Gervais Lake — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Gervais Lake, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Gervais Lake today is 18.6°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 | 21.6°C | 21.6°C | |
| SEP 15 | 21.3°C | 21.6°C | |
| SEP 16 | 20.3°C | 21.6°C | |
| SEP 17 | 18.3°C | 21.6°C | |
| SEP 18 | 18.5°C | 21.6°C | |
| SEP 19 | 18.7°C | 21.6°C | |
| SEP 20 | 19.1°C | 21.6°C | |
| SEP 21 | 18.6°C | 21.6°C | |
| SEP 22 | 21.6°C | 18.8°C | |
| SEP 23 | 21.6°C | 18.9°C | |
| SEP 24 | 21.6°C | 19.1°C | |
| SEP 25 | 21.6°C | 19.2°C | |
| SEP 26 | 21.6°C | 19.4°C | |
| SEP 27 | 21.6°C | 19.5°C | |
| SEP 28 | 21.6°C | 19.7°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 | 3°C | 8°C | 14°C |
| May | 10°C | 16°C | 22°C |
| June | 16°C | 22°C | 27°C |
| July | 22°C | 25°C | 28°C |
| August | 20°C | 24°C | 29°C |
| September | 18°C | 22°C | 26°C |
| October | 6°C | 13°C | 19°C |
| November | 3°C | 8°C | 12°C |
| December | 1°C | 3°C | 6°C |
Gervais Lake: Water Temperature by Location
Gervais Lake: Weather Forecast
September 21
September 22
September 23
September 24
September 25
September 26
Location & Local Information
There is limited publicly available, site-specific temperature monitoring for Gervais Lake, so reported values vary with depth, weather and year. Generally, small to mid-size lakes in Minnesota warm from spring lows of roughly 40–60°F (4–16°C) in April–May, reach their warmest in mid to late summer with surface temperatures commonly between 65–80°F (18–27°C), then cool through the fall to about 50–60°F (10–16°C). In winter, when lakes are ice-covered, the water just beneath the ice typically stays near 32–39°F (0–4°C). Shallow bays and sun-exposed areas will be warmer in summer and will cool and freeze earlier in fall and winter.
Swimming at Gervais Lake is generally possible during the warmer months when surface temperatures rise into the comfortable range (often above about 70°F / 21°C), but local rules, beach facilities and water-quality advisories determine whether public swimming is allowed or recommended. Visitors should observe posted signs and health advisories because algal blooms, bacterial exceedances, or boater traffic can prompt temporary closures. Cold spring and autumn water presents a risk of cold-water shock and hypothermia, and winter activity requires ice-safety checks; therefore, practical access to safe swimming depends on current conditions and local management.