Water Temperature of the Willamette River in Portland, OR

Current Water Temperature

32.0°F

Measurement Time: Tuesday, August 4, 2026, 12:06 AM PDT

Temperature Locations

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Local Points of Interest

Tom McCall Waterfront Park

Willamette River

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

Elevation Above Sea Level: 13 feet

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

58.6°F
Smoky haze
Smoky haze
56.7°F
58.6°F
74%
N 4 mph
7.2 mph
57.5°F
50.5°F
0 in
0%
4 mi
1015 mbar
0.1

Five Day Weather Forecast

Smoky haze
Tue
H: 97°F
L: 58°F
Smoky haze
Wed
H: 98°F
L: 62°F
Sunny
Thu
H: 96°F
L: 64°F
Sunny
Fri
H: 91°F
L: 60°F
Sunny
Sat
H: 84°F
L: 57°F

Air Quality

AQI: 1 - Good
PM2.5: 61.5 μg/m3
PM10: 62.2 μg/m3
Carbon Monoxide: 235 μg/m3
Nitrogen Dioxide: 17 μg/m3
Sulphur Dioxide: 3.2 μg/m3
Ozone: 50 μg/m3

Astronomical

Sunrise: 5:58 AM
Sun Transit: 1:16 PM
Sunset: 8:35 PM
Daylight: 14 hrs 36 mins
Moonrise: 10:58 PM
Moon Transit: 5:33 AM
Moonset: 12:46 AM
Moon Phase: Last Quarter
Moon Illumination: 54.6%

Best Times for Fishing or Hunting

Major Periods

5:03 AM - 7:33 AM
12:57 AM - 3:27 PM

Minor Periods

10:28 PM - 11:58 PM
12:16 AM - 1:46 PM

Action Rating: 2 out of 5

Air Quality Alert issued August 3 at 12:59PM PDT by NWS Portland OR

Effective: Mon August 3, 2026, 12:59 PM
Expires: Tue August 4, 2026, 12:00 PM

The Southwest Clean Air Agency, and the Oregon Department of Environmental Quality have issued an Air Quality Advisory, which is in effect until further notice. An Air Quality Advisory for smoke has been issued. Wildfires burning in the region combined with forecasted conditions will cause air quality to reach unhealthy levels at times until further notice. Pollutants in smoke can cause burning eyes, runny nose, aggravate heart and lung diseases, and aggravate other serious health problems. Limit outdoor activities and keep children indoors if it is smoky. Please follow medical advice if you have a heart or lung condition. More information about air quality can be found at: www.swcleanair.gov www.oregon.gov/DEQ


Air Quality Alert issued August 3 at 12:17PM PDT by NWS Portland OR

Effective: Mon August 3, 2026, 12:17 PM
Expires: Tue August 4, 2026, 12:00 PM

The Oregon Department of Environmental Quality has issued an Air Quality Advisory for the Portland metro and eastern Clackamas County, which is in effect until further notice. An Air Quality Advisory for smoke has been issued. Wildfires burning in the region combined with forecasted conditions will cause air quality to reach unhealthy levels at times until further notice. Pollutants in smoke can cause burning eyes, runny nose, aggravate heart and lung diseases, and aggravate other serious health problems. Limit outdoor activities and keep children indoors if it is smoky. Please follow medical advice if you have a heart or lung condition. More information about air quality can be found at: www.oregon.gov/DEQ


Air Quality Alert issued August 3 at 3:41PM PDT by NWS Portland OR

Effective: Mon August 3, 2026, 3:41 PM
Expires: Tue August 4, 2026, 12:00 PM

The Southwest Clean Air Agency and the Oregon Department of Environmental Quality have issued an Air Quality Advisory, which is IN EFFECT UNTIL NOON PDT WEDNESDAY. An Air Quality Advisory for Smoke has been issued. Wildfires burning in the region combined with forecasted conditions will cause air quality to reach unhealthy levels at times until further notice. Pollutants in smoke can cause burning eyes, runny nose, aggravate heart and lung diseases, and aggravate other serious health problems. Limit outdoor activities and keep children indoors if it is smoky. Please follow medical advice if you have a heart or lung condition. More information about air quality can be found at: www.swcleanair.gov www.oregon.gov/DEQ


Air Quality Alert issued August 3 at 12:59PM PDT by NWS Portland OR

Effective: Mon August 3, 2026, 12:59 PM
Expires: Tue August 4, 2026, 12:00 PM

The Southwest Clean Air Agency has issued an Air Quality Advisory for Clark County. An Air Quality Advisory for smoke and ozone has been issued. Wildfires burning in the region combined with forecasted conditions will cause air quality to reach unhealthy levels at times. The Air Quality Advisory for smoke is in effect until further notice. The Air Quality Advisory for ozone is in effect from noon Tuesday through Thursday. Pollutants in smoke can cause burning eyes, runny nose, aggravate heart and lung diseases, and aggravate other serious health problems. Limit outdoor activities and keep children indoors if it is smoky. Please follow medical advice if you have a heart or lung condition. More information about air quality can be found at: www.swcleanair.gov


Air Quality Alert issued August 3 at 3:41PM PDT by NWS Portland OR

Effective: Mon August 3, 2026, 3:41 PM
Expires: Tue August 4, 2026, 12:00 PM

The Southwest Clean Air Agency has issued an Air Quality Advisory for Clark County. An Air Quality Advisory for smoke and ozone has been issued. Wildfires burning in the region combined with forecasted conditions will cause air quality to reach unhealthy levels at times. The Air Quality Advisory for smoke is in effect until further notice. The Air Quality Advisory for ozone is in effect from noon Tuesday through Thursday. Pollutants in smoke can cause burning eyes, runny nose, aggravate heart and lung diseases, and aggravate other serious health problems. Limit outdoor activities and keep children indoors if it is smoky. Please follow medical advice if you have a heart or lung condition. More information about air quality can be found at: www.swcleanair.gov
Tuesday, August 4, 2026

