Bear Island Lake — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Bear Island Lake, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Bear Island Lake today is 19.2°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 | 14.1°C | 18.0°C | |
| JUN 4 | 14.0°C | 18.0°C | |
| JUN 5 | 14.7°C | 18.0°C | |
| JUN 6 | 15.2°C | 18.0°C | |
| JUN 7 | 15.8°C | 18.0°C | |
| JUN 8 | 19.2°C | 18.0°C | |
| JUN 11 | 18.0°C | 19.1°C | |
| JUN 12 | 18.0°C | 19.1°C | |
| JUN 13 | 18.0°C | 19.0°C | |
| JUN 14 | 18.0°C | 19.0°C | |
| JUN 15 | 18.0°C | 18.9°C | |
| JUN 16 | 18.0°C | 18.8°C | |
| JUN 17 | 18.0°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 | 3°C |
| February | 0°C | 1°C | 3°C |
| March | 0°C | 1°C | 3°C |
| April | 1°C | 4°C | 7°C |
| May | 3°C | 10°C | 16°C |
| June | 14°C | 18°C | 21°C |
| July | 19°C | 23°C | 27°C |
| August | 17°C | 24°C | 30°C |
| September | 14°C | 16°C | 19°C |
| October | 9°C | 13°C | 17°C |
| November | 2°C | 7°C | 11°C |
| December | 0°C | 2°C | 4°C |
Bear Island Lake: Water Temperature by Location
Bear Island Lake: Weather Forecast
June 9
June 10
June 11
June 12
June 13
Location & Local Information
Bear Island Lake in Minnesota follows the familiar seasonal rhythm of northern lakes, with water temperatures that change markedly through the year. After ice-out in spring, surface temperatures are commonly in the 40s to mid-50s °F (4–13 °C) and gradually warm into early summer. By July and August, typical surface readings for recreational areas often range from about 65–75 °F (18–24 °C), though shallow bays and warm spells can push parts of the lake into the upper 70s or low 80s °F (25–28 °C). As autumn arrives the lake cools back down through the 50s °F (10–15 °C) and eventually refreezes; under ice in winter the water remains just above freezing, roughly in the low 30s to near 39 °F (0–4 °C) near the bottom.
Swimming in Bear Island Lake is generally possible and commonly done during the warm summer months when surface temperatures are most comfortable. Access and use depend on shoreline ownership and any local rules, and swimmers should heed posted advisories about water quality (for example, algal blooms or bacterial concerns) and watch for cold-water shock in shoulder seasons when temperatures are still low. Ice swimming or entering near-freezing water carries significant hypothermia risk and should be avoided without proper training and safety precautions.