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

Current Water Temperature

52.2°F

Measurement Time: Tuesday, July 21, 2026, 5:20 PM PDT

Temperature Locations

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Local Points of Interest

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

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

78.1°F
Clear
Clear
79.5°F
80.5°F
56%
ESE 2.9 mph
6.1 mph
79.2°F
59.9°F
0 in
0%
9 mi
1012 mbar
0

Five Day Weather Forecast

Sunny
Wed
H: 91°F
L: 58°F
Sunny
Thu
H: 86°F
L: 55°F
Sunny
Fri
H: 87°F
L: 52°F
Sunny
Sat
H: 76°F
L: 49°F
Partly Cloudy
Sun
H: 80°F
L: 48°F

Air Quality

AQI: 1 - Good
PM2.5: 28.5 μg/m3
PM10: 32.8 μg/m3
Carbon Monoxide: 175 μg/m3
Nitrogen Dioxide: 7.9 μg/m3
Sulphur Dioxide: 1.1 μg/m3
Ozone: 85 μg/m3

Astronomical

Sunrise: 5:47 AM
Sun Transit: 1:17 PM
Sunset: 8:47 PM
Daylight: 15 hrs mins
Moonrise: 3:31 PM
Moon Transit: 8:07 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
7:37 PM - 10:07 PM

Minor Periods

3:01 PM - 4:31 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
91.2°F
58°F
78.6°F
57%
0.04 in
57%
0%
8.1 mph
8.4


Air Quality

AQI: 2 - Moderate
PM2.5: 21.08 μg/m3
PM10: 24.66 μg/m3
Carbon Monoxide: 150 μg/m3
Nitrogen Dioxide: 4.83 μg/m3
Sulphur Dioxide: 0.98 μg/m3
Ozone: 84.08 μg/m3

Astronomical

Sunrise: 5:47 AM
Sun Transit: 1:17 PM
Sunset: 8:47 PM
Daylight: 15 hrs mins
Moonrise: 3:31 PM
Moon Transit: 8:07 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
7:37 PM - 10:07 PM

Minor Periods

3:01 PM - 4:31 PM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Thursday, July 23, 2026

Weather Forecast

Sunny
86°F
55.3°F
68.7°F
70%
0 in
9%
0%
7.4 mph
7.9


Air Quality

AQI: 1 - Good
PM2.5: 1.78 μg/m3
PM10: 2.15 μg/m3
Carbon Monoxide: 97.92 μg/m3
Nitrogen Dioxide: 2.3 μg/m3
Sulphur Dioxide: 0.55 μg/m3
Ozone: 44.17 μg/m3

Astronomical

Sunrise: 5:48 AM
Sun Transit: 1:17 PM
Sunset: 8:46 PM
Daylight: 14 hrs 58 mins
Moonrise: 4:37 PM
Moon Transit: 8:55 PM
Moonset: 12:37 AM
Moon Phase: First Quarter
Moon Illumination: 66.1%

Best Times for Fishing or Hunting

Major Periods

3:30 AM - 6:00 AM
8:25 PM - 10:55 PM

Minor Periods

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

Action Rating: 4 out of 5

Friday, July 24, 2026

Weather Forecast

Sunny
86.6°F
51.6°F
67.1°F
65%
0 in
5%
0%
10.3 mph
8.7


Air Quality

AQI: 1 - Good
PM2.5: 6.05 μg/m3
PM10: 7.78 μg/m3
Carbon Monoxide: 103.17 μg/m3
Nitrogen Dioxide: 3.95 μg/m3
Sulphur Dioxide: 0.8 μg/m3
Ozone: 54.13 μg/m3

Astronomical

Sunrise: 5:49 AM
Sun Transit: 1:17 PM
Sunset: 8:45 PM
Daylight: 14 hrs 56 mins
Moonrise: 5:39 PM
Moon Transit: 9:45 PM
Moonset: 1:09 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 76.3%

Best Times for Fishing or Hunting

Major Periods

4:19 AM - 6:49 AM
9:15 PM - 11:45 PM

Minor Periods

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

Action Rating: 2 out of 5

Saturday, July 25, 2026

Weather Forecast

Sunny
76.2°F
49°F
62.7°F
67%
0 in
6%
0%
12.1 mph
6


Air Quality

AQI: 1 - Good
PM2.5: 4.84 μg/m3
PM10: 6.49 μg/m3
Carbon Monoxide: 95.78 μg/m3
Nitrogen Dioxide: 1.79 μg/m3
Sulphur Dioxide: 0.6 μg/m3
Ozone: 52.38 μg/m3

Astronomical

Sunrise: 5:50 AM
Sun Transit: 1:17 PM
Sunset: 8:44 PM
Daylight: 14 hrs 53 mins
Moonrise: 6:36 PM
Moon Transit: 10:36 PM
Moonset: 1:49 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

6:06 PM - 7:36 PM
1:19 AM - 2:49 AM

Action Rating: 2 out of 5

Sunday, July 26, 2026

Weather Forecast

Partly Cloudy
79.5°F
47.8°F
63.1°F
69%
0 in
8%
0%
7.4 mph
7


Air Quality

AQI: 1 - Good
PM2.5: 5.47 μg/m3
PM10: 7.27 μg/m3
Carbon Monoxide: 112 μg/m3
Nitrogen Dioxide: 4.05 μg/m3
Sulphur Dioxide: 0.8 μg/m3
Ozone: 42.17 μg/m3

Astronomical

Sunrise: 5:51 AM
Sun Transit: 1:17 PM
Sunset: 8:43 PM
Daylight: 14 hrs 51 mins
Moonrise: 7:23 PM
Moon Transit: 11:28 PM
Moonset: 2:39 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 92.3%

Best Times for Fishing or Hunting

Major Periods

6:01 AM - 8:31 AM
12:00 AM - 12:00 AM

Minor Periods

6:53 PM - 8:23 PM
2:09 AM - 3:39 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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