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 22.7°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
✅ As of today, the minimum water temperature ranges from 68°F (20°C) to 74°F (23°C). The water is warm and pleasant for swimming, and in this range, one can stay in the water for extended periods without the risk of hypothermia. This is the ideal temperature for relaxation, swimming, and water sports. Families with children, as well as outdoor enthusiasts, will enjoy swimming and time spent in the water. For most people, this is the optimal temperature for a comfortable beach experience. 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 |
|---|---|---|---|
| AUG 4 | 23.1°C | 20.1°C | |
| AUG 5 | 23.2°C | 20.1°C | |
| AUG 6 | 20.5°C | 20.1°C | |
| AUG 7 | 22.6°C | 20.1°C | |
| AUG 8 | 22.6°C | 20.1°C | |
| AUG 9 | 22.7°C | 20.1°C | |
| AUG 10 | 22.8°C | 20.1°C | |
| AUG 11 | 22.7°C | 20.1°C | |
| AUG 12 | 20.1°C | 22.6°C | |
| AUG 13 | 20.1°C | 22.4°C | |
| AUG 14 | 20.1°C | 22.3°C | |
| AUG 15 | 20.1°C | 22.2°C | |
| AUG 16 | 20.1°C | 22.1°C | |
| AUG 17 | 20.1°C | 21.9°C | |
| AUG 18 | 20.1°C | 21.8°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
August 12
August 13
August 14
August 15
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.