Serpent Lake — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Serpent Lake, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Serpent Lake today is 18.7°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 |
|---|---|---|---|
| JUN 3 | 18.6°C | 19.5°C | |
| JUN 4 | 18.6°C | 19.5°C | |
| JUN 5 | 18.6°C | 19.5°C | |
| JUN 6 | 18.1°C | 19.5°C | |
| JUN 7 | 18.4°C | 19.5°C | |
| JUN 8 | 18.5°C | 19.5°C | |
| JUN 10 | 18.7°C | 19.5°C | |
| JUN 11 | 19.5°C | 18.7°C | |
| JUN 12 | 19.5°C | 18.8°C | |
| JUN 13 | 19.5°C | 18.8°C | |
| JUN 14 | 19.5°C | 18.9°C | |
| JUN 15 | 19.5°C | 18.9°C | |
| JUN 16 | 19.5°C | 18.9°C | |
| JUN 17 | 19.5°C | 19.0°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 | 6°C | 10°C |
| May | 8°C | 14°C | 19°C |
| June | 12°C | 20°C | 27°C |
| July | 20°C | 24°C | 27°C |
| August | 21°C | 25°C | 28°C |
| September | 17°C | 20°C | 23°C |
| October | 6°C | 12°C | 18°C |
| November | 3°C | 7°C | 11°C |
| December | 1°C | 3°C | 6°C |
Serpent Lake: Water Temperature by Location
Serpent Lake: Weather Forecast
June 9
June 10
June 11
June 12
June 13
Location & Local Information
Serpent Lake in Minnesota experiences a wide annual swing in water temperature. In winter the surface typically freezes and stays near 32°F (0°C). Spring brings a thaw with surface temperatures climbing from roughly the mid-30s up toward 60°F (about 2–15.5°C) as the season progresses. Summer is when the lake is warmest at the surface, commonly reaching the high 60s to upper 70s Fahrenheit (about 20–26°C) on warm days; deeper water remains noticeably cooler and a thermocline can form. In autumn the surface cools again, often falling back into the 40s–60°F range (roughly 4–15.5°C) before ice returns.
Swimming in Serpent Lake is generally possible during the open-water months because surface temperatures in late spring through early fall frequently reach levels comfortable for recreation. Public access points and beaches often see swimmers from late May through September, though exact timing depends on annual weather. Local advisories, such as for harmful algal blooms or bacterial contamination, can restrict or discourage swimming, and ice conditions in winter make swimming unsafe. Cooler water below about 60°F (15°C) can reduce comfort and endurance and increases cold-shock risk, so swimmers should heed posted notices, be prepared for variable conditions, and use appropriate thermal protection if venturing into colder water.