Water Temperature of the Willamette River in Portland, OR

Current Water Temperature

73.6°F

Measurement Time: Monday, August 25, 2025, 9:30 PM PDT

Temperature Locations

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Local Points of Interest

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Willamette River

Station Name: WILLAMETTE RIVER AT PORTLAND, OR
Data Source: Water Data - usgc.gov

Elevation Above Sea Level: 13 feet / 4 meters

Nearest Address:
SE Morrison Brg
Portland, OR 97204
Multnomah County

GPS Coordinates: 45.5175, -122.6691667

Nearby Water Temperatures

Crystal Springs Creek, Portland, OR (3.3 mi)
Johnson Creek, Milwaukie, OR (4.6 mi)
Fanno Creek, Beaverton, OR (7.6 mi)
Johnson Creek, Portland, OR (8.3 mi)
Kelley Creek, Portland, OR (8.7 mi)
Fanno Creek, Tigard, OR (8.9 mi)
Beaverton Creek, Beaverton, OR (8.9 mi)
Clackamas River, Oregon City, OR (10.5 mi)
Tualatin River , West Linn, OR (11.1 mi)
Johnson Creek, Gresham, OR (12.2 mi)
Rock Creek, Hillsboro, OR (12.8 mi)
Chicken Creek, Sherwood, OR (13.4 mi)
Tualatin River, Beaverton, OR (13.6 mi)
Tualatin River, Hillsboro, OR (15.6 mi)
Clackamas River, Estacada, OR (21.4 mi)

Weather for Portland, Oregon

Current Weather

71.1°F
Partly cloudy
Conditions: Partly cloudy
Humidity: 71%
Feels Like: 71.1°F
Wind: NNE 2.2 mph
Wind Gusts: 2.9 mph
Pressure: 29.89 in
Precipitation: 0 in
Cloud Cover: 75%
Visibility: 9 mi
UV Index: 0

Five Day Weather Forecast

Overcast
Tue
H: 90°F
L: 68°F
Partly Cloudy
Wed
H: 82°F
L: 67°F
Sunny
Thu
H: 93°F
L: 67°F
Sunny
Fri
H: 94°F
L: 61°F
Sunny
Sat
H: 86°F
L: 64°F

Air Quality

AQI: 1 - Good
PM2.5: 23.68 μg/m3
PM10: 25.16 μg/m3
Carbon Monoxide: 379.25 μg/m3
Nitrogen Dioxide: 15.36 μg/m3
Sulphur Dioxide: 5.74 μg/m3
Ozone: 90 μg/m3

Astronomical

Sunrise: 6:26 AM
Sun Transit: 1:12 PM
Sunset: 7:59 PM
Daylight: 13 hrs 33 mins
Moonrise: 10:09 AM
Moon Transit: 3:46 PM
Moonset: 9:13 PM
Moon Phase: Waxing Crescent
Moon Illumination: 6.1%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
3:16 PM - 5:46 PM

Minor Periods

8:43 PM - 10:13 PM
9:39 AM - 11:09 AM

Action Rating: 2 out of 5

Red Flag Warning issued August 25 at 9:06PM PDT until August 26 at 9:00PM PDT by NWS Portland OR

Effective: Mon August 25, 2025, 9:06 PM
Expires: Tue August 26, 2025, 7:00 AM

The National Weather Service in Portland has issued a Red Flag Warning for thunderstorms and high instability, which is in effect from 9 AM to 9 PM PDT Tuesday. * AFFECTED AREA...In Oregon, Fire Weather Zone 689 Northern Willamette National Forest and Fire Weather Zone 690 Southern Willamette National Forest. * THUNDERSTORMS...Scattered thunderstorms with critically dry fuels. * OUTFLOW WINDS...Gusts up to 40 mph may travel outward up to 25 miles from thunderstorm cores. * IMPACTS...Thunderstorm outflow winds may result in unanticipated erratic fire spread. High instability may result in fire growth. Frequent lightning and critically dry fuels may result in fire starts.

A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of the above conditions can contribute to extreme fire behavior.
Tuesday, August 26, 2025

Weather Forecast

Conditions: Overcast
Average Temperature: 75°F
Average Humidity: 64%
Chance of Rain: 0%
Wind: 4.3 mph
UV Index: 1.5

Air Quality

AQI: 2 - Moderate
PM2.5: 23.95 μg/m3
PM10: 25.13 μg/m3
Carbon Monoxide: 356.53 μg/m3
Nitrogen Dioxide: 23.81 μg/m3
Sulphur Dioxide: 4.15 μg/m3
Ozone: 77.04 μg/m3

Astronomical

Sunrise: 6:26 AM
Sun Transit: 1:12 PM
Sunset: 7:59 PM
Daylight: 13 hrs 33 mins
Moonrise: 10:09 AM
Moon Transit: 3:46 PM
Moonset: 9:13 PM
Moon Phase: Waxing Crescent
Moon Illumination: 6.1%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
3:16 PM - 5:46 PM

