Water Temperature of the Willamette River in Portland, OR

Current Water Temperature

51.3°F

Measurement Time: Tuesday, March 31, 2026, 1:30 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

42.1°F
Partly cloudy
Partly cloudy
41.7°F
42.6°F
70%
ENE 2.2 mph
3.1 mph
41.1°F
32.8°F
0 in
75%
9 mi
1011 mbar
0.1

Five Day Weather Forecast

Sunny
Tue
H: 57°F
L: 39°F
Heavy rain
Wed
H: 51°F
L: 41°F
Cloudy
Thu
H: 51°F
L: 41°F
Partly Cloudy
Fri
H: 58°F
L: 42°F
Partly Cloudy
Sat
H: 66°F
L: 40°F

Air Quality

AQI: 1 - Good
PM2.5: 8.65 μg/m3
PM10: 11.45 μg/m3
Carbon Monoxide: 217.85 μg/m3
Nitrogen Dioxide: 10.95 μg/m3
Sulphur Dioxide: 3.25 μg/m3
Ozone: 69 μg/m3

Astronomical

Sunrise: 6:53 AM
Sun Transit: 1:14 PM
Sunset: 7:38 PM
Daylight: 12 hrs 45 mins
Moonrise: 6:34 PM
Moon Transit: 12:00 AM
Moonset: 6:13 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 97.6%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
7:17 AM - 9:47 AM

Minor Periods

6:04 PM - 7:34 PM
5:43 AM - 7:13 AM

Action Rating: 5 out of 5

Winter Storm Watch issued March 30 at 9:21AM PDT until April 2 at 5:00PM PDT by NWS Portland OR

Effective: Mon March 30, 2026, 9:21 AM
Expires: Tue March 31, 2026, 2:15 AM

* WHAT...Heavy snow possible. Total snow accumulations between 10 to 18 inches possible. Winds could gust as high as 35 mph. * WHERE...Northern and Central Oregon Cascades. * WHEN...From late Tuesday night through Thursday afternoon. * IMPACTS...Roads, and especially bridges and overpasses, will likely become slick and hazardous. * ADDITIONAL DETAILS...Latest guidance suggests the heaviest snow accumulations are forecast over the Cascades from Marion to Lane Counties.

Winterize your vehicle and have a winter emergency driving kit readily available. Make sure your emergency kit has the following items: flashlights, batteries, blankets, a shovel, water, non-perishable food items, tire chains, etc. Now is a good time to put snow tires on your vehicle. Check on friends and family to see if they need help preparing. Monitor the latest forecasts and warnings for updates on this situation.


Winter Storm Watch issued March 30 at 10:38PM PDT until April 2 at 5:00PM PDT by NWS Portland OR

Effective: Mon March 30, 2026, 10:38 PM
Expires: Tue March 31, 2026, 11:00 AM

* WHAT...Heavy snow possible. Total snow accumulations between 10 to 18 inches possible. Winds could gust as high as 35 mph. * WHERE...Northern and Central Oregon Cascades. * WHEN...From late Tuesday night through Thursday afternoon. * IMPACTS...Roads, and especially bridges and overpasses, will likely become slick and hazardous. * ADDITIONAL DETAILS...Latest guidance suggests the heaviest snow accumulations are forecast over the Cascades from Marion to Lane Counties. There is a 50-75% chance snowfall rates will occasionally exceed 1 inch/hour along the Cascade passes between 4 PM Wednesday and 8 AM Thursday, resulting in hazardous travel conditions due to a combination of low visibilities and accumulating snow.

Winterize your vehicle and have a winter emergency driving kit readily available. Make sure your emergency kit has the following items: flashlights, batteries, blankets, a shovel, water, non-perishable food items, tire chains, etc. Now is a good time to put snow tires on your vehicle. Check on friends and family to see if they need help preparing. Monitor the latest forecasts and warnings for updates on this situation.


Tuesday, March 31, 2026

Weather Forecast

Sunny
56.7°F
38.5°F
46.4°F
71%
0 in
0%
0%
3.8 mph
0.5


Air Quality

AQI: 1 - Good
PM2.5: 6.19 μg/m3
PM10: 7.25 μg/m3
Carbon Monoxide: 218.45 μg/m3
Nitrogen Dioxide: 15.73 μg/m3
Sulphur Dioxide: 2.6 μg/m3
Ozone: 58.92 μg/m3

Astronomical

Sunrise: 6:53 AM
Sun Transit: 1:14 PM
Sunset: 7:38 PM
Daylight: 12 hrs 45 mins
Moonrise: 6:34 PM
Moon Transit: 12:00 AM
Moonset: 6:13 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 97.6%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
7:17 AM - 9:47 AM

