Lake Saint Helen — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Lake Saint Helen, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Lake Saint Helen today is 20.5°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 |
|---|---|---|---|
| AUG 25 | 22.4°C | 24.0°C | |
| AUG 26 | 22.3°C | 24.0°C | |
| AUG 27 | 21.4°C | 24.0°C | |
| AUG 28 | 21.2°C | 24.0°C | |
| AUG 29 | 21.2°C | 24.0°C | |
| AUG 30 | 21.2°C | 24.0°C | |
| AUG 31 | 21.0°C | 24.0°C | |
| SEP 1 | 20.5°C | 22.0°C | |
| SEP 2 | 22.0°C | 20.6°C | |
| SEP 3 | 22.0°C | 20.7°C | |
| SEP 4 | 22.0°C | 20.7°C | |
| SEP 5 | 22.0°C | 20.8°C | |
| SEP 6 | 22.0°C | 20.9°C | |
| SEP 7 | 22.0°C | 21.0°C | |
| SEP 8 | 22.0°C | 21.0°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 | 3°C | 6°C |
| February | 0°C | 2°C | 5°C |
| March | 1°C | 4°C | 7°C |
| April | 2°C | 6°C | 10°C |
| May | 8°C | 13°C | 18°C |
| June | 14°C | 19°C | 24°C |
| July | 19°C | 23°C | 27°C |
| August | 20°C | 24°C | 28°C |
| September | 17°C | 22°C | 27°C |
| October | 11°C | 15°C | 19°C |
| November | 3°C | 7°C | 11°C |
| December | 0°C | 3°C | 7°C |
Lake Saint Helen: Water Temperature by Location
Lake Saint Helen: Weather Forecast
September 2
September 3
September 4
September 5
September 6
Location & Local Information
Lake Saint Helen’s water temperatures follow a typical inland Michigan pattern: cold in spring, warmest in mid to late summer, and often frozen or near-freezing in winter. In early spring surface readings commonly sit around 40–60°F (4–16°C) as snowmelt and runoff cool the lake. By June through August the surface usually warms to roughly 70–80°F (21–27°C) on sunny, calm days, though shallower bays can be warmer and deeper spots cooler. In autumn temperatures decline back through the 50–70°F range (10–21°C) before ice formation brings surface water to about 32°F (0°C) and solid ice in sustained cold. Local weather, wind, and lake depth influence these values and the lake often stratifies in summer, so temperature can vary with depth.
Swimming is generally possible and commonly practiced during the ice-free months because surface temperatures rise to comfortable levels and shorelines are accessible. Many residents and visitors swim from beaches, docks, or private frontage when water is above roughly 70°F (21°C), though some tolerate cooler water for short periods. Swimming is not safe in winter when ice is thin or absent without proper ice safety; hypothermia risk and hidden hazards make cold-season immersion dangerous. As with any lake outing, local advisories about water quality, currents, and signage should be observed before entering the water.