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 28°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
✅ As of today, the minimum water temperature ranges from 79°F (26°C) to 82°F (28°C). This is very warm water, allowing for extended stays without any discomfort. Swimming in these conditions will be particularly enjoyable, making it the ideal temperature range for those who want to relax in the sea. Additionally, water in this temperature range is suitable for children and elderly people, as it is comfortable for prolonged stays. 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 | 28.3°C | 28.3°C | |
| SEP 15 | 28.3°C | 28.3°C | |
| SEP 16 | 28.2°C | 28.3°C | |
| SEP 17 | 28.1°C | 28.3°C | |
| SEP 18 | 28.1°C | 28.3°C | |
| SEP 19 | 28.4°C | 28.3°C | |
| SEP 20 | 28.0°C | 28.3°C | |
| SEP 21 | 28.0°C | 28.3°C | |
| SEP 22 | 28.3°C | 28.0°C | |
| SEP 23 | 28.3°C | 28.0°C | |
| SEP 24 | 28.3°C | 28.0°C | |
| SEP 25 | 28.3°C | 28.1°C | |
| SEP 26 | 28.3°C | 28.1°C | |
| SEP 27 | 28.3°C | 28.1°C | |
| SEP 28 | 28.3°C | 28.1°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
September 21
September 22
September 23
September 24
September 25
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.