Black Lake — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Black Lake, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Black Lake today is 21.8°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
✅ As of today, the minimum water temperature ranges from 68°F (20°C) to 74°F (23°C). The water is warm and pleasant for swimming, and in this range, one can stay in the water for extended periods without the risk of hypothermia. This is the ideal temperature for relaxation, swimming, and water sports. Families with children, as well as outdoor enthusiasts, will enjoy swimming and time spent in the water. For most people, this is the optimal temperature for a comfortable beach experience. 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 |
|---|---|---|---|
| AUG 24 | 21.6°C | 24.5°C | |
| AUG 25 | 21.7°C | 24.5°C | |
| AUG 26 | 21.7°C | 24.5°C | |
| AUG 27 | 21.7°C | 24.5°C | |
| AUG 28 | 21.7°C | 24.5°C | |
| AUG 29 | 22.0°C | 24.5°C | |
| AUG 30 | 22.0°C | 24.5°C | |
| AUG 31 | 21.7°C | 24.5°C | |
| SEP 1 | 21.5°C | 21.8°C | |
| SEP 2 | 21.5°C | 21.8°C | |
| SEP 3 | 21.5°C | 21.8°C | |
| SEP 4 | 21.5°C | 21.7°C | |
| SEP 5 | 21.5°C | 21.7°C | |
| SEP 6 | 21.5°C | 21.7°C | |
| SEP 7 | 21.5°C | 21.7°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 | 0°C | 3°C | 6°C |
| February | 2°C | 5°C | 8°C |
| March | 3°C | 7°C | 11°C |
| April | 6°C | 11°C | 15°C |
| May | 12°C | 17°C | 21°C |
| June | 13°C | 19°C | 24°C |
| July | 16°C | 24°C | 31°C |
| August | 19°C | 25°C | 30°C |
| September | 17°C | 22°C | 26°C |
| October | 12°C | 16°C | 20°C |
| November | 7°C | 11°C | 14°C |
| December | 3°C | 7°C | 9°C |
Black Lake: Water Temperature by Location
Black Lake: Weather Forecast
September 1
September 2
September 3
September 4
September 5
September 6
Location & Local Information
Black Lake in Washington typically experiences cool water year-round compared with more temperate regions. In spring the surface often sits around 45–60°F (7–16°C) as meltwater and seasonal rains keep temperatures low. By late summer, especially in shallow, sheltered bays, surface readings commonly warm to about 68–75°F (20–24°C) on sunny days, though deeper or wind-exposed parts may remain cooler in the 60s°F (15–18°C). During fall the lake cools back through the 50s to 40s°F (10–7°C), and winter surface temperatures can approach the mid-30s to low-40s°F (1–6°C) where ice is uncommon but water is very cold. These are typical seasonal ranges; exact temperatures vary with weather, wind, and depth.
Swimming is generally permitted in public access areas of Black Lake, and people swim there in summer when surface temperatures are warmest. However, it is not supervised by lifeguards, and water quality or algal blooms can lead to temporary advisories, so swimmers should heed posted signs and local guidance. The relatively cool shoulder-season and winter temperatures make prolonged immersion uncomfortable and increase risk of cold-water shock, so recreational swimming is most common and safest in the warmest late-summer weeks and with usual precautions such as swimming with a companion.