Water Temperature of the Coast Fork Willamette River in Cottage Grove, OR

Current Water Temperature

50.5°F

Measurement Time: Saturday, April 18, 2026, 3:20 AM PDT

Temperature Locations

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Local Points of Interest

Cottage Grove Lake; Cottage Grove Dam

Coast Fork Willamette River

Station Name: COAST FORK WILLAMETTE R BLW COTTAGE GROVE DAM, OR
Data Source: Water Data - usgc.gov

Elevation Above Sea Level: 738 feet

Nearest Address:
75800 Reservoir Rd
Cottage Grove, OR 97424
Lane County

GPS Coordinates: 43.72067785, -123.0497994

Nearby Water Temperatures

Coast Fork Willamette River, London, OR (5.8 mi)
Row River, Cottage Grove, OR (5.8 mi)
Row River, Dorena, OR (8.9 mi)
Middle Fork Willamette River, Fall Creek, OR (18.8 mi)
Cedar Creek, Thurston, OR (24.3 mi)
McKenzie River, Springfield, OR (24.6 mi)
Middle Fork Willamette River, Oakridge, OR (25 mi)
Camp Creek, Springfield, OR (25.5 mi)
Willamette River , Eugene, OR (25.8 mi)
Rock Creek, Glide, OR (26 mi)
McKenzie River, Eugene, OR (27.1 mi)
North Fork Middle Fork Willamette River, Westfir, OR (27.3 mi)
North Umpqua River, Idleyld Park, OR (27.5 mi)
McKenzie River, Walterville, OR (27.8 mi)
Long Tom River, Alvadore, OR (30.5 mi)

Weather for Cottage Grove, Oregon

Current Weather

52°F
Partly cloudy
Partly cloudy
52.6°F
58.3°F
63%
N 2.2 mph
6.7 mph
58.3°F
39.3°F
0 in
75%
9 mi
1017 mbar
3.1

Five Day Weather Forecast

Sunny
Sat
H: 74°F
L: 41°F
Cloudy
Sun
H: 68°F
L: 45°F
Patchy rain nearby
Mon
H: 71°F
L: 44°F
Patchy rain nearby
Tue
H: 68°F
L: 42°F
Heavy rain
Wed
H: 48°F
L: 43°F

Air Quality

AQI: 1 - Good
PM2.5: 5.15 μg/m3
PM10: 10.45 μg/m3
Carbon Monoxide: 155.85 μg/m3
Nitrogen Dioxide: 1.85 μg/m3
Sulphur Dioxide: 1.35 μg/m3
Ozone: 113 μg/m3

Astronomical

Sunrise: 6:24 AM
Sun Transit: 1:11 PM
Sunset: 8:00 PM
Daylight: 13 hrs 35 mins
Moonrise: 6:42 AM
Moon Transit: 2:21 PM
Moonset: 10:17 PM
Moon Phase: New
Moon Illumination: 1.2%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
1:51 PM - 4:21 PM

Minor Periods

9:47 PM - 11:17 PM
6:12 AM - 7:42 AM

Action Rating: 4 out of 5

Frost Advisory issued April 18 at 2:43AM PDT until April 18 at 8:00AM PDT by NWS Portland OR

Effective: Sat April 18, 2026, 2:43 AM
Expires: Sat April 18, 2026, 8:00 AM

* WHAT...Temperatures as low as 34 to 36 degrees will result in frost formation. * WHERE...South Willamette Valley. * WHEN...Until 8 AM PDT this morning. * 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.
Saturday, April 18, 2026

Weather Forecast

Sunny
74.1°F
41°F
56.1°F
54%
0 in
0%
0%
4.5 mph
7.1


Air Quality

AQI: 1 - Good
PM2.5: 8.14 μg/m3
PM10: 10.69 μg/m3
Carbon Monoxide: 201.61 μg/m3
Nitrogen Dioxide: 10.69 μg/m3
Sulphur Dioxide: 1.74 μg/m3
Ozone: 63.6 μg/m3

Astronomical

Sunrise: 6:24 AM
Sun Transit: 1:11 PM
Sunset: 8:00 PM
Daylight: 13 hrs 35 mins
Moonrise: 6:42 AM
Moon Transit: 2:21 PM
Moonset: 10:17 PM
Moon Phase: New
Moon Illumination: 1.2%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
1:51 PM - 4:21 PM