Minor Periods

6:04 PM - 7:34 PM
5:43 AM - 7:13 AM

Action Rating: 5 out of 5

Wednesday, April 1, 2026

Weather Forecast

Heavy rain
51.4°F
40.5°F
45.4°F
86%
0.84 in
89%
0%
13.4 mph
0.3


Air Quality

AQI: 1 - Good
PM2.5: 6.44 μg/m3
PM10: 7.59 μg/m3
Carbon Monoxide: 225.69 μg/m3
Nitrogen Dioxide: 11.38 μg/m3
Sulphur Dioxide: 2.33 μg/m3
Ozone: 66.32 μg/m3

Astronomical

Sunrise: 6:51 AM
Sun Transit: 1:14 PM
Sunset: 7:39 PM
Daylight: 12 hrs 48 mins
Moonrise: 7:43 PM
Moon Transit: 12:37 AM
Moonset: 6:29 AM
Moon Phase: Full
Moon Illumination: 99.8%

Best Times for Fishing or Hunting

Major Periods

12:07 AM - 2:37 AM
8:00 AM - 10:30 AM

Minor Periods

7:13 PM - 8:43 PM
5:59 AM - 7:29 AM

Action Rating: 4 out of 5

Thursday, April 2, 2026

Weather Forecast

Cloudy
50.7°F
40.8°F
45.5°F
81%
0 in
0%
0%
6.9 mph
0.6


Air Quality

AQI: 1 - Good
PM2.5: 3.39 μg/m3
PM10: 4.24 μg/m3
Carbon Monoxide: 186.85 μg/m3
Nitrogen Dioxide: 6.16 μg/m3
Sulphur Dioxide: 1.83 μg/m3
Ozone: 72.6 μg/m3

Astronomical

Sunrise: 6:49 AM
Sun Transit: 1:14 PM
Sunset: 7:40 PM
Daylight: 12 hrs 51 mins
Moonrise: 8:52 PM
Moon Transit: 1:20 AM
Moonset: 6:47 AM
Moon Phase: Full
Moon Illumination: 99.5%

Best Times for Fishing or Hunting

Major Periods

12:50 AM - 3:20 AM
8:42 AM - 11:12 AM

Minor Periods

8:22 PM - 9:52 PM
6:17 AM - 7:47 AM

Action Rating: 3 out of 5

Friday, April 3, 2026

Weather Forecast

Partly Cloudy
58.1°F
41.7°F
48.3°F
73%
0 in
0%
0%
3.6 mph
1.2


Air Quality

AQI: 1 - Good
PM2.5: 9.98 μg/m3
PM10: 12.04 μg/m3
Carbon Monoxide: 326.78 μg/m3
Nitrogen Dioxide: 20.43 μg/m3
Sulphur Dioxide: 2.77 μg/m3
Ozone: 49.04 μg/m3

Astronomical

Sunrise: 6:47 AM
Sun Transit: 1:13 PM
Sunset: 7:42 PM
Daylight: 12 hrs 55 mins
Moonrise: 10:00 PM
Moon Transit: 2:03 AM
Moonset: 7:05 AM
Moon Phase: Full
Moon Illumination: 96.6%

Best Times for Fishing or Hunting

Major Periods

1:33 AM - 4:03 AM
9:26 AM - 11:56 AM

Minor Periods

9:30 PM - 11:00 PM
6:35 AM - 8:05 AM

Action Rating: 4 out of 5

Saturday, April 4, 2026

Weather Forecast

Partly Cloudy
65.7°F
40.3°F
52°F
68%
0 in
0%
0%
5.8 mph
0


Air Quality

AQI: 1 - Good
PM2.5: 8.69 μg/m3
PM10: 10.55 μg/m3
Carbon Monoxide: 246.3 μg/m3
Nitrogen Dioxide: 20.96 μg/m3
Sulphur Dioxide: 2.32 μg/m3
Ozone: 48.46 μg/m3

Astronomical

Sunrise: 6:45 AM
Sun Transit: 1:13 PM
Sunset: 7:43 PM
Daylight: 12 hrs 58 mins
Moonrise: 11:09 PM
Moon Transit: 2:48 AM
Moonset: 7:27 AM
Moon Phase: Full
Moon Illumination: 91.3%

Best Times for Fishing or Hunting

Major Periods

2:18 AM - 4:48 AM
10:11 AM - 12:41 AM

Minor Periods

12:00 AM - 12:00 AM
6:57 AM - 8:27 AM

Action Rating: 4 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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