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 18.6°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 | 17.1°C | 18.5°C | |
| JUN 4 | 17.2°C | 18.5°C | |
| JUN 5 | 17.1°C | 18.5°C | |
| JUN 6 | 17.7°C | 18.5°C | |
| JUN 7 | 18.2°C | 18.5°C | |
| JUN 8 | 18.4°C | 18.5°C | |
| JUN 10 | 18.6°C | 18.5°C | |
| JUN 11 | 18.5°C | 18.6°C | |
| JUN 12 | 18.5°C | 18.6°C | |
| JUN 13 | 18.5°C | 18.6°C | |
| JUN 14 | 18.5°C | 18.6°C | |
| JUN 15 | 18.5°C | 18.6°C | |
| JUN 16 | 18.5°C | 18.6°C | |
| JUN 17 | 18.5°C | 18.6°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 | 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 | 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
June 9
June 10
June 11
June 12
June 13
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.