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

Current Water Temperature

67.3°F

Measurement Time: Tuesday, August 4, 2026, 11:50 PM 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

62.6°F
Smoky haze
Smoky haze
60.6°F
62.6°F
53%
ESE 2.2 mph
3.8 mph
62.6°F
45.5°F
0 in
0%
6 mi
1012 mbar
0.1

Five Day Weather Forecast

Smoky haze
Wed
H: 102°F
L: 62°F
Sunny
Thu
H: 96°F
L: 55°F
Sunny
Fri
H: 91°F
L: 50°F
Sunny
Sat
H: 89°F
L: 52°F
Sunny
Sun
H: 85°F
L: 48°F

Air Quality

AQI: 1 - Good
PM2.5: 46.1 μg/m3
PM10: 47.1 μg/m3
Carbon Monoxide: 326 μg/m3
Nitrogen Dioxide: 13.2 μg/m3
Sulphur Dioxide: 1.8 μg/m3
Ozone: 76 μg/m3

Astronomical

Sunrise: 6:06 AM
Sun Transit: 1:18 PM
Sunset: 8:30 PM
Daylight: 14 hrs 24 mins
Moonrise: 12:04 AM
Moon Transit: 6:24 AM
Moonset: 2:00 PM
Moon Phase: Last Quarter
Moon Illumination: 43.2%

Best Times for Fishing or Hunting

Major Periods

5:54 AM - 8:24 AM
1:46 PM - 4:16 PM

Minor Periods

1:30 PM - 3:00 PM
12:00 AM - 12:00 AM

Action Rating: 3 out of 5

Air Quality Alert issued August 4 at 12:38PM PDT by NWS Medford OR

Effective: Tue August 4, 2026, 12:38 PM
Expires: Wed August 5, 2026, 12:45 PM

Oregon Department of Environmental Quality has issued an Air Quality Advisory...in effect until further notice for eastern Douglas County... The Castle Fire and wildfires to the north combined with northerly winds will cause air quality levels to lower through the next few days. Smoke levels will change over the next few days due to varying wind direction and fire activity. Some improvement is expected towards the end of the week. People at risk include infants and young children, people with heart or lung disease, older adults and pregnant people. People can take the following precautions to protect their health: * Follow local burn restrictions to prevent deteriorating air quality. * Avoid strenuous outdoor activity during periods of poor air quality. * People with heart or lung problems and young children are especially vulnerable. These people should stay indoors while smoke levels are high. * Use certified High Efficiency Particulate Air (HEPA) filters in indoor heating, ventilation, cooling and air purification systems. For additional information...please visit the web site at https://oregonsmoke.org
Wednesday, August 5, 2026

Weather Forecast

Smoky haze
101.5°F
62.4°F
78.3°F
35%
0 in
1%
0%
5.1 mph
6.7


Air Quality

AQI: 3 - Unhealthy for Sensitive Groups
PM2.5: 46.14 μg/m3
PM10: 47.47 μg/m3
Carbon Monoxide: 299.58 μg/m3
Nitrogen Dioxide: 5.64 μg/m3
Sulphur Dioxide: 2.19 μg/m3
Ozone: 130.83 μg/m3

Astronomical

Sunrise: 6:06 AM
Sun Transit: 1:18 PM
Sunset: 8:30 PM
Daylight: 14 hrs 24 mins
Moonrise: 12:04 AM
Moon Transit: 6:24 AM
Moonset: 2:00 PM
Moon Phase: Last Quarter
Moon Illumination: 43.2%

Best Times for Fishing or Hunting

Major Periods

5:54 AM - 8:24 AM
1:46 PM - 4:16 PM

Minor Periods

1:30 PM - 3:00 PM
12:00 AM - 12:00 AM

Action Rating: 3 out of 5

Thursday, August 6, 2026

Weather Forecast

Sunny
95.9°F
54.5°F
72.7°F
43%
0 in
1%
0%
9.4 mph
5.7


Air Quality

AQI: 2 - Moderate
PM2.5: 22.58 μg/m3
PM10: 25.68 μg/m3
Carbon Monoxide: 218.5 μg/m3
Nitrogen Dioxide: 3.7 μg/m3
Sulphur Dioxide: 1.6 μg/m3
Ozone: 86.17 μg/m3

