Wapogasset Lake — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Wapogasset Lake, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Wapogasset Lake today is 19°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 | 21.1°C | 21.2°C | |
| SEP 15 | 20.7°C | 21.2°C | |
| SEP 16 | 19.9°C | 21.2°C | |
| SEP 17 | 19.8°C | 21.2°C | |
| SEP 18 | 19.1°C | 21.2°C | |
| SEP 19 | 19.2°C | 21.2°C | |
| SEP 20 | 19.2°C | 21.2°C | |
| SEP 21 | 19.0°C | 21.2°C | |
| SEP 22 | 21.2°C | 19.1°C | |
| SEP 23 | 21.2°C | 19.2°C | |
| SEP 24 | 21.2°C | 19.3°C | |
| SEP 25 | 21.2°C | 19.4°C | |
| SEP 26 | 21.2°C | 19.6°C | |
| SEP 27 | 21.2°C | 19.7°C | |
| SEP 28 | 21.2°C | 19.8°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 | 1°C | 4°C |
| February | 0°C | 2°C | 4°C |
| March | 0°C | 2°C | 4°C |
| April | 2°C | 7°C | 13°C |
| May | 9°C | 15°C | 21°C |
| June | 16°C | 22°C | 27°C |
| July | 21°C | 24°C | 28°C |
| August | 20°C | 25°C | 30°C |
| September | 18°C | 21°C | 25°C |
| October | 6°C | 13°C | 19°C |
| November | 2°C | 8°C | 12°C |
| December | 1°C | 3°C | 6°C |
Wapogasset Lake: Water Temperature by Location
Wapogasset Lake: Weather Forecast
September 22
September 23
September 24
September 25
Location & Local Information
Wapogasset Lake in Wisconsin typically follows seasonal patterns common to inland lakes in the region. In winter the surface usually approaches freezing, around 32°F (0°C) or colder under ice, and the lake is commonly ice-covered for several months. Spring temperatures rise but remain cool, generally from about 40–60°F (4–15°C) as snowmelt and runoff continue to cool the water. During summer, surface temperatures often reach the most comfortable range for swimming, commonly about 70–78°F (21–26°C) and occasionally into the low 80s°F (≈27–28°C) on hot, calm days; deeper layers remain noticeably cooler due to stratification. In autumn the water cools again, typically falling into the 50–65°F (10–18°C) range before refreezing.
Swimming at Wapogasset Lake is generally possible and practiced during the ice-free months because surface temperatures in summer are warm enough for recreational use. Access and specific rules depend on whether areas are public beaches or private shorelines, and water-quality issues such as algal blooms or bacterial advisories can temporarily limit swimming. Cold spring and late-fall water increases the risk of cold-shock or hypothermia, and winter ice cover makes swimming unsafe and usually prohibited. Visitors should check local advisories and exercise standard water-safety precautions.