Water Temperature of the Tualatin River in West Linn, OR

Current Water Temperature

55.0°F

Measurement Time: Tuesday, April 7, 2026, 6:00 PM PDT

Temperature Locations

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Local Points of Interest

Oswego Dam

Tualatin River

Station Name: TUALATIN RIVER AT OSWEGO DAM, NEAR WEST LINN, OR
Data Source: Water Data - usgc.gov

Elevation Above Sea Level: 151 feet

Nearest Address:
967 SW Borland Rd
West Linn, OR 97068
Clackamas County

GPS Coordinates: 45.35650877, -122.6850937

Nearby Water Temperatures

Fanno Creek, Tigard, OR (4.7 mi)
Clackamas River, Oregon City, OR (5.5 mi)
Johnson Creek, Milwaukie, OR (7 mi)
Crystal Springs Creek, Portland, OR (8.4 mi)
Fanno Creek, Beaverton, OR (8.4 mi)
Chicken Creek, Sherwood, OR (8.5 mi)
Tualatin River, Beaverton, OR (10.7 mi)
Willamette River, Portland, OR (11.1 mi)
Johnson Creek, Portland, OR (12 mi)
Kelley Creek, Portland, OR (12.3 mi)
Beaverton Creek, Beaverton, OR (12.8 mi)
Willamette River, West Linn, OR (14.3 mi)
Johnson Creek, Gresham, OR (15.6 mi)
Rock Creek, Hillsboro, OR (16 mi)
Clackamas River, Estacada, OR (16.6 mi)

Weather for West Linn, Oregon

Current Weather

45°F
Clear
Clear
44.3°F
45.9°F
74%
N 2.7 mph
5.3 mph
45.9°F
39°F
0 in
0%
9 mi
1019 mbar
0

Five Day Weather Forecast

Sunny
Wed
H: 69°F
L: 43°F
Sunny
Thu
H: 74°F
L: 48°F
Patchy rain nearby
Fri
H: 69°F
L: 53°F
Patchy rain nearby
Sat
H: 61°F
L: 47°F
Patchy rain nearby
Sun
H: 48°F
L: 45°F

Air Quality

AQI: 1 - Good
PM2.5: 8.15 μg/m3
PM10: 9.15 μg/m3
Carbon Monoxide: 254.85 μg/m3
Nitrogen Dioxide: 13.25 μg/m3
Sulphur Dioxide: 2.75 μg/m3
Ozone: 28 μg/m3

Astronomical

Sunrise: 6:38 AM
Sun Transit: 1:12 PM
Sunset: 7:48 PM
Daylight: 13 hrs 10 mins
Moonrise: 2:11 AM
Moon Transit: 6:05 AM
Moonset: 10:02 AM
Moon Phase: Last Quarter
Moon Illumination: 53.2%

Best Times for Fishing or Hunting

Major Periods

5:35 AM - 8:05 AM
1:30 PM - 4:00 PM

Minor Periods

9:32 AM - 11:02 AM
1:41 AM - 3:11 AM

Action Rating: 2 out of 5

Frost Advisory issued April 7 at 9:21AM PDT until April 8 at 9:00AM PDT by NWS Portland OR

Effective: Tue April 7, 2026, 9:21 AM
Expires: Wed April 8, 2026, 9:00 AM

* WHAT...Temperatures as low as 34 to 36 degrees will result in frost formation. * WHERE...Central and Southern Willamette Valley, Tualatin Valley, and Inner Vancouver Metro. * WHEN...From 11 PM this evening to 9 AM PDT Wednesday. * IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered.

Take steps now to protect tender outdoor plants from the cold. Consider temporarily moving outdoor potted plants indoors if they are sensitive to cold temperatures. Consider temporarily covering sensitive plants with a lightweight cotton fabric (i.e., bedsheets, thin blankets), as this will help retain heat and provide frost protection for your plants.


Frost Advisory issued April 7 at 9:21AM PDT until April 8 at 9:00AM PDT by NWS Portland OR

Effective: Tue April 7, 2026, 9:21 AM
Expires: Wed April 8, 2026, 9:00 AM

* WHAT...Temperatures as low as 33 to 36 degrees will result in frost formation. * WHERE...Willapa Hills and Adjacent River Valleys of Pacific and Wahkiakum Counties, Lower Columbia River and Cowlitz River Valleys, North Oregon Coast Range Lowlands, North Oregon Coast Range, Upper Hood River Valley, North Clark County Lowlands, and South Washington Cascade Foothills. * WHEN...From 11 PM this evening to 9 AM PDT Wednesday. * IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered.

