Willamette River — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in the Willamette River, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in the Willamette River today is 14.4°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 |
|---|---|---|---|
| OCT 5 | 16.1°C | 13.3°C | |
| OCT 6 | 16.4°C | 13.3°C | |
| OCT 7 | 16.4°C | 13.3°C | |
| OCT 8 | 16.4°C | 13.3°C | |
| OCT 9 | 15.9°C | 13.3°C | |
| OCT 10 | 15.8°C | 13.3°C | |
| OCT 11 | 16.8°C | 13.3°C | |
| OCT 12 | 14.1°C | 13.3°C | |
| OCT 13 | 13.3°C | 14.3°C | |
| OCT 14 | 13.3°C | 14.3°C | |
| OCT 15 | 13.3°C | 14.2°C | |
| OCT 16 | 13.3°C | 14.2°C | |
| OCT 17 | 13.3°C | 14.1°C | |
| OCT 18 | 13.3°C | 14.1°C | |
| OCT 19 | 13.3°C | 14.0°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 | 20°C | 24°C |
| September | 11°C | 16°C | 21°C |
| October | 8°C | 13°C | 16°C |
| November | 3°C | 8°C | 16°C |
| December | 3°C | 7°C | 12°C |
Willamette River: Water Temperature by Location
Willamette River: Weather Forecast
October 13
October 14
October 15
October 16
October 17
October 18
Location & Local Information
Source Confluence of Middle Fork Willamette River and Coast Fork Willamette River
• location near Eugene, Lane County, Oregon
Mouth Columbia River
• location Portland, Multnomah County, Oregon
Length 187 mi (301 km)
The Willamette River, which flows through Oregon, is known for its scenic beauty and recreational opportunities. During the summer months, the water temperature typically ranges from 60°F to 70°F (15°C to 21°C), making it cool but generally tolerable for swimming, especially for those who enjoy a brisk dip. The river’s water temperature can rise slightly in warmer stretches or during dry periods, but it often remains on the cooler side due to its source in the Cascade Range, where the water is fed by mountain streams and runoff.
While the Willamette River is not as widely recognized for its swimming opportunities as other bodies of water, there are some areas along its banks that offer safe spots for swimming. Popular swimming areas are typically found in calmer sections of the river, away from strong currents or boat traffic. However, swimmers should exercise caution, as the river can have unpredictable currents, especially after rainfall or in sections where the water flow is more rapid. Many people also enjoy kayaking, canoeing, or floating down the river on tubes, making the Willamette a favorite spot for outdoor water activities.
The Willamette River is surrounded by lush forests and urban parks, making it a scenic destination for outdoor enthusiasts. In addition to swimming, visitors often come to enjoy a range of other recreational activities, such as picnicking, birdwatching, and fishing. The river’s cooler waters, combined with its natural beauty and accessible locations, make it a great place for a day on the water, whether you're looking to swim, relax, or engage in other outdoor pursuits.