Lake Washington — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Lake Washington, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Lake Washington today is 29.7°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
✅ As of today, the minimum water temperature is above 82°F (28°C). This is very warm water, which may feel almost hot to most people. Swimming in such conditions is perfect for those seeking relaxation and comfort in the water. These waters are often preferred for relaxation in hot weather, as the water temperature does not cool the body significantly. However, it is important to remember that in such warm waters, caution is necessary, as prolonged exposure without rest can lead to overheating. 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 | 27.8°C | 29.5°C | |
| JUN 4 | 27.5°C | 29.5°C | |
| JUN 5 | 27.4°C | 29.5°C | |
| JUN 6 | 27.4°C | 29.5°C | |
| JUN 7 | 28.1°C | 29.5°C | |
| JUN 8 | 28.1°C | 29.5°C | |
| JUN 10 | 28.1°C | 29.5°C | |
| JUN 11 | 29.5°C | 29.7°C | |
| JUN 12 | 29.5°C | 29.7°C | |
| JUN 13 | 29.5°C | 29.7°C | |
| JUN 14 | 29.5°C | 29.7°C | |
| JUN 15 | 29.5°C | 29.7°C | |
| JUN 16 | 29.5°C | 29.6°C | |
| JUN 17 | 29.5°C | 29.6°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 | 16°C | 19°C | 22°C |
| February | 16°C | 19°C | 23°C |
| March | 18°C | 21°C | 25°C |
| April | 21°C | 24°C | 27°C |
| May | 22°C | 26°C | 30°C |
| June | 27°C | 30°C | 32°C |
| July | 27°C | 32°C | 36°C |
| August | 27°C | 30°C | 33°C |
| September | 26°C | 28°C | 31°C |
| October | 24°C | 27°C | 30°C |
| November | 21°C | 23°C | 26°C |
| December | 17°C | 21°C | 25°C |
Lake Washington: Water Temperature by Location
Lake Washington: Weather Forecast
June 9
June 10
June 11
June 12
Location & Local Information
Lake Washington in Florida typically has warm surface waters compared with northern lakes, with seasonal variation driven by air temperature, depth and sunlight. In summer months surface temperatures commonly range from about 78–88°F (26–31°C), and on very hot spells can approach or exceed 90°F (32°C). During spring and fall the lake often sits around 68–78°F (20–26°C), while winter surface readings commonly drop to roughly 55–66°F (13–19°C). Deeper or shaded areas will be cooler than shallow, sun-exposed bays, and short-term shifts in temperature occur after cold fronts or prolonged rain.
Swimming in Lake Washington is generally possible because it is a public freshwater body, but whether people should enter the water depends on local rules and conditions. There are no widespread designated supervised beaches on the lake, and advisories can close swimming for reasons such as harmful algal blooms, high bacterial counts or boating traffic. Natural hazards—submerged vegetation, uneven bottom, and native wildlife such as alligators—also influence safety. Visitors are advised to check current water-quality notices from local authorities, avoid swimming at night, and take usual precautions when choosing to swim in an unmanaged freshwater lake.