Long Lake — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Long Lake, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Long Lake today is 17.4°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 | 19.4°C | 21.5°C | |
| SEP 15 | 19.3°C | 21.5°C | |
| SEP 16 | 18.4°C | 21.5°C | |
| SEP 17 | 18.3°C | 21.5°C | |
| SEP 18 | 18.3°C | 21.5°C | |
| SEP 19 | 18.5°C | 21.5°C | |
| SEP 20 | 18.0°C | 21.5°C | |
| SEP 21 | 17.4°C | 21.5°C | |
| SEP 22 | 21.5°C | 17.6°C | |
| SEP 23 | 21.5°C | 17.8°C | |
| SEP 24 | 21.5°C | 18.0°C | |
| SEP 25 | 21.5°C | 18.2°C | |
| SEP 26 | 21.5°C | 18.4°C | |
| SEP 27 | 21.5°C | 18.6°C | |
| SEP 28 | 21.5°C | 18.8°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 | 5°C |
| March | 1°C | 3°C | 6°C |
| April | 2°C | 6°C | 10°C |
| May | 5°C | 12°C | 19°C |
| June | 12°C | 18°C | 24°C |
| July | 17°C | 22°C | 27°C |
| August | 18°C | 23°C | 28°C |
| September | 16°C | 22°C | 27°C |
| October | 12°C | 16°C | 19°C |
| November | 3°C | 8°C | 12°C |
| December | 0°C | 3°C | 5°C |
Long Lake: Water Temperature by Location
Long Lake: Weather Forecast
September 22
September 23
September 24
September 25
Location & Local Information
Long Lake in Michigan experiences a wide range of water temperatures over the year. In early spring the surface water typically runs cold, roughly 40–55°F (4–13°C) as snowmelt and cool air dominate. By early to mid-summer surface temperatures commonly warm to about 70–80°F (21–27°C) on sunny days, with the warmest, shallow bays often reaching the upper end of that scale. During fall the lake cools again, with surface readings falling into the 50–65°F (10–18°C) range as air temperatures drop. In winter the lake will approach and often fall below freezing at the surface, around 32°F (0°C), and many Michigan lakes develop significant ice cover; water beneath the ice remains a few degrees above freezing, typically near 34–39°F (1–4°C).
Swimming in Long Lake is generally permitted and popular during the warmer months because summer surface temperatures are comfortable for recreation. However, swimmers should be mindful of seasonal limitations: cold spring and fall waters can cause rapid heat loss and increase the risk of hypothermia, while winter conditions and ice prohibit conventional swimming and create hazards. Local access points, public beaches, lifeguard presence, and water-quality advisories determine safe swimming opportunities, so checking current conditions and following posted guidance is advisable.