Water Temperature of the Middle Santiam River in Foster, OR

Current Water Temperature

45.1°F

Measurement Time: Friday, April 17, 2026, 11:50 AM PDT

Temperature Locations

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Local Points of Interest

Green Peter Reservoir; Green Peter Dam; Billings Park

Middle Santiam River

Station Name: MIDDLE SANTIAM R BLW GREEN PETER DAM NR FOSTER, OR
Data Source: Water Data - usgc.gov

Elevation Above Sea Level: 745 feet

Nearest Address:
Quartzville Dr
Foster, OR 97345
Linn County

GPS Coordinates: 44.44818005, -122.5503613

Nearby Water Temperatures

South Santiam River, Cascadia, OR (4.7 mi)
South Santiam River, Sweet Home, OR (7.3 mi)
Quartzville Creek, Cascadia, OR (8.5 mi)
Middle Santiam River, Cascadia, OR (9.9 mi)
South Santiam River, Waterloo, OR (13.9 mi)
Blue River, Blue River, OR (21.3 mi)
North Fork Quartz Creek, Blue River, OR (21.6 mi)
Lookout Creek, Blue River, OR (22 mi)
Blue River Lake, Blue River, OR (22 mi)
Blue River, Blue River, OR (22.5 mi)
McKenzie River, Vida, OR (22.7 mi)
North Santiam River, Mehama, OR (23.6 mi)
Little North Santiam River, Lyons, OR (23.8 mi)
Detroit Lake, Detroit, OR (23.9 mi)
North Santiam River, Niagara, OR (24.5 mi)

Weather for Foster, Oregon

Current Weather

53.4°F
Sunny
Sunny
53.2°F
53.4°F
78%
NW 2.9 mph
4.3 mph
53.2°F
49.6°F
0 in
0%
6 mi
1019 mbar
0.2

Five Day Weather Forecast

Sunny
Fri
H: 58°F
L: 36°F
Overcast
Sat
H: 68°F
L: 44°F
Overcast
Sun
H: 69°F
L: 47°F
Overcast
Mon
H: 75°F
L: 45°F
Moderate rain
Tue
H: 62°F
L: 42°F

Air Quality

AQI: 1 - Good
PM2.5: 5.65 μg/m3
PM10: 7.45 μg/m3
Carbon Monoxide: 197.85 μg/m3
Nitrogen Dioxide: 8.55 μg/m3
Sulphur Dioxide: 0.95 μg/m3
Ozone: 44 μg/m3

Astronomical

Sunrise: 6:23 AM
Sun Transit: 1:09 PM
Sunset: 7:58 PM
Daylight: 13 hrs 35 mins
Moonrise: 6:09 AM
Moon Transit: 1:22 PM
Moonset: 8:53 PM
Moon Phase: New
Moon Illumination: 4.1%

Best Times for Fishing or Hunting

Major Periods

8:49 PM - 11:19 PM
12:52 AM - 3:22 PM

Minor Periods

8:23 PM - 9:53 PM
5:39 AM - 7:09 AM

Action Rating: 4 out of 5

Frost Advisory issued April 17 at 10:21AM PDT until April 18 at 8:00AM PDT by NWS Portland OR

Effective: Fri April 17, 2026, 10:21 AM
Expires: Sat April 18, 2026, 1:15 AM

* WHAT...Temperatures as low as 34 to 36 degrees will result in frost formation. * WHERE...South Willamette Valley. * WHEN...From 1 AM to 8 AM PDT Saturday. * 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.
Friday, April 17, 2026

Weather Forecast

Sunny
58.3°F
35.8°F
47°F
72%
0 in
0%
0%
4.9 mph
1.5


Air Quality

AQI: 1 - Good
PM2.5: 3.75 μg/m3
PM10: 5.13 μg/m3
Carbon Monoxide: 174.01 μg/m3
Nitrogen Dioxide: 3.32 μg/m3
Sulphur Dioxide: 1.12 μg/m3
Ozone: 83.16 μg/m3

Astronomical

Sunrise: 6:23 AM
Sun Transit: 1:09 PM
Sunset: 7:58 PM
Daylight: 13 hrs 35 mins
Moonrise: 6:09 AM
Moon Transit: 1:22 PM
Moonset: 8:53 PM
Moon Phase: New
Moon Illumination: 4.1%

