Water Temperature of the South Santiam River in Sweet Home, OR

Current Water Temperature

44.6°F

Measurement Time: Tuesday, December 30, 2025, 2:50 AM PST

Temperature Locations

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Local Points of Interest

Foster Reservoir; Foster Dam; Andrew Wiley Park; Camp Koinonia

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South Santiam River

Station Name: SOUTH SANTIAM RIVER NEAR FOSTER, OR
Data Source: Water Data - usgc.gov

Elevation Above Sea Level: 564 feet

Nearest Address:
42853 Green River Dr
Sweet Home, OR 97386
Linn County

GPS Coordinates: 44.4123468, -122.6886956

Nearby Water Temperatures

Middle Santiam River, Foster, OR (7.3 mi)
South Santiam River, Waterloo, OR (8.9 mi)
South Santiam River, Cascadia, OR (9.5 mi)
Quartzville Creek, Cascadia, OR (15.3 mi)
Middle Santiam River, Cascadia, OR (17.2 mi)
McKenzie River, Vida, OR (22.6 mi)
McKenzie River, Walterville, OR (24 mi)
North Fork Quartz Creek, Blue River, OR (24.3 mi)
Blue River Lake, Blue River, OR (24.5 mi)
Blue River, Blue River, OR (24.6 mi)
North Santiam River, Jefferson, OR (24.8 mi)
Blue River, Blue River, OR (24.9 mi)
North Santiam River, Mehama, OR (25.3 mi)
Camp Creek, Springfield, OR (25.5 mi)
Lookout Creek, Blue River, OR (25.5 mi)

Weather for Sweet Home, Oregon

Current Weather

43.3°F
Sunny
Sunny
88%
°F
°F
NNW 0.6 mph
mph
°F
1023.34 millibars
43.3°F
0%
0 in
0%
10 mi
1

Five Day Weather Forecast

Sunny
Tue
H: 55°F
L: 34°F
Overcast
Wed
H: 52°F
L: 42°F
Heavy rain
Thu
H: 48°F
L: 43°F
Patchy rain nearby
Fri
H: 57°F
L: 41°F
Moderate rain
Sat
H: 45°F
L: 36°F

Air Quality

AQI: 1 - Good
PM2.5: 9.15 μg/m3
PM10: 9.35 μg/m3
Carbon Monoxide: 332.85 μg/m3
Nitrogen Dioxide: 23.85 μg/m3
Sulphur Dioxide: 2.05 μg/m3
Ozone: 9 μg/m3

Astronomical

Sunrise: 7:47 AM
Sun Transit: 12:13 AM
Sunset: 4:41 PM
Daylight: 8 hrs 54 mins
Moonrise: 1:03 PM
Moon Transit: 8:56 PM
Moonset: 3:40 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 82.8%

Best Times for Fishing or Hunting

Major Periods

3:24 AM - 5:54 AM
8:26 PM - 10:56 PM

Minor Periods

12:33 AM - 2:03 PM
3:10 AM - 4:40 AM

Action Rating: 2 out of 5

Dense Fog Advisory issued December 30 at 4:24AM PST until December 30 at 10:00AM PST by NWS Portland OR

Effective: Tue December 30, 2025, 4:24 AM
Expires: Tue December 30, 2025, 10:00 AM

* WHAT...Visibility one quarter mile or less in dense freezing fog. * WHERE...Lower Columbia River and Cowlitz River Valleys, and Lane County Lowlands. * WHEN...Until 10 AM PST this morning. * IMPACTS...Low visibility could make driving conditions hazardous. Some areas could see slick surfaces. Especially on raised, metal surfaces. * ADDITIONAL DETAILS...With temperatures currently at or near freezing. Expect dense freezing fog.

If driving, slow down, use your headlights, and leave plenty of distance ahead of you. If driving, slow down and leave plenty of distance ahead of you. Pedestrians and cyclists should wear bright or reflective clothing to increase the chances of being seen by others in poor visibility conditions.
Tuesday, December 30, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 42.5°F
Average Humidity: 80%
Chance of Rain: 0%
Wind: 3.4 mph
UV Index: 0.2

Air Quality

AQI: 1 - Good
PM2.5: 4.31 μg/m3
PM10: 4.38 μg/m3
Carbon Monoxide: 232.61 μg/m3
Nitrogen Dioxide: 10.12 μg/m3
Sulphur Dioxide: 1.55 μg/m3
Ozone: 27.4 μg/m3

Astronomical

Sunrise: 7:47 AM
Sun Transit: 12:13 AM
Sunset: 4:41 PM
Daylight: 8 hrs 54 mins
Moonrise: 1:03 PM
Moon Transit: 8:56 PM
Moonset: 3:40 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 82.8%

