Renton — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Renton, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Renton today is 14.9°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 |
|---|---|---|---|
| SEP 14 | 16.2°C | 16.5°C | |
| SEP 15 | 15.4°C | 16.5°C | |
| SEP 16 | 15.8°C | 16.5°C | |
| SEP 17 | 15.1°C | 16.5°C | |
| SEP 18 | 15.2°C | 16.5°C | |
| SEP 19 | 15.3°C | 16.5°C | |
| SEP 20 | 15.7°C | 16.5°C | |
| SEP 21 | 15.7°C | 16.5°C | |
| SEP 22 | 16.5°C | 15.0°C | |
| SEP 23 | 16.5°C | 15.1°C | |
| SEP 24 | 16.5°C | 15.1°C | |
| SEP 25 | 16.5°C | 15.2°C | |
| SEP 26 | 16.5°C | 15.3°C | |
| SEP 27 | 16.5°C | 15.4°C | |
| SEP 28 | 16.5°C | 15.5°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 | 13°C | 18°C | 22°C |
| July | 15°C | 20°C | 24°C |
| August | 17°C | 20°C | 24°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 | 5°C | 8°C |
Renton: Weather Forecast
September 21
September 22
September 23
September 24
September 25
Location & Local Information
Renton, Washington, is located near the Cedar River, a vital waterway that flows through the city and offers numerous outdoor recreational activities. The water temperature in the Cedar River varies significantly depending on the season. During the summer months, the river typically stays cool, with temperatures ranging from 55°F to 65°F (13°C to 18°C). While this makes the water refreshing for activities like fishing, kayaking, and tubing, it is generally too cold for comfortable swimming, especially for those looking for a traditional swim in warm waters.
Despite the cooler temperatures, the Cedar River is popular for canoeing, kayaking, and fishing, and the surrounding parks provide beautiful areas to relax and enjoy the scenic views. Swimming directly in the Cedar River near Renton is not as common due to its cooler waters and occasional strong currents, making it a less ideal environment for casual swimmers. However, the river is still enjoyed by outdoor enthusiasts for more active water sports.
For those seeking a warmer swimming experience, Renton offers a variety of public pools where water is maintained at more comfortable temperatures, typically between 78°F and 82°F (25°C to 28°C). These pools are more suitable for recreational swimming, especially during the hot summer months when the river's temperatures remain too cold for a casual swim. Despite this, the Cedar River remains an important part of Renton's outdoor recreational scene, providing plenty of opportunities for water-based activities, even if swimming is not the primary draw.