Water Temperature of the Middle Santiam River in Foster, OR

Current Water Temperature

46.0°F

Measurement Time: Tuesday, July 21, 2026, 8:30 PM 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

75.6°F
Clear
Clear
65.8°F
77.1°F
44%
E 4.5 mph
9.4 mph
75.6°F
52.2°F
0 in
0%
6 mi
1013 mbar
0

Five Day Weather Forecast

Sunny
Wed
H: 97°F
L: 58°F
Sunny
Thu
H: 81°F
L: 51°F
Sunny
Fri
H: 84°F
L: 49°F
Patchy rain nearby
Sat
H: 72°F
L: 45°F
Sunny
Sun
H: 79°F
L: 44°F

Air Quality

AQI: 1 - Good
PM2.5: 20.3 μg/m3
PM10: 22.3 μg/m3
Carbon Monoxide: 165 μg/m3
Nitrogen Dioxide: 6.6 μg/m3
Sulphur Dioxide: 0.4 μg/m3
Ozone: 72 μg/m3

Astronomical

Sunrise: 5:47 AM
Sun Transit: 1:16 PM
Sunset: 8:46 PM
Daylight: 15 hrs mins
Moonrise: 3:30 PM
Moon Transit: 8:06 PM
Moonset: 12:10 AM
Moon Phase: First Quarter
Moon Illumination: 55.0%

Best Times for Fishing or Hunting

Major Periods

2:44 AM - 5:14 AM
7:36 PM - 10:06 PM

Minor Periods

3:00 PM - 4:30 PM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Heat Advisory issued July 21 at 10:47AM PDT until July 21 at 11:00PM PDT by NWS Portland OR

Effective: Tue July 21, 2026, 10:47 AM
Expires: Tue July 21, 2026, 11:00 PM

* WHAT...High temperature today of 95 to 98 degrees F. * WHERE...Cascade Foothills of Marion and Linn Counties and Linn County Lowlands. * WHEN...Until 11 PM PDT this evening. * IMPACTS...Hot temperatures may cause heat illnesses. * ADDITIONAL DETAILS...Smoke from area fires and incoming cloud cover may reduce temperatures in some locations. However, there remains a high probability of temperatures meeting Major HeatRisk today. This is especially true within the valleys.

Drink plenty of fluids, stay in a cool place during the heat of the day, stay out of the sunshine, and check up on relatives and neighbors. For those without air conditioning, use fans to keep air moving. Keeps windows closed during the day and open at night, unless air quality is degraded due to wildfire smoke. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke. Do not leave young children and pets in unattended vehicles. Car interiors will reach lethal temperatures in a matter of minutes.


Wednesday, July 22, 2026

Weather Forecast

Sunny
97.3°F
58.4°F
79.1°F
53%
0.03 in
36%
0%
8.5 mph
8.5


Air Quality

AQI: 2 - Moderate
PM2.5: 19.14 μg/m3
PM10: 21.18 μg/m3
Carbon Monoxide: 166.29 μg/m3
Nitrogen Dioxide: 3.08 μg/m3
Sulphur Dioxide: 0.52 μg/m3
Ozone: 86.54 μg/m3

Astronomical

Sunrise: 5:47 AM
Sun Transit: 1:16 PM
Sunset: 8:46 PM
Daylight: 15 hrs mins
Moonrise: 3:30 PM
Moon Transit: 8:06 PM
Moonset: 12:10 AM
Moon Phase: First Quarter
Moon Illumination: 55.0%

Best Times for Fishing or Hunting

Major Periods

2:44 AM - 5:14 AM
7:36 PM - 10:06 PM

Minor Periods

3:00 PM - 4:30 PM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Thursday, July 23, 2026

Weather Forecast

Sunny
81.1°F
51°F
66.1°F
73%
0 in
9%
0%
6.9 mph
7.9


Air Quality

AQI: 1 - Good
PM2.5: 5.2 μg/m3
PM10: 6.03 μg/m3
Carbon Monoxide: 96.04 μg/m3
Nitrogen Dioxide: 3.67 μg/m3
Sulphur Dioxide: 0.48 μg/m3
Ozone: 48.88 μg/m3

