Water Temperature of the Tualatin River in West Linn, OR

Current Water Temperature

71.2°F

Measurement Time: Wednesday, August 5, 2026, 2:00 AM 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

69.8°F
Smoky haze
Smoky haze
69.1°F
69.8°F
55%
N 2.9 mph
3.4 mph
69.8°F
53.1°F
0 in
0%
6 mi
1013 mbar
0.2

Five Day Weather Forecast

Smoky haze
Wed
H: 98°F
L: 58°F
Sunny
Thu
H: 96°F
L: 58°F
Sunny
Fri
H: 93°F
L: 56°F
Sunny
Sat
H: 89°F
L: 56°F
Sunny
Sun
H: 89°F
L: 54°F

Air Quality

AQI: 1 - Good
PM2.5: 45.1 μg/m3
PM10: 45.8 μg/m3
Carbon Monoxide: 349 μg/m3
Nitrogen Dioxide: 12.2 μg/m3
Sulphur Dioxide: 3.4 μg/m3
Ozone: 94 μg/m3

Astronomical

Sunrise: 6:00 AM
Sun Transit: 1:16 PM
Sunset: 8:33 PM
Daylight: 14 hrs 33 mins
Moonrise: 11:26 PM
Moon Transit: 6:22 AM
Moonset: 2:03 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
1:33 PM - 3:03 PM

Action Rating: 3 out of 5

Air Quality Alert issued August 4 at 11:53AM PDT by NWS Portland OR

Effective: Tue August 4, 2026, 11:53 AM
Expires: Wed August 5, 2026, 12:00 PM

The Southwest Clean Air Agency has continued an Air Quality Advisory, which is in effect until 11 AM PDT Thursday. An Air Quality Advisory for Smoke and Ozone remains in effect. Wildfires burning in the region combined with forecasted conditions will cause air quality to reach unhealthy levels due to smoke and ozone at times through 11 AM PDT 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


Heat Advisory issued August 4 at 10:54PM PDT until August 6 at 11:00PM PDT by NWS Portland OR

Effective: Tue August 4, 2026, 10:54 PM
Expires: Wed August 5, 2026, 2:00 PM

* WHAT...Afternoon high temperatures of 93 to 98 degrees and morning low temperatures of 60 to 65 degrees expected. * WHERE...Portions of northwest and west central Oregon and southwest Washington. * WHEN...Until 11 PM PDT Thursday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. * ADDITIONAL DETAILS...Wildfire smoke continues west of the Cascades over northwest Oregon and southwest Washington, which may limit high temperatures by approximately 1-3 degrees. However, temperatures will still be hot enough to bring an increased risk ofheat-related illnesses even if temperatures are dampened a few degrees from smoke.

Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.
Wednesday, August 5, 2026

Weather Forecast

Smoky haze
98.4°F
57.9°F
77.1°F
45%
0 in
1%
0%
4.5 mph
1.5


Air Quality

AQI: 3 - Unhealthy for Sensitive Groups
PM2.5: 49.17 μg/m3
PM10: 50.16 μg/m3
Carbon Monoxide: 328.88 μg/m3
Nitrogen Dioxide: 8.73 μg/m3
Sulphur Dioxide: 3.06 μg/m3
Ozone: 133.67 μg/m3

Astronomical

Sunrise: 6:00 AM
Sun Transit: 1:16 PM
Sunset: 8:33 PM
Daylight: 14 hrs 33 mins
Moonrise: 11:26 PM
Moon Transit: 6:22 AM
Moonset: 2:03 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
1:33 PM - 3:03 PM

Action Rating: 3 out of 5

Thursday, August 6, 2026

Weather Forecast

Sunny
95.5°F
58.1°F
76.2°F
39%
0 in
1%
0%
4.9 mph
5.2


Air Quality

AQI: 2 - Moderate
PM2.5: 20.78 μg/m3
PM10: 22.65 μg/m3
Carbon Monoxide: 228.08 μg/m3
Nitrogen Dioxide: 8.93 μg/m3
Sulphur Dioxide: 1.57 μg/m3
Ozone: 83.71 μg/m3

Astronomical

Sunrise: 6:01 AM
Sun Transit: 1:16 PM
Sunset: 8:32 PM
Daylight: 14 hrs 30 mins
Moonrise: 12:26 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
92.7°F
55.8°F
73.8°F
37%
0 in
1%
0%
10.1 mph
8


Air Quality

AQI: 1 - Good
PM2.5: 10.98 μg/m3
PM10: 14.03 μg/m3
Carbon Monoxide: 166 μg/m3
Nitrogen Dioxide: 6.18 μg/m3
Sulphur Dioxide: 0.74 μg/m3
Ozone: 65.21 μg/m3

Astronomical

Sunrise: 6:02 AM
Sun Transit: 1:16 PM
Sunset: 8:30 PM
Daylight: 14 hrs 28 mins
Moonrise: 12:02 AM
Moon Transit: 8:16 AM
Moonset: 4:41 PM
Moon Phase: Last Quarter
Moon Illumination: 22.2%

Best Times for Fishing or Hunting

Major Periods

7:46 AM - 10:16 AM
3:44 PM - 6:14 PM

Minor Periods

4:11 PM - 5:41 PM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Saturday, August 8, 2026

Weather Forecast

Sunny
89.4°F
56.2°F
72°F
45%
0 in
1%
0%
11 mph
8


Air Quality

AQI: 1 - Good
PM2.5: 8.29 μg/m3
PM10: 10.65 μg/m3
Carbon Monoxide: 109.36 μg/m3
Nitrogen Dioxide: 4.7 μg/m3
Sulphur Dioxide: 0.88 μg/m3
Ozone: 57.63 μg/m3

Astronomical

Sunrise: 6:04 AM
Sun Transit: 1:16 PM
Sunset: 8:29 PM
Daylight: 14 hrs 25 mins
Moonrise: 12:50 AM
Moon Transit: 9:19 AM
Moonset: 5:51 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

5:21 PM - 6:51 PM
12:20 AM - 1:50 AM

Action Rating: 2 out of 5

Sunday, August 9, 2026

Weather Forecast

Sunny
89.2°F
53.7°F
70.5°F
50%
0 in
2%
0%
9.6 mph
8


Air Quality

AQI: 1 - Good
PM2.5: 10.9 μg/m3
PM10: 14.15 μg/m3
Carbon Monoxide: 107 μg/m3
Nitrogen Dioxide: 5.42 μg/m3
Sulphur Dioxide: 0.93 μg/m3
Ozone: 49.67 μg/m3

Astronomical

Sunrise: 6:05 AM
Sun Transit: 1:16 PM
Sunset: 8:27 PM
Daylight: 14 hrs 22 mins
Moonrise: 1:53 AM
Moon Transit: 10:24 AM
Moonset: 6:49 PM
Moon Phase: Waning Crescent
Moon Illumination: 6.8%

Best Times for Fishing or Hunting

Major Periods

5:53 PM - 8:23 PM
9:54 AM - 12:24 AM

Minor Periods

6:19 PM - 7:49 PM
1:23 AM - 2:53 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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