Water Temperature of the Willamette River in Portland, OR

Current Water Temperature

44.4°F

Measurement Time: Wednesday, December 31, 2025, 1:30 AM PST

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

°F
°F
°F
%
mph
mph
°F
°F
in
%
mi
millibars

Five Day Weather Forecast

Sunny
Wed
H: 54°F
L: 34°F
Patchy rain nearby
Thu
H: 49°F
L: 33°F
Moderate rain
Fri
H: 50°F
L: 41°F
Moderate rain
Sat
H: 50°F
L: 40°F
Patchy rain nearby
Sun
H: 46°F
L: 41°F

Air Quality

AQI: 1 - Good
PM2.5: 10.75 μg/m3
PM10: 11.15 μg/m3
Carbon Monoxide: 346.85 μg/m3
Nitrogen Dioxide: 29.55 μg/m3
Sulphur Dioxide: 4.45 μg/m3
Ozone: 18 μg/m3

Astronomical

Sunrise: 7:51 AM
Sun Transit: 12:13 AM
Sunset: 4:37 PM
Daylight: 8 hrs 47 mins
Moonrise: 1:39 PM
Moon Transit: 10:00 PM
Moonset: 5:09 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 90.5%

Best Times for Fishing or Hunting

Major Periods

4:24 AM - 6:54 AM
12:00 AM - 12:00 AM

Minor Periods

1:09 PM - 2:39 PM
4:39 AM - 6:09 AM

Action Rating: 2 out of 5

Wednesday, December 31, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 40.5°F
Average Humidity: 77%
Chance of Rain: 0%
Wind: 2.9 mph
UV Index: 0.2

Astronomical

Sunrise: 7:51 AM
Sun Transit: 12:13 AM
Sunset: 4:37 PM
Daylight: 8 hrs 47 mins
Moonrise: 1:39 PM
Moon Transit: 10:00 PM
Moonset: 5:09 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 90.5%

Best Times for Fishing or Hunting

Major Periods

4:24 AM - 6:54 AM
12:00 AM - 12:00 AM

Minor Periods

1:09 PM - 2:39 PM
4:39 AM - 6:09 AM

Action Rating: 2 out of 5

Thursday, January 1, 2026

Weather Forecast

Conditions: Patchy rain nearby
Average Temperature: 41°F
Average Humidity: 88%
Chance of Rain: 75%
Wind: 2.7 mph
UV Index: 0.1

Astronomical

Sunrise: 7:51 AM
Sun Transit: 12:14 AM
Sunset: 4:38 PM
Daylight: 8 hrs 48 mins
Moonrise: 2:32 PM
Moon Transit: 11:05 PM
Moonset: 6:30 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 96.0%

Best Times for Fishing or Hunting

Major Periods

5:28 AM - 7:58 AM
12:00 AM - 12:00 AM

Minor Periods

2:02 PM - 3:32 PM
6:00 AM - 7:30 AM

Action Rating: 4 out of 5

Friday, January 2, 2026

Weather Forecast

Conditions: Moderate rain
Average Temperature: 45.2°F
Average Humidity: 84%
Chance of Rain: 82%
Wind: 7.6 mph
UV Index: 0.1

Astronomical

Sunrise: 7:51 AM
Sun Transit: 12:14 AM
Sunset: 4:39 PM
Daylight: 8 hrs 49 mins
Moonrise: 3:41 PM
Moon Transit: 12:00 AM
Moonset: 7:40 AM
Moon Phase: Full
Moon Illumination: 99.2%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
6:35 AM - 9:05 AM

Minor Periods

3:11 PM - 4:41 PM
7:10 AM - 8:40 AM

Action Rating: 4 out of 5

Saturday, January 3, 2026

Weather Forecast

Conditions: Moderate rain
Average Temperature: 45°F
Average Humidity: 87%
Chance of Rain: 86%
Wind: 18.6 mph
UV Index: 0.1

Astronomical

Sunrise: 7:51 AM
Sun Transit: 12:15 AM
Sunset: 4:40 PM
Daylight: 8 hrs 50 mins
Moonrise: 5:00 PM
Moon Transit: 12:12 AM
Moonset: 8:34 AM
Moon Phase: Full
Moon Illumination: 99.9%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
7:41 AM - 10:11 AM

Minor Periods

4:30 PM - 6:00 PM
8:04 AM - 9:34 AM

Action Rating: 6 out of 5

Sunday, January 4, 2026

Weather Forecast

Conditions: Patchy rain nearby
Average Temperature: 45.3°F
Average Humidity: 88%
Chance of Rain: 76%
Wind: 12.5 mph
UV Index: 0

Astronomical

Sunrise: 7:51 AM
Sun Transit: 12:15 AM
Sunset: 4:41 PM
Daylight: 8 hrs 51 mins
Moonrise: 6:24 PM
Moon Transit: 1:14 AM
Moonset: 9:14 AM
Moon Phase: Full
Moon Illumination: 98.1%

Best Times for Fishing or Hunting

Major Periods

12:44 AM - 3:14 AM
8:42 AM - 11:12 AM

Minor Periods

5:54 PM - 7:24 PM
8:44 AM - 10:14 AM

Action Rating: 3 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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