Astronomical

Sunrise: 6:07 AM
Sun Transit: 1:18 PM
Sunset: 8:29 PM
Daylight: 14 hrs 22 mins
Moonrise: 12:33 AM
Moon Transit: 7:18 AM
Moonset: 3:17 PM
Moon Phase: Last Quarter
Moon Illumination: 32.3%

Best Times for Fishing or Hunting

Major Periods

6:48 AM - 9:18 AM
2:42 PM - 5:12 PM

Minor Periods

2:47 PM - 4:17 PM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Friday, August 7, 2026

Weather Forecast

Sunny
91.3°F
49.7°F
69.8°F
41%
0 in
1%
0%
7.6 mph
8


Air Quality

AQI: 1 - Good
PM2.5: 10.4 μg/m3
PM10: 13.31 μg/m3
Carbon Monoxide: 126.79 μg/m3
Nitrogen Dioxide: 2.9 μg/m3
Sulphur Dioxide: 0.74 μg/m3
Ozone: 70.58 μg/m3

Astronomical

Sunrise: 6:08 AM
Sun Transit: 1:17 PM
Sunset: 8:28 PM
Daylight: 14 hrs 19 mins
Moonrise: 12:11 AM
Moon Transit: 8:17 AM
Moonset: 4:35 PM
Moon Phase: Last Quarter
Moon Illumination: 22.2%

Best Times for Fishing or Hunting

Major Periods

7:47 AM - 10:17 AM
3:42 PM - 6:12 PM

Minor Periods

4:05 PM - 5:35 PM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Saturday, August 8, 2026

Weather Forecast

Sunny
88.5°F
51.8°F
69.2°F
44%
0 in
1%
0%
7.8 mph
8


Air Quality

AQI: 1 - Good
PM2.5: 8.23 μg/m3
PM10: 10.78 μg/m3
Carbon Monoxide: 106.64 μg/m3
Nitrogen Dioxide: 3.57 μg/m3
Sulphur Dioxide: 0.73 μg/m3
Ozone: 62.42 μg/m3

Astronomical

Sunrise: 6:09 AM
Sun Transit: 1:17 PM
Sunset: 8:26 PM
Daylight: 14 hrs 17 mins
Moonrise: 1:00 AM
Moon Transit: 9:20 AM
Moonset: 5:44 PM
Moon Phase: Waning Crescent
Moon Illumination: 13.6%

Best Times for Fishing or Hunting

Major Periods

8:50 AM - 11:20 AM
4:46 PM - 7:16 PM

Minor Periods

5:14 PM - 6:44 PM
12:30 AM - 2:00 AM

Action Rating: 2 out of 5

Sunday, August 9, 2026

Weather Forecast

Sunny
84.5°F
48.2°F
65°F
52%
0 in
2%
0%
7.6 mph
7


Air Quality

AQI: 1 - Good
PM2.5: 10.5 μg/m3
PM10: 14.15 μg/m3
Carbon Monoxide: 109.33 μg/m3
Nitrogen Dioxide: 4.95 μg/m3
Sulphur Dioxide: 0.7 μg/m3
Ozone: 46 μg/m3

Astronomical

Sunrise: 6:10 AM
Sun Transit: 1:17 PM
Sunset: 8:25 PM
Daylight: 14 hrs 14 mins
Moonrise: 2:03 AM
Moon Transit: 10:25 AM
Moonset: 6:43 PM
Moon Phase: Waning Crescent
Moon Illumination: 6.8%

Best Times for Fishing or Hunting

Major Periods

5:51 PM - 8:21 PM
9:55 AM - 12:25 AM

Minor Periods

6:13 PM - 7:43 PM
1:33 AM - 3:03 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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