Nagawicka Lake — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Nagawicka Lake, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Nagawicka Lake today is 19.3°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 13 | 19.9°C | 21.0°C | |
| SEP 14 | 19.6°C | 21.0°C | |
| SEP 15 | 19.9°C | 21.0°C | |
| SEP 16 | 19.5°C | 21.0°C | |
| SEP 17 | 19.7°C | 21.0°C | |
| SEP 18 | 19.4°C | 21.0°C | |
| SEP 19 | 19.2°C | 21.0°C | |
| SEP 20 | 19.0°C | 21.0°C | |
| SEP 21 | 21.0°C | 19.4°C | |
| SEP 22 | 21.0°C | 19.5°C | |
| SEP 23 | 21.0°C | 19.6°C | |
| SEP 24 | 21.0°C | 19.6°C | |
| SEP 25 | 21.0°C | 19.7°C | |
| SEP 26 | 21.0°C | 19.8°C | |
| SEP 27 | 21.0°C | 19.9°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 | 4°C |
| February | 1°C | 4°C | 6°C |
| March | 1°C | 5°C | 8°C |
| April | 5°C | 9°C | 13°C |
| May | 6°C | 13°C | 19°C |
| June | 16°C | 19°C | 23°C |
| July | 20°C | 25°C | 30°C |
| August | 22°C | 25°C | 27°C |
| September | 18°C | 21°C | 24°C |
| October | 13°C | 17°C | 20°C |
| November | 3°C | 9°C | 15°C |
| December | 0°C | 3°C | 6°C |
Nagawicka Lake: Water Temperature by Location
Nagawicka Lake: Weather Forecast
September 21
September 22
September 23
September 24
September 25
September 26
Location & Local Information
Nagawicka Lake in Waukesha County experiences a clear seasonal cycle in water temperature. In spring the surface usually runs from about 40–60°F (4–16°C) as the lake mixes and cools slowly. By summer surface temperatures commonly reach 70–80°F (21–27°C), with shallow bays sometimes climbing toward the mid-80s°F (about 29°C) on hot, calm days. In early fall the water typically cools to roughly 50–65°F (10–18°C) as air temperatures drop, and by winter the lake approaches freezing at or below 32°F (0°C) and often forms stable ice cover. These ranges are averages for surface conditions; deeper water remains colder year-round and warms or cools more slowly.
Swimming is a common recreational activity on Nagawicka Lake and is generally permitted at public access points and private shorelines, but it is subject to local rules and occasional advisories. Summer surface temperatures are usually comfortable for most swimmers, while spring and fall can feel brisk and winter swimming is unsafe except for managed ice-swimming events with proper precautions. Authorities may close or advise against swimming when bacterial contamination or harmful algal blooms are detected, and swimmers should heed posted signs, check local water-quality updates, and consider water depth, currents and personal safety when deciding to enter the lake.