Water Temperature of the South Santiam River in Waterloo, OR

Current Water Temperature

54.5°F

Measurement Time: Tuesday, October 14, 2025, 4:20 PM PDT

Temperature Locations

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Local Points of Interest

Waterloo Falls; Lebanon, OR

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South Santiam River

Station Name: SOUTH SANTIAM RIVER AT WATERLOO, OR
Data Source: Water Data - usgc.gov

Elevation Above Sea Level: 472 feet / 144 meters

Nearest Address:
31187 1st St
Waterloo, OR 97355
Linn County

GPS Coordinates: 44.4984564, -122.8234214

Nearby Water Temperatures

South Santiam River, Sweet Home, OR (8.9 mi)
Middle Santiam River, Foster, OR (13.9 mi)
North Santiam River, Jefferson, OR (16.2 mi)
Willamette River , Albany, OR (17.0 mi)
South Santiam River, Cascadia, OR (17.7 mi)
Quartzville Creek, Cascadia, OR (19.3 mi)
Santiam River, Jefferson, OR (20.0 mi)
North Santiam River, Mehama, OR (20.6 mi)
Middle Santiam River, Cascadia, OR (22.3 mi)
Willamette River , Harrisburg, OR (23.4 mi)
Little North Santiam River, Lyons, OR (23.5 mi)
Long Tom River, Monroe, OR (26.6 mi)
McKenzie River, Eugene, OR (28.8 mi)
Camp Creek, Springfield, OR (29.7 mi)
McKenzie River, Walterville, OR (29.7 mi)

Weather for Waterloo, Oregon

Current Weather

45°F
Clear
Conditions: Clear
Humidity: 74%
Feels Like: 43.4°F
Wind: ENE 3.6 mph
Wind Gusts: 7.5 mph
Pressure: 29.98 in
Precipitation: 0 in
Cloud Cover: 0%
Visibility: 9 mi
UV Index: 0

Five Day Weather Forecast

Sunny
Tue
H: 70°F
L: 37°F
Sunny
Wed
H: 69°F
L: 39°F
Cloudy
Thu
H: 54°F
L: 44°F
Partly Cloudy
Fri
H: 62°F
L: 48°F
Sunny
Sat
H: 67°F
L: 44°F

Air Quality

AQI: 1 - Good
PM2.5: 4.25 μg/m3
PM10: 4.35 μg/m3
Carbon Monoxide: 155.85 μg/m3
Nitrogen Dioxide: 6.15 μg/m3
Sulphur Dioxide: 1.25 μg/m3
Ozone: 32 μg/m3

Astronomical

Sunrise: 7:26 AM
Sun Transit: 12:57 AM
Sunset: 6:28 PM
Daylight: 11 hrs 3 mins
Moonrise: 12:57 AM
Moon Transit: 8:00 AM
Moonset: 3:49 PM
Moon Phase: Last Quarter
Moon Illumination: 39.8%

Best Times for Fishing or Hunting

Major Periods

7:30 AM - 10:00 AM
3:23 PM - 5:53 PM

Minor Periods

3:19 PM - 4:49 PM
12:00 AM - 12:00 AM

Action Rating: 3 out of 5

Frost Advisory issued October 14 at 2:36PM PDT until October 15 at 9:00AM PDT by NWS Portland OR

Effective: Tue October 14, 2025, 2:36 PM
Expires: Wed October 15, 2025, 5:15 AM

* WHAT...Temperatures of 32 to 36 degrees will result in frost formation. * WHERE...South Willamette Valley, North Oregon Coast Range Lowlands, East Central Willamette Valley, and Cowlitz County Lowlands. * WHEN...From 1 AM to 9 AM PDT Wednesday. * IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered. * ADDITIONAL DETAILS...The Nehalem River Valley, including Vernonia and Pittsburg, is the most likely area within the Coast Range to see temperatures fall below freezing. In those areas, there is a 70 to 90% chance of a true freeze, and a nearly 100% chance of frost, so those with agricultural interests or sensitive outdoor plants should take more substantial preventative measures.

