Black Water Lake — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Black Water Lake, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Black Water Lake today is 16.9°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
⚠️ As of today, the minimum water temperature ranges from 60°F (15°C) to 65°F (18°C). The water is comfortable for most people, making it an ideal range for water sports enthusiasts. The temperature does not cause significant discomfort, and swimming will be pleasant for the majority. However, it's important to remember that prolonged exposure to the water can still lead to cooling, so it's essential to monitor the time spent in the water, especially for children or elderly people. 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 | 19.5°C | 19.0°C | |
| SEP 15 | 18.4°C | 19.0°C | |
| SEP 16 | 18.3°C | 19.0°C | |
| SEP 17 | 17.8°C | 19.0°C | |
| SEP 18 | 17.2°C | 19.0°C | |
| SEP 19 | 17.1°C | 19.0°C | |
| SEP 20 | 16.5°C | 19.0°C | |
| SEP 22 | 19.0°C | 17.0°C | |
| SEP 23 | 19.0°C | 17.1°C | |
| SEP 24 | 19.0°C | 17.2°C | |
| SEP 25 | 19.0°C | 17.3°C | |
| SEP 26 | 19.0°C | 17.4°C | |
| SEP 27 | 19.0°C | 17.5°C | |
| SEP 28 | 19.0°C | 17.6°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 | 1°C | 7°C | 12°C |
| February | 2°C | 9°C | 15°C |
| March | 1°C | 9°C | 17°C |
| April | 1°C | 11°C | 20°C |
| May | 6°C | 14°C | 21°C |
| June | 15°C | 19°C | 22°C |
| July | 17°C | 21°C | 26°C |
| August | 21°C | 25°C | 28°C |
| September | 16°C | 19°C | 22°C |
| October | 5°C | 12°C | 18°C |
| November | 4°C | 8°C | 11°C |
| December | 4°C | 8°C | 11°C |
Black Water Lake: Water Temperature by Location
Black Water Lake: Weather Forecast
September 22
September 23
September 24
September 25
Location & Local Information
Black Water Lake in Minnesota exhibits the seasonal temperature pattern typical of northern lakes. In spring, after ice-out, surface temperatures commonly range from about 34–58°F (1–14°C) as the water gradually warms. During summer the surface usually reaches about 65–78°F (18–26°C), with sunnier, shallow bays occasionally climbing toward 80°F (27°C) on hot days. By early fall the lake begins cooling, with surface readings often around 50–60°F (10–16°C) depending on weather. In winter the lake typically freezes over; the ice surface is at 32°F (0°C) while the water beneath the ice often stabilizes near 34–39°F (1–4°C).
Swimming is generally possible during the ice‑free months when water temperatures are comfortable and no health advisories are in effect, because the lake is accessible for recreational use. However, swimming is unsafe or prohibited when the lake is frozen, when local authorities post water‑quality or blue‑green‑algae warnings, or near hazardous shorelines. Even in summer, colder spring and late‑fall water can cause cold‑shock risk, and swimmers should be mindful of sudden depth changes and water quality notices issued by local authorities before entering the water.