Mantrap Lake — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Mantrap Lake, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Mantrap 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 | 16.2°C | 17.6°C | |
| JUN 4 | 16.2°C | 17.6°C | |
| JUN 5 | 16.2°C | 17.6°C | |
| JUN 6 | 16.5°C | 17.6°C | |
| JUN 7 | 16.8°C | 17.6°C | |
| JUN 8 | 17.0°C | 17.6°C | |
| JUN 10 | 18.7°C | 17.6°C | |
| JUN 11 | 17.6°C | 18.6°C | |
| JUN 12 | 17.6°C | 18.6°C | |
| JUN 13 | 17.6°C | 18.5°C | |
| JUN 14 | 17.6°C | 18.5°C | |
| JUN 15 | 17.6°C | 18.4°C | |
| JUN 16 | 17.6°C | 18.4°C | |
| JUN 17 | 17.6°C | 18.3°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 | 0°C | 7°C | 12°C |
| February | 0°C | 8°C | 15°C |
| March | 0°C | 9°C | 17°C |
| April | 1°C | 11°C | 20°C |
| May | 3°C | 12°C | 21°C |
| June | 13°C | 18°C | 22°C |
| July | 17°C | 19°C | 22°C |
| August | 21°C | 25°C | 28°C |
| September | 16°C | 19°C | 22°C |
| October | 5°C | 12°C | 18°C |
| November | 1°C | 6°C | 11°C |
| December | 0°C | 4°C | 6°C |
Mantrap Lake: Water Temperature by Location
Mantrap Lake: Weather Forecast
June 9
June 10
June 11
June 12
June 13
Location & Local Information
Mantrap Lake in Minnesota follows the typical northern-lake seasonal pattern for water temperature. In spring, after ice-out, surface temperatures commonly sit between about 40–55 °F (4–13 °C) as the water slowly warms. By summer, surface water in open areas and shallow bays often rises to roughly 68–75 °F (20–24 °C), and in warm late-summer spells some sheltered shallows can approach the upper 70s to around 80 °F (25–27 °C). In autumn the lake cools back down through the 50s to low 60s °F (10–17 °C) before freezing; during winter the lake surface is near freezing, typically around 32–39 °F (0–4 °C) beneath ice cover.
Swimming in Mantrap Lake is generally allowed where public access exists, and many people swim there during the warmer summer months because temperatures are usually comfortable for recreational swimming. That said, swimming is seasonally constrained: water remains quite cold in spring and late fall, and ice cover in winter makes swimming unsafe. Local regulations, posted advisories, and water-quality reports should be checked before entering the water, and swimmers should be mindful that there are typically no lifeguards and that conditions can change with wind, depth, and weather.