is often ice-covered with water beneath the ice typically close to 34–39°F (1–4°C).
Swimming in Namekagon Lake is generally allowed and is a common summer activity because the lake has boat landings, shorelines used for recreation, and suitable summer surface temperatures for bathing. The season for comfortable swimming is relatively short compared with southern lakes, concentrated in midsummer when surface waters reach the mid-60s to mid-70s °F (around 18–24°C). Swimmers should be mindful of variable conditions: sudden temperature drops with depth, changeable weather, local water-quality advisories, and absence of lifeguards at many access points, so practicing usual water-safety precautions is recommended.