Deer Lake — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Deer Lake, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Deer Lake today is 22.5°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
✅ As of today, the minimum water temperature ranges from 68°F (20°C) to 74°F (23°C). The water is warm and pleasant for swimming, and in this range, one can stay in the water for extended periods without the risk of hypothermia. This is the ideal temperature for relaxation, swimming, and water sports. Families with children, as well as outdoor enthusiasts, will enjoy swimming and time spent in the water. For most people, this is the optimal temperature for a comfortable beach experience. 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 |
|---|---|---|---|
| JUN 3 | 18.2°C | 21.0°C | |
| JUN 4 | 18.2°C | 21.0°C | |
| JUN 5 | 18.2°C | 21.0°C | |
| JUN 6 | 18.5°C | 21.0°C | |
| JUN 7 | 18.7°C | 21.0°C | |
| JUN 8 | 22.2°C | 21.0°C | |
| JUN 10 | 22.5°C | 21.0°C | |
| JUN 11 | 21.0°C | 22.4°C | |
| JUN 12 | 21.0°C | 22.4°C | |
| JUN 13 | 21.0°C | 22.3°C | |
| JUN 14 | 21.0°C | 22.2°C | |
| JUN 15 | 21.0°C | 22.1°C | |
| JUN 16 | 21.0°C | 22.1°C | |
| JUN 17 | 21.0°C | 22.0°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 | 10°C | 15°C | 20°C |
| June | 15°C | 21°C | 27°C |
| July | 18°C | 23°C | 27°C |
| August | 19°C | 24°C | 28°C |
| September | 18°C | 21°C | 23°C |
| October | 6°C | 13°C | 19°C |
| November | 2°C | 7°C | 11°C |
| December | 1°C | 3°C | 6°C |
Deer Lake: Water Temperature by Location
Deer Lake: Weather Forecast
June 9
June 10
June 11
June 12
June 13
Location & Local Information
Deer Lake in Wisconsin follows the typical seasonal patterns of small northern lakes. In spring, as ice melts, surface temperatures usually range from about 40–60°F (4–16°C) as the water slowly warms. Peak summer surface temperatures commonly sit between roughly 68–78°F (20–26°C) in deeper, open water and can climb into the upper 70s or around 80°F (about 27°C) in shallow, sheltered bays on hot afternoons. During fall the lake cools again, with surface readings often falling to about 50–60°F (10–16°C) as the season progresses. In winter the lake will usually be at or just above freezing under ice, near 32–39°F (0–4°C), when ice cover is present.
Swimming at Deer Lake is generally possible during the ice‑free months because summer and late‑spring temperatures reach levels that are comfortable for recreational bathing. There may be boat traffic, aquatic plants, or occasional algae that affect conditions, and local authorities can post advisories for water quality or safety, so swimmers should heed signage and seasonal rules. In winter, open‑water swimming is not recommended because of ice and near‑freezing temperatures; ice‑related activities require appropriate safety precautions and local guidance.