Blackduck Lake — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Blackduck Lake, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Blackduck Lake today is 11.8°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
❌ As of today, the minimum water temperature ranges from 50°F (10°C) to 54°F (12°C). The water is slightly warmer, but still cool for most people. Swimming in such conditions is possible, but for most people, the time spent in the water should be limited to avoid hypothermia. Even experienced swimmers may feel discomfort if they stay in the water for too long. To improve comfort and safety, a wetsuit can be used. 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 |
|---|---|---|---|
| OCT 5 | 13.3°C | 11.5°C | |
| OCT 6 | 13.3°C | 11.5°C | |
| OCT 7 | 12.4°C | 11.5°C | |
| OCT 8 | 12.5°C | 11.5°C | |
| OCT 9 | 12.4°C | 11.5°C | |
| OCT 10 | 12.0°C | 11.5°C | |
| OCT 11 | 10.2°C | 11.5°C | |
| OCT 12 | 10.4°C | 11.5°C | |
| OCT 13 | 11.5°C | 11.8°C | |
| OCT 14 | 11.5°C | 11.8°C | |
| OCT 15 | 11.5°C | 11.8°C | |
| OCT 16 | 11.5°C | 11.7°C | |
| OCT 17 | 11.5°C | 11.7°C | |
| OCT 18 | 11.5°C | 11.7°C | |
| OCT 19 | 11.5°C | 11.7°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 | 2°C | 7°C | 12°C |
| February | 2°C | 9°C | 15°C |
| March | 0°C | 9°C | 17°C |
| April | 1°C | 11°C | 20°C |
| May | 2°C | 12°C | 21°C |
| June | 13°C | 18°C | 22°C |
| July | 17°C | 21°C | 26°C |
| August | 20°C | 25°C | 28°C |
| September | 16°C | 19°C | 22°C |
| October | 5°C | 12°C | 18°C |
| November | 2°C | 7°C | 11°C |
| December | 2°C | 7°C | 11°C |
Blackduck Lake: Water Temperature by Location
Blackduck Lake: Weather Forecast
October 13
October 14
October 15
October 16
October 17
Location & Local Information
Blackduck Lake in northern Minnesota follows the typical seasonal pattern for small inland lakes in the region. Surface temperatures in spring are usually cold, roughly 40–60°F (4–16°C) as the water mixes and warms after ice-out. In summer the lake commonly reaches its warmest range, about 65–80°F (18–27°C) on the surface on sunny days, with warmer, shallower bays often a few degrees higher. By fall the lake cools back to roughly 50–65°F (10–18°C) as air temperatures drop and stratification breaks down. In winter the lake freezes or stays very near 32°F (0°C), so open water temperatures are not applicable until ice-out.
Swimming is generally permitted during the open-water season and is a common recreational use when conditions are safe. Local rules, posted signs, and water-quality reports should be checked first, because harmful algal blooms or bacterial advisories can temporarily close areas. There are also typical safety considerations: cold spring water can produce cold-shock risk, and there are no guarantees of lifeguards or maintained beaches at every access point. Winter ice-covered periods are not suitable for conventional swimming, although some organized ice-swim events occur under controlled, supervised conditions.