Cedar River — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in the Cedar River, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in the Cedar River today is 14.5°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
⚠️ As of today, the minimum water temperature ranges from 54°F (12°C) to 60°F (15°C). The water is significantly warmer, and swimming becomes possible for most people. However, caution may still be required for prolonged stays in the water, as extended exposure can cause discomfort. This is a suitable temperature range for short swims and for those accustomed to cooler water. For more comfortable swimming, it is recommended to use proper gear. 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 23 | 18.5°C | 17.3°C | |
| JUN 24 | 18.6°C | 17.3°C | |
| JUN 25 | 18.6°C | 17.3°C | |
| JUN 26 | 18.7°C | 17.3°C | |
| JUN 27 | 18.5°C | 17.3°C | |
| JUN 28 | 15.3°C | 17.3°C | |
| JUN 29 | 14.8°C | 17.3°C | |
| JUN 30 | 14.5°C | 17.3°C | |
| JUL 1 | 20.0°C | 14.8°C | |
| JUL 2 | 20.0°C | 15.1°C | |
| JUL 3 | 20.0°C | 15.3°C | |
| JUL 4 | 20.0°C | 15.6°C | |
| JUL 5 | 20.0°C | 15.9°C | |
| JUL 6 | 20.0°C | 16.2°C | |
| JUL 7 | 20.0°C | 16.4°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 | 12°C | 17°C | 22°C |
| July | 17°C | 20°C | 24°C |
| August | 17°C | 21°C | 23°C |
| September | 11°C | 16°C | 20°C |
| October | 8°C | 13°C | 16°C |
| November | 3°C | 8°C | 16°C |
| December | 3°C | 5°C | 8°C |
Cedar River: Water Temperature by Location
Cedar River: Weather Forecast
July 1
July 2
July 3
July 4
July 5
Location & Local Information
Source Cascade Range
• elevation 2,220 ft (680 m)
Mouth Lake Washington
Length 45 mi (72 km)
The Cedar River in Washington State is a vital waterway known for its picturesque surroundings and ecological importance. The river’s water temperature is influenced by the season and its mountainous origin, with summer temperatures typically ranging from 55°F to 65°F (13°C to 18°C). In cooler months, the water temperature can drop significantly, often falling below 50°F (10°C), especially in spring when snowmelt contributes to its flow.
Swimming in the Cedar River is possible in certain areas, but it requires caution. The water is often chilly, even in summer, which can be refreshing but challenging for extended swimming sessions. Popular spots for wading or taking a quick dip include calmer stretches near parks or designated access points, such as areas around Renton or along the Cedar River Trail. However, the river’s flow can be swift in certain sections, and swimmers should be mindful of currents and uneven riverbeds.
For a safer swimming experience, visitors may prefer nearby lakes, such as Lake Washington or Lake Wilderness, which offer warmer and calmer waters. The Cedar River remains a popular destination for kayaking, fishing, and enjoying the natural beauty of the Pacific Northwest, even if swimming is not its primary attraction.