Take steps now to protect tender outdoor plants from the cold. Consider temporarily moving outdoor potted plants indoors if they are sensitive to cold temperatures. Consider temporarily covering sensitive plants with a lightweight cotton fabric (i.e., bedsheets, thin blankets), as this will help retain heat and provide frost protection for your plants.
Wednesday, April 8, 2026

Weather Forecast

Sunny
69.1°F
42.6°F
54.9°F
65%
0 in
0%
0%
3.4 mph
1.3


Air Quality

AQI: 1 - Good
PM2.5: 9.04 μg/m3
PM10: 10.98 μg/m3
Carbon Monoxide: 231.41 μg/m3
Nitrogen Dioxide: 17.27 μg/m3
Sulphur Dioxide: 2.73 μg/m3
Ozone: 47.84 μg/m3

Astronomical

Sunrise: 6:38 AM
Sun Transit: 1:12 PM
Sunset: 7:48 PM
Daylight: 13 hrs 10 mins
Moonrise: 2:11 AM
Moon Transit: 6:05 AM
Moonset: 10:02 AM
Moon Phase: Last Quarter
Moon Illumination: 53.2%

Best Times for Fishing or Hunting

Major Periods

5:35 AM - 8:05 AM
1:30 PM - 4:00 PM

Minor Periods

9:32 AM - 11:02 AM
1:41 AM - 3:11 AM

Action Rating: 2 out of 5

Thursday, April 9, 2026

Weather Forecast

Sunny
73.9°F
47.7°F
60.4°F
55%
0 in
0%
0%
4.5 mph
1.4


Air Quality

AQI: 1 - Good
PM2.5: 10.96 μg/m3
PM10: 12.42 μg/m3
Carbon Monoxide: 294.85 μg/m3
Nitrogen Dioxide: 22.81 μg/m3
Sulphur Dioxide: 3.27 μg/m3
Ozone: 54.84 μg/m3

Astronomical

Sunrise: 6:36 AM
Sun Transit: 1:12 PM
Sunset: 7:49 PM
Daylight: 13 hrs 13 mins
Moonrise: 2:56 AM
Moon Transit: 6:57 AM
Moonset: 11:02 AM
Moon Phase: Last Quarter
Moon Illumination: 41.9%

Best Times for Fishing or Hunting

Major Periods

6:27 AM - 8:57 AM
2:21 PM - 4:51 PM

Minor Periods

10:32 AM - 12:02 AM
2:26 AM - 3:56 AM

Action Rating: 3 out of 5

Friday, April 10, 2026

Weather Forecast

Patchy rain nearby
68.7°F
52.5°F
60.6°F
64%
0.08 in
77%
0%
4.5 mph
1.3


Air Quality

AQI: 1 - Good
PM2.5: 9.88 μg/m3
PM10: 10.75 μg/m3
Carbon Monoxide: 241.61 μg/m3
Nitrogen Dioxide: 16.96 μg/m3
Sulphur Dioxide: 2.58 μg/m3
Ozone: 51.68 μg/m3

Astronomical

Sunrise: 6:34 AM
Sun Transit: 1:11 PM
Sunset: 7:51 PM
Daylight: 13 hrs 16 mins
Moonrise: 3:33 AM
Moon Transit: 7:47 AM
Moonset: 12:08 AM
Moon Phase: Last Quarter
Moon Illumination: 31.0%

Best Times for Fishing or Hunting

Major Periods

7:17 AM - 9:47 AM
3:11 PM - 5:41 PM

Minor Periods

11:38 AM - 1:08 PM
3:03 AM - 4:33 AM

Action Rating: 2 out of 5

Saturday, April 11, 2026

Weather Forecast

Patchy rain nearby
61.2°F
46.7°F
53.5°F
73%
0.01 in
83%
0%
6.3 mph
1


Air Quality

AQI: 1 - Good
PM2.5: 5.86 μg/m3
PM10: 7.61 μg/m3
Carbon Monoxide: 177.17 μg/m3
Nitrogen Dioxide: 4.81 μg/m3
Sulphur Dioxide: 1.92 μg/m3
Ozone: 74.92 μg/m3

Astronomical

Sunrise: 6:33 AM
Sun Transit: 1:11 PM
Sunset: 7:52 PM
Daylight: 13 hrs 19 mins
Moonrise: 4:02 AM
Moon Transit: 8:36 AM
Moonset: 1:18 PM
Moon Phase: Last Quarter
Moon Illumination: 21.1%

Best Times for Fishing or Hunting

Major Periods

8:06 AM - 10:36 AM
3:59 PM - 6:29 PM

Minor Periods

12:48 AM - 2:18 PM
3:32 AM - 5:02 AM

Action Rating: 2 out of 5

Sunday, April 12, 2026

Weather Forecast

Patchy rain nearby
48.2°F
44.7°F
47°F
88%
0.03 in
80%
0%
10.5 mph
0


Air Quality

AQI: 1 - Good
PM2.5: 3.47 μg/m3
PM10: 4.53 μg/m3
Carbon Monoxide: 182.14 μg/m3
Nitrogen Dioxide: 4.45 μg/m3
Sulphur Dioxide: 1.56 μg/m3
Ozone: 67.46 μg/m3

Astronomical

Sunrise: 6:31 AM
Sun Transit: 1:11 PM
Sunset: 7:53 PM
Daylight: 13 hrs 22 mins
Moonrise: 4:27 AM
Moon Transit: 9:23 AM
Moonset: 2:30 PM
Moon Phase: Waning Crescent
Moon Illumination: 12.6%

Best Times for Fishing or Hunting

Major Periods

8:53 AM - 11:23 AM
4:46 PM - 7:16 PM

Minor Periods

2:00 PM - 3:30 PM
3:57 AM - 5:27 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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