South Manistique Lake — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in South Manistique Lake, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in South Manistique Lake today is 20.2°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 23 | 18.2°C | 17.4°C | |
| JUN 24 | 18.1°C | 17.4°C | |
| JUN 25 | 18.0°C | 17.4°C | |
| JUN 26 | 17.9°C | 17.4°C | |
| JUN 27 | 17.9°C | 17.4°C | |
| JUN 28 | 19.3°C | 17.4°C | |
| JUN 29 | 19.8°C | 17.4°C | |
| JUN 30 | 20.2°C | 17.4°C | |
| JUL 1 | 20.5°C | 20.2°C | |
| JUL 2 | 20.5°C | 20.2°C | |
| JUL 3 | 20.5°C | 20.2°C | |
| JUL 4 | 20.5°C | 20.3°C | |
| JUL 5 | 20.5°C | 20.3°C | |
| JUL 6 | 20.5°C | 20.3°C | |
| JUL 7 | 20.5°C | 20.3°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 | 3°C | 5°C | 7°C |
| February | 3°C | 6°C | 8°C |
| March | 0°C | 3°C | 7°C |
| April | 4°C | 8°C | 12°C |
| May | 6°C | 15°C | 23°C |
| June | 12°C | 17°C | 22°C |
| July | 16°C | 21°C | 25°C |
| August | 19°C | 23°C | 27°C |
| September | 12°C | 16°C | 20°C |
| October | 11°C | 15°C | 18°C |
| November | 0°C | 6°C | 11°C |
| December | 0°C | 3°C | 6°C |
South Manistique Lake: Water Temperature by Location
South Manistique Lake: Weather Forecast
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Location & Local Information
South Manistique Lake, located in Michigan’s Upper Peninsula, experiences a pronounced seasonal cycle in water temperature. Typical winter conditions bring surface temperatures down near freezing (about 32°F / 0°C) with sustained ice cover on much of the lake. In spring the surface warms from roughly 35–55°F (2–13°C) as ice melts and runoff cools the water. By late spring and early summer the upper layer usually reaches 55–68°F (13–20°C), and peak summer surface temperatures commonly sit in the 65–75°F (18–24°C) range, occasionally rising a few degrees higher during extended heat. As autumn arrives the surface cools back toward the 50–60°F (10–16°C) band before refreezing in winter. Deeper water remains substantially colder year-round, so temperatures can vary sharply with depth.
Swimming is generally permitted and commonly practiced during the warm months because South Manistique Lake is used for recreation and has public access points and private shoreline properties. The main swimming season is typically mid-June through August when surface temperatures are most comfortable; spring and fall swims can be chilly and carry hypothermia risk, and winter conditions prevent ordinary swimming except for organized ice plunges. Swimmers should be mindful of changing temperatures with depth, local water-quality or safety advisories, submerged hazards, and boat traffic when choosing where and when to enter the water.