Minor Periods

9:47 PM - 11:17 PM
6:12 AM - 7:42 AM

Action Rating: 4 out of 5

Sunday, April 19, 2026

Weather Forecast

Cloudy
68°F
44.7°F
54.1°F
68%
0 in
0%
0%
7.8 mph
5.4


Air Quality

AQI: 1 - Good
PM2.5: 6.55 μg/m3
PM10: 9.99 μg/m3
Carbon Monoxide: 194.37 μg/m3
Nitrogen Dioxide: 9.42 μg/m3
Sulphur Dioxide: 1.6 μg/m3
Ozone: 65.28 μg/m3

Astronomical

Sunrise: 6:23 AM
Sun Transit: 1:11 PM
Sunset: 8:01 PM
Daylight: 13 hrs 38 mins
Moonrise: 7:18 AM
Moon Transit: 3:22 PM
Moonset: 11:38 PM
Moon Phase: Waxing Crescent
Moon Illumination: 4.9%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
2:52 PM - 5:22 PM

Minor Periods

12:00 AM - 12:00 AM
6:48 AM - 8:18 AM

Action Rating: 3 out of 5

Monday, April 20, 2026

Weather Forecast

Patchy rain nearby
70.6°F
43.5°F
54.1°F
76%
0.02 in
85%
0%
9.2 mph
6.6


Air Quality

AQI: 1 - Good
PM2.5: 5.22 μg/m3
PM10: 9.78 μg/m3
Carbon Monoxide: 177.37 μg/m3
Nitrogen Dioxide: 8.37 μg/m3
Sulphur Dioxide: 1.57 μg/m3
Ozone: 63 μg/m3

Astronomical

Sunrise: 6:21 AM
Sun Transit: 1:11 PM
Sunset: 8:02 PM
Daylight: 13 hrs 41 mins
Moonrise: 8:07 AM
Moon Transit: 4:27 PM
Moonset: 12:38 AM
Moon Phase: Waxing Crescent
Moon Illumination: 10.8%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
3:57 PM - 6:27 PM

Minor Periods

7:37 AM - 9:07 AM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Tuesday, April 21, 2026

Weather Forecast

Patchy rain nearby
68°F
42.2°F
50.1°F
91%
0.11 in
88%
0%
6 mph
3.9


Air Quality

AQI: 1 - Good
PM2.5: 3.31 μg/m3
PM10: 5.29 μg/m3
Carbon Monoxide: 156.95 μg/m3
Nitrogen Dioxide: 4.41 μg/m3
Sulphur Dioxide: 1.22 μg/m3
Ozone: 80.36 μg/m3

Astronomical

Sunrise: 6:19 AM
Sun Transit: 1:10 PM
Sunset: 8:03 PM
Daylight: 13 hrs 44 mins
Moonrise: 9:08 AM
Moon Transit: 5:32 PM
Moonset: 12:52 AM
Moon Phase: Waxing Crescent
Moon Illumination: 18.8%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
5:02 PM - 7:32 PM

Minor Periods

8:38 AM - 10:08 AM
12:22 AM - 1:52 AM

Action Rating: 2 out of 5

Wednesday, April 22, 2026

Weather Forecast

Heavy rain
48.1°F
43.2°F
46.6°F
97%
0.91 in
87%
0%
8.3 mph
0


Air Quality

AQI: 1 - Good
PM2.5: 4.14 μg/m3
PM10: 5.83 μg/m3
Carbon Monoxide: 174.79 μg/m3
Nitrogen Dioxide: 6.62 μg/m3
Sulphur Dioxide: 1.3 μg/m3
Ozone: 65.38 μg/m3

Astronomical

Sunrise: 6:18 AM
Sun Transit: 1:10 PM
Sunset: 8:05 PM
Daylight: 13 hrs 47 mins
Moonrise: 10:20 AM
Moon Transit: 6:34 PM
Moonset: 1:51 AM
Moon Phase: Waxing Crescent
Moon Illumination: 28.4%

Best Times for Fishing or Hunting

Major Periods

12:57 AM - 3:27 AM
6:04 PM - 8:34 PM

Minor Periods

9:50 AM - 11:20 AM
1:21 AM - 2:51 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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