Weather Forecast

Smoky haze
97.3°F
57.7°F
75.6°F
46%
0 in
1%
0%
10.5 mph
2.6


Air Quality

AQI: 3 - Unhealthy for Sensitive Groups
PM2.5: 61.17 μg/m3
PM10: 62.54 μg/m3
Carbon Monoxide: 326.08 μg/m3
Nitrogen Dioxide: 10.43 μg/m3
Sulphur Dioxide: 3.77 μg/m3
Ozone: 138.25 μg/m3

Astronomical

Sunrise: 5:58 AM
Sun Transit: 1:16 PM
Sunset: 8:35 PM
Daylight: 14 hrs 36 mins
Moonrise: 10:58 PM
Moon Transit: 5:33 AM
Moonset: 12:46 AM
Moon Phase: Last Quarter
Moon Illumination: 54.6%

Best Times for Fishing or Hunting

Major Periods

5:03 AM - 7:33 AM
12:57 AM - 3:27 PM

Minor Periods

10:28 PM - 11:58 PM
12:16 AM - 1:46 PM

Action Rating: 2 out of 5

Wednesday, August 5, 2026

Weather Forecast

Smoky haze
97.9°F
61.7°F
79°F
36%
0 in
1%
0%
7.6 mph
1.9


Air Quality

AQI: 4 - Unhealthy
PM2.5: 70.78 μg/m3
PM10: 71.88 μg/m3
Carbon Monoxide: 387.04 μg/m3
Nitrogen Dioxide: 10.2 μg/m3
Sulphur Dioxide: 4.05 μg/m3
Ozone: 156.33 μg/m3

Astronomical

Sunrise: 6:00 AM
Sun Transit: 1:16 PM
Sunset: 8:33 PM
Daylight: 14 hrs 34 mins
Moonrise: 11:25 PM
Moon Transit: 6:22 AM
Moonset: 2:04 PM
Moon Phase: Last Quarter
Moon Illumination: 43.2%

Best Times for Fishing or Hunting

Major Periods

5:52 AM - 8:22 AM
1:48 PM - 4:18 PM

Minor Periods

12:00 AM - 12:00 AM
1:34 PM - 3:04 PM

Action Rating: 3 out of 5

Thursday, August 6, 2026

Weather Forecast

Sunny
95.8°F
63.6°F
78.6°F
38%
0 in
1%
0%
9.2 mph
5.3


Air Quality

AQI: 2 - Moderate
PM2.5: 25.08 μg/m3
PM10: 26.69 μg/m3
Carbon Monoxide: 292.29 μg/m3
Nitrogen Dioxide: 7.86 μg/m3
Sulphur Dioxide: 1.45 μg/m3
Ozone: 99.96 μg/m3

Astronomical

Sunrise: 6:01 AM
Sun Transit: 1:16 PM
Sunset: 8:32 PM
Daylight: 14 hrs 31 mins
Moonrise: 12:25 AM
Moon Transit: 7:16 AM
Moonset: 3:23 PM
Moon Phase: Last Quarter
Moon Illumination: 32.3%

Best Times for Fishing or Hunting

Major Periods

6:46 AM - 9:16 AM
2:43 PM - 5:13 PM

Minor Periods

2:53 PM - 4:23 PM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Friday, August 7, 2026

Weather Forecast

Sunny
91°F
60.1°F
74°F
40%
0 in
1%
0%
10.7 mph
8


Air Quality

AQI: 1 - Good
PM2.5: 9.75 μg/m3
PM10: 12.63 μg/m3
Carbon Monoxide: 140.76 μg/m3
Nitrogen Dioxide: 6.03 μg/m3
Sulphur Dioxide: 0.88 μg/m3
Ozone: 64.92 μg/m3

Astronomical

Sunrise: 6:02 AM
Sun Transit: 1:16 PM
Sunset: 8:30 PM
Daylight: 14 hrs 29 mins
Moonrise: 12:01 AM
Moon Transit: 8:15 AM
Moonset: 4:42 PM
Moon Phase: Last Quarter
Moon Illumination: 22.2%

Best Times for Fishing or Hunting

Major Periods

7:45 AM - 10:15 AM
3:44 PM - 6:14 PM

Minor Periods

4:12 PM - 5:42 PM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Saturday, August 8, 2026

Weather Forecast

Sunny
84.4°F
56.7°F
69.7°F
48%
0 in
1%
0%
11.4 mph
7


Air Quality

AQI: 1 - Good
PM2.5: 7.88 μg/m3
PM10: 10.27 μg/m3
Carbon Monoxide: 110.17 μg/m3
Nitrogen Dioxide: 7.22 μg/m3
Sulphur Dioxide: 0.73 μg/m3
Ozone: 44.33 μg/m3

Astronomical

Sunrise: 6:03 AM
Sun Transit: 1:16 PM
Sunset: 8:29 PM
Daylight: 14 hrs 26 mins
Moonrise: 12:49 AM
Moon Transit: 9:19 AM
Moonset: 5:52 PM
Moon Phase: Waning Crescent
Moon Illumination: 13.6%

Best Times for Fishing or Hunting

Major Periods

8:49 AM - 11:19 AM
4:48 PM - 7:18 PM

Minor Periods

5:22 PM - 6:52 PM
12:19 AM - 1:49 AM

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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