Best Times for Fishing or Hunting

Major Periods

8:49 PM - 11:19 PM
12:52 AM - 3:22 PM

Minor Periods

8:23 PM - 9:53 PM
5:39 AM - 7:09 AM

Action Rating: 4 out of 5

Saturday, April 18, 2026

Weather Forecast

Overcast
67.8°F
44.2°F
54.8°F
57%
0 in
0%
0%
6.5 mph
1.8


Air Quality

AQI: 1 - Good
PM2.5: 4.56 μg/m3
PM10: 7.31 μg/m3
Carbon Monoxide: 179.37 μg/m3
Nitrogen Dioxide: 4.63 μg/m3
Sulphur Dioxide: 1.09 μg/m3
Ozone: 75.36 μg/m3

Astronomical

Sunrise: 6:21 AM
Sun Transit: 1:09 PM
Sunset: 7:59 PM
Daylight: 13 hrs 38 mins
Moonrise: 6:37 AM
Moon Transit: 2:19 PM
Moonset: 10:18 PM
Moon Phase: New
Moon Illumination: 1.2%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
1:49 PM - 4:19 PM

Minor Periods

9:48 PM - 11:18 PM
6:07 AM - 7:37 AM

Action Rating: 4 out of 5

Sunday, April 19, 2026

Weather Forecast

Overcast
69.3°F
47.1°F
58.5°F
61%
0 in
0%
0%
7.2 mph
1.4


Air Quality

AQI: 1 - Good
PM2.5: 4.69 μg/m3
PM10: 8.8 μg/m3
Carbon Monoxide: 187.01 μg/m3
Nitrogen Dioxide: 4.95 μg/m3
Sulphur Dioxide: 1.15 μg/m3
Ozone: 73.72 μg/m3

Astronomical

Sunrise: 6:19 AM
Sun Transit: 1:09 PM
Sunset: 8:00 PM
Daylight: 13 hrs 41 mins
Moonrise: 7:13 AM
Moon Transit: 3:20 PM
Moonset: 11:40 PM
Moon Phase: Waxing Crescent
Moon Illumination: 4.9%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
2:50 PM - 5:20 PM

Minor Periods

12:00 AM - 12:00 AM
6:43 AM - 8:13 AM

Action Rating: 3 out of 5

Monday, April 20, 2026

Weather Forecast

Overcast
75.2°F
44.6°F
58.1°F
65%
0 in
0%
0%
7.4 mph
1.5


Air Quality

AQI: 1 - Good
PM2.5: 5.43 μg/m3
PM10: 9.37 μg/m3
Carbon Monoxide: 183.11 μg/m3
Nitrogen Dioxide: 4.77 μg/m3
Sulphur Dioxide: 1.47 μg/m3
Ozone: 72.96 μg/m3

Astronomical

Sunrise: 6:18 AM
Sun Transit: 1:09 PM
Sunset: 8:01 PM
Daylight: 13 hrs 44 mins
Moonrise: 8:02 AM
Moon Transit: 4:25 PM
Moonset: 12:40 AM
Moon Phase: Waxing Crescent
Moon Illumination: 10.8%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
3:55 PM - 6:25 PM

Minor Periods

7:32 AM - 9:02 AM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Tuesday, April 21, 2026

Weather Forecast

Moderate rain
62°F
42.3°F
50.8°F
86%
0.2 in
87%
0%
7.6 mph
1.1


Air Quality

AQI: 1 - Good
PM2.5: 1.51 μg/m3
PM10: 1.81 μg/m3
Carbon Monoxide: 150 μg/m3
Nitrogen Dioxide: 2.1 μg/m3
Sulphur Dioxide: 1 μg/m3
Ozone: 87.46 μg/m3

Astronomical

Sunrise: 6:16 AM
Sun Transit: 1:08 PM
Sunset: 8:03 PM
Daylight: 13 hrs 46 mins
Moonrise: 9:03 AM
Moon Transit: 5:30 PM
Moonset: 12:53 AM
Moon Phase: Waxing Crescent
Moon Illumination: 18.8%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
5:00 PM - 7:30 PM

Minor Periods

8:33 AM - 10:03 AM
12:23 AM - 1:53 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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