Bellevue — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Bellevue, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Bellevue today is 18.2°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 |
|---|---|---|---|
| SEP 14 | 19.0°C | 16.5°C | |
| SEP 15 | 18.7°C | 16.5°C | |
| SEP 16 | 18.1°C | 16.5°C | |
| SEP 17 | 18.3°C | 16.5°C | |
| SEP 18 | 18.0°C | 16.5°C | |
| SEP 19 | 18.5°C | 16.5°C | |
| SEP 20 | 18.4°C | 16.5°C | |
| SEP 21 | 18.2°C | 16.5°C | |
| SEP 22 | 16.5°C | 18.1°C | |
| SEP 23 | 16.5°C | 18.0°C | |
| SEP 24 | 16.5°C | 17.9°C | |
| SEP 25 | 16.5°C | 17.9°C | |
| SEP 26 | 16.5°C | 17.8°C | |
| SEP 27 | 16.5°C | 17.7°C | |
| SEP 28 | 16.5°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 | 3°C | 4°C | 9°C |
| February | 3°C | 5°C | 9°C |
| March | 3°C | 7°C | 11°C |
| April | 5°C | 10°C | 16°C |
| May | 8°C | 13°C | 21°C |
| June | 14°C | 19°C | 22°C |
| July | 15°C | 20°C | 25°C |
| August | 17°C | 21°C | 25°C |
| September | 11°C | 17°C | 22°C |
| October | 8°C | 13°C | 17°C |
| November | 3°C | 8°C | 16°C |
| December | 3°C | 6°C | 8°C |
Bellevue: Weather Forecast
September 21
September 22
September 23
September 24
September 25
Location & Local Information
Bellevue, Washington, is located in the Pacific Northwest, and the city is home to several lakes, streams, and parks with water features. One of the primary bodies of water in the area is Lake Washington, which offers various opportunities for recreation. During the summer months, the water temperature in Lake Washington typically ranges from 60°F to 70°F (16°C to 21°C), making it relatively cool for swimming. The lake is popular for boating, kayaking, and paddleboarding, but swimming is less common due to the chilly temperatures. However, there are designated swimming areas, such as those in some of the city's parks, where people can enjoy a dip in the lake's cool waters during warmer days.
In addition to Lake Washington, Bellevue has several smaller lakes and creeks, such as the Mercer Slough, which also provide opportunities for outdoor recreation. These smaller bodies of water are often used for kayaking, canoeing, and fishing, but the temperatures remain cool, ranging from 55°F to 65°F (13°C to 18°C) in the spring and fall. Swimming in these waters is not as widespread due to the colder temperatures and occasional strong currents. Bellevue also offers a number of public pools with controlled water temperatures, typically between 78°F and 82°F (25°C to 28°C), ideal for swimming and relaxation, especially in the summer months when the outdoor water bodies are too cool for comfort.
While swimming directly in the natural bodies of water around Bellevue is not as popular due to the cooler temperatures, the city provides a variety of ways to enjoy water-based activities. Many people enjoy the outdoor parks and trails along the lakeshores, while others prefer to swim in the well-maintained public pools where the water is consistently warmer and more comfortable.