Astronomical

Sunrise: 5:48 AM
Sun Transit: 1:16 PM
Sunset: 8:45 PM
Daylight: 14 hrs 58 mins
Moonrise: 4:37 PM
Moon Transit: 8:54 PM
Moonset: 12:36 AM
Moon Phase: First Quarter
Moon Illumination: 66.1%

Best Times for Fishing or Hunting

Major Periods

3:31 AM - 6:01 AM
8:24 PM - 10:54 PM

Minor Periods

4:07 PM - 5:37 PM
12:06 AM - 1:36 AM

Action Rating: 4 out of 5

Friday, July 24, 2026

Weather Forecast

Sunny
83.8°F
49.4°F
65.6°F
70%
0 in
8%
0%
7.2 mph
8.9


Air Quality

AQI: 1 - Good
PM2.5: 4.43 μg/m3
PM10: 5.38 μg/m3
Carbon Monoxide: 100.63 μg/m3
Nitrogen Dioxide: 4.67 μg/m3
Sulphur Dioxide: 0.43 μg/m3
Ozone: 58.96 μg/m3

Astronomical

Sunrise: 5:49 AM
Sun Transit: 1:16 PM
Sunset: 8:44 PM
Daylight: 14 hrs 56 mins
Moonrise: 5:39 PM
Moon Transit: 9:44 PM
Moonset: 1:08 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 76.3%

Best Times for Fishing or Hunting

Major Periods

4:20 AM - 6:50 AM
9:14 PM - 11:44 PM

Minor Periods

5:09 PM - 6:39 PM
12:38 AM - 2:08 AM

Action Rating: 3 out of 5

Saturday, July 25, 2026

Weather Forecast

Patchy rain nearby
72°F
44.7°F
58.7°F
76%
0.01 in
25%
0%
9.2 mph
6


Air Quality

AQI: 1 - Good
PM2.5: 5.03 μg/m3
PM10: 6.6 μg/m3
Carbon Monoxide: 95.99 μg/m3
Nitrogen Dioxide: 3.63 μg/m3
Sulphur Dioxide: 0.5 μg/m3
Ozone: 54.46 μg/m3

Astronomical

Sunrise: 5:50 AM
Sun Transit: 1:16 PM
Sunset: 8:43 PM
Daylight: 14 hrs 54 mins
Moonrise: 6:35 PM
Moon Transit: 10:36 PM
Moonset: 1:48 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 85.2%

Best Times for Fishing or Hunting

Major Periods

5:10 AM - 7:40 AM
12:00 AM - 12:00 AM

Minor Periods

6:05 PM - 7:35 PM
1:18 AM - 2:48 AM

Action Rating: 2 out of 5

Sunday, July 26, 2026

Weather Forecast

Sunny
78.8°F
44.3°F
62.5°F
70%
0 in
9%
0%
6.3 mph
7


Air Quality

AQI: 1 - Good
PM2.5: 4.33 μg/m3
PM10: 5.72 μg/m3
Carbon Monoxide: 99.17 μg/m3
Nitrogen Dioxide: 9.77 μg/m3
Sulphur Dioxide: 0.33 μg/m3
Ozone: 34.83 μg/m3

Astronomical

Sunrise: 5:51 AM
Sun Transit: 1:16 PM
Sunset: 8:42 PM
Daylight: 14 hrs 52 mins
Moonrise: 7:23 PM
Moon Transit: 11:27 PM
Moonset: 2:38 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 92.3%

Best Times for Fishing or Hunting

Major Periods

6:02 AM - 8:32 AM
12:00 AM - 12:00 AM

Minor Periods

6:53 PM - 8:23 PM
2:08 AM - 3:38 AM

Action Rating: 4 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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