Minor Periods

8:43 PM - 10:13 PM
9:39 AM - 11:09 AM

Action Rating: 2 out of 5

Wednesday, August 27, 2025

Weather Forecast

Conditions: Partly Cloudy
Average Temperature: 74.7°F
Average Humidity: 56%
Chance of Rain: 0%
Wind: 4.3 mph
UV Index: 1.3

Air Quality

AQI: 2 - Moderate
PM2.5: 17.6 μg/m3
PM10: 19.62 μg/m3
Carbon Monoxide: 348.24 μg/m3
Nitrogen Dioxide: 17.06 μg/m3
Sulphur Dioxide: 3.27 μg/m3
Ozone: 67.6 μg/m3

Astronomical

Sunrise: 6:27 AM
Sun Transit: 1:12 PM
Sunset: 7:57 PM
Daylight: 13 hrs 30 mins
Moonrise: 11:15 AM
Moon Transit: 4:27 PM
Moonset: 9:30 PM
Moon Phase: Waxing Crescent
Moon Illumination: 12.6%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
3:57 PM - 6:27 PM

Minor Periods

9:00 PM - 10:30 PM
10:45 AM - 12:15 AM

Action Rating: 2 out of 5

Thursday, August 28, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 78.2°F
Average Humidity: 54%
Chance of Rain: 0%
Wind: 4.3 mph
UV Index: 1.8

Air Quality

AQI: 1 - Good
PM2.5: 12.67 μg/m3
PM10: 16.16 μg/m3
Carbon Monoxide: 338.25 μg/m3
Nitrogen Dioxide: 14.67 μg/m3
Sulphur Dioxide: 3.06 μg/m3
Ozone: 55.6 μg/m3

Astronomical

Sunrise: 6:28 AM
Sun Transit: 1:11 PM
Sunset: 7:55 PM
Daylight: 13 hrs 27 mins
Moonrise: 12:22 AM
Moon Transit: 5:10 PM
Moonset: 9:51 PM
Moon Phase: Waxing Crescent
Moon Illumination: 21.1%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
4:40 PM - 7:10 PM

Minor Periods

9:21 PM - 10:51 PM
11:52 AM - 1:22 PM

Action Rating: 2 out of 5

Friday, August 29, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 76.1°F
Average Humidity: 42%
Chance of Rain: 0%
Wind: 4.7 mph
UV Index: 1.7

Air Quality

AQI: 1 - Good
PM2.5: 12.98 μg/m3
PM10: 15.7 μg/m3
Carbon Monoxide: 360.31 μg/m3
Nitrogen Dioxide: 18.63 μg/m3
Sulphur Dioxide: 3.18 μg/m3
Ozone: 60.68 μg/m3

Astronomical

Sunrise: 6:29 AM
Sun Transit: 1:11 PM
Sunset: 7:53 PM
Daylight: 13 hrs 24 mins
Moonrise: 1:29 PM
Moon Transit: 5:55 PM
Moonset: 10:16 PM
Moon Phase: Waxing Crescent
Moon Illumination: 31.0%

Best Times for Fishing or Hunting

Major Periods

12:33 AM - 3:03 AM
5:25 PM - 7:55 PM

Minor Periods

9:46 PM - 11:16 PM
12:59 AM - 2:29 PM

Action Rating: 3 out of 5

Saturday, August 30, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 73.6°F
Average Humidity: 40%
Chance of Rain: 0%
Wind: 8.3 mph
UV Index: 0

Air Quality

AQI: 1 - Good
PM2.5: 8.58 μg/m3
PM10: 9.79 μg/m3
Carbon Monoxide: 298.56 μg/m3
Nitrogen Dioxide: 21.35 μg/m3
Sulphur Dioxide: 2.5 μg/m3
Ozone: 43.54 μg/m3

Astronomical

Sunrise: 6:30 AM
Sun Transit: 1:11 PM
Sunset: 7:51 PM
Daylight: 13 hrs 21 mins
Moonrise: 2:36 PM
Moon Transit: 6:44 PM
Moonset: 10:48 PM
Moon Phase: First Quarter
Moon Illumination: 41.9%

Best Times for Fishing or Hunting

Major Periods

1:19 AM - 3:49 AM
6:14 PM - 8:44 PM

Minor Periods

10:18 PM - 11:48 PM
2:06 PM - 3:36 PM

Action Rating: 2 out of 5

The times presented here are based upon the solunar theory, which is the idea that the movements of fish and other animals are affected by the location of the sun and moon. The major periods are believed to be the times of the greatest animal activity and occur when the moon is directly overhead or underfoot (lunar transits). The minor periods also see increased activity and occur when the moon is rising or setting. The strongest activity occurs during full or new moons, and the weakest during quarter or three quarter moons. This is indicated by the Action Rating.

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