Best Times for Fishing or Hunting

Major Periods

3:24 AM - 5:54 AM
8:26 PM - 10:56 PM

Minor Periods

12:33 AM - 2:03 PM
3:10 AM - 4:40 AM

Action Rating: 2 out of 5

Wednesday, December 31, 2025

Weather Forecast

Conditions: Overcast
Average Temperature: 45.6°F
Average Humidity: 71%
Chance of Rain: 0%
Wind: 3.1 mph
UV Index: 0.2

Air Quality

AQI: 1 - Good
PM2.5: 5.16 μg/m3
PM10: 5.26 μg/m3
Carbon Monoxide: 245.21 μg/m3
Nitrogen Dioxide: 10.57 μg/m3
Sulphur Dioxide: 1.39 μg/m3
Ozone: 24.48 μg/m3

Astronomical

Sunrise: 7:47 AM
Sun Transit: 12:14 AM
Sunset: 4:42 PM
Daylight: 8 hrs 55 mins
Moonrise: 1:44 PM
Moon Transit: 10:00 PM
Moonset: 5:04 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 90.5%

Best Times for Fishing or Hunting

Major Periods

4:24 AM - 6:54 AM
12:00 AM - 12:00 AM

Minor Periods

1:14 PM - 2:44 PM
4:34 AM - 6:04 AM

Action Rating: 2 out of 5

Thursday, January 1, 2026

Weather Forecast

Conditions: Heavy rain
Average Temperature: 45.3°F
Average Humidity: 88%
Chance of Rain: 89%
Wind: 3.1 mph
UV Index: 0

Air Quality

AQI: 1 - Good
PM2.5: 6.6 μg/m3
PM10: 6.85 μg/m3
Carbon Monoxide: 304.05 μg/m3
Nitrogen Dioxide: 11.65 μg/m3
Sulphur Dioxide: 1.33 μg/m3
Ozone: 28.88 μg/m3

Astronomical

Sunrise: 7:47 AM
Sun Transit: 12:14 AM
Sunset: 4:42 PM
Daylight: 8 hrs 56 mins
Moonrise: 2:38 PM
Moon Transit: 11:05 PM
Moonset: 6:24 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 96.0%

Best Times for Fishing or Hunting

Major Periods

5:28 AM - 7:58 AM
12:00 AM - 12:00 AM

Minor Periods

2:08 PM - 3:38 PM
5:54 AM - 7:24 AM

Action Rating: 4 out of 5

Friday, January 2, 2026

Weather Forecast

Conditions: Patchy rain nearby
Average Temperature: 47.2°F
Average Humidity: 92%
Chance of Rain: 88%
Wind: 6.3 mph
UV Index: 2

Air Quality

AQI: 1 - Good
PM2.5: 2.8 μg/m3
PM10: 2.89 μg/m3
Carbon Monoxide: 199.66 μg/m3
Nitrogen Dioxide: 7.24 μg/m3
Sulphur Dioxide: 1.13 μg/m3
Ozone: 26.12 μg/m3

Astronomical

Sunrise: 7:47 AM
Sun Transit: 12:14 AM
Sunset: 4:43 PM
Daylight: 8 hrs 56 mins
Moonrise: 3:46 PM
Moon Transit: 12:00 AM
Moonset: 7:34 AM
Moon Phase: Full
Moon Illumination: 99.2%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
6:35 AM - 9:05 AM

Minor Periods

3:16 PM - 4:46 PM
7:04 AM - 8:34 AM

Action Rating: 4 out of 5

Saturday, January 3, 2026

Weather Forecast

Conditions: Moderate rain
Average Temperature: 42.2°F
Average Humidity: 94%
Chance of Rain: 88%
Wind: 7.6 mph
UV Index: 2

Air Quality

AQI: 1 - Good
PM2.5: 2.07 μg/m3
PM10: 2.1 μg/m3
Carbon Monoxide: 162.29 μg/m3
Nitrogen Dioxide: 5.55 μg/m3
Sulphur Dioxide: 1.18 μg/m3
Ozone: 57.54 μg/m3

Astronomical

Sunrise: 7:47 AM
Sun Transit: 12:15 AM
Sunset: 4:44 PM
Daylight: 8 hrs 57 mins
Moonrise: 5:05 PM
Moon Transit: 12:12 AM
Moonset: 8:29 AM
Moon Phase: Full
Moon Illumination: 99.9%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
7:41 AM - 10:11 AM

Minor Periods

4:35 PM - 6:05 PM
7:59 AM - 9:29 AM

Action Rating: 6 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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