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.
Tuesday, October 14, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 50.8°F
Average Humidity: 67%
Chance of Rain: 0%
Wind: 7.8 mph
UV Index: 0.7

Air Quality

AQI: 1 - Good
PM2.5: 3.37 μg/m3
PM10: 3.47 μg/m3
Carbon Monoxide: 176.01 μg/m3
Nitrogen Dioxide: 4.55 μg/m3
Sulphur Dioxide: 1.61 μg/m3
Ozone: 49.24 μg/m3

Astronomical

Sunrise: 7:26 AM
Sun Transit: 12:57 AM
Sunset: 6:28 PM
Daylight: 11 hrs 3 mins
Moonrise: 12:57 AM
Moon Transit: 8:00 AM
Moonset: 3:49 PM
Moon Phase: Last Quarter
Moon Illumination: 39.8%

Best Times for Fishing or Hunting

Major Periods

7:30 AM - 10:00 AM
3:23 PM - 5:53 PM

Minor Periods

3:19 PM - 4:49 PM
12:00 AM - 12:00 AM

Action Rating: 3 out of 5

Wednesday, October 15, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 51.5°F
Average Humidity: 62%
Chance of Rain: 0%
Wind: 4.3 mph
UV Index: 0.7

Air Quality

AQI: 1 - Good
PM2.5: 5.08 μg/m3
PM10: 5.36 μg/m3
Carbon Monoxide: 199.33 μg/m3
Nitrogen Dioxide: 6.5 μg/m3
Sulphur Dioxide: 1.68 μg/m3
Ozone: 46.32 μg/m3

Astronomical

Sunrise: 7:27 AM
Sun Transit: 12:56 AM
Sunset: 6:26 PM
Daylight: 11 hrs mins
Moonrise: 1:12 AM
Moon Transit: 8:50 AM
Moonset: 4:15 PM
Moon Phase: Last Quarter
Moon Illumination: 29.1%

Best Times for Fishing or Hunting

Major Periods

8:20 AM - 10:50 AM
4:13 PM - 6:43 PM

Minor Periods

3:45 PM - 5:15 PM
12:42 AM - 2:12 AM

Action Rating: 3 out of 5

Thursday, October 16, 2025

Weather Forecast

Conditions: Cloudy
Average Temperature: 49.1°F
Average Humidity: 81%
Chance of Rain: 0%
Wind: 3.6 mph
UV Index: 0.7

Air Quality

AQI: 1 - Good
PM2.5: 11.93 μg/m3
PM10: 13.16 μg/m3
Carbon Monoxide: 215.81 μg/m3
Nitrogen Dioxide: 9.84 μg/m3
Sulphur Dioxide: 1.99 μg/m3
Ozone: 50.76 μg/m3

Astronomical

Sunrise: 7:28 AM
Sun Transit: 12:56 AM
Sunset: 6:25 PM
Daylight: 10 hrs 57 mins
Moonrise: 2:24 AM
Moon Transit: 9:37 AM
Moonset: 4:36 PM
Moon Phase: Last Quarter
Moon Illumination: 19.4%

Best Times for Fishing or Hunting

Major Periods

4:58 PM - 7:28 PM
9:07 AM - 11:37 AM

Minor Periods

4:06 PM - 5:36 PM
1:54 AM - 3:24 AM

Action Rating: 2 out of 5

Friday, October 17, 2025

Weather Forecast

Conditions: Partly Cloudy
Average Temperature: 53.9°F
Average Humidity: 76%
Chance of Rain: 0%
Wind: 4.7 mph
UV Index: 0.8

Air Quality

AQI: 1 - Good
PM2.5: 8.17 μg/m3
PM10: 10.67 μg/m3
Carbon Monoxide: 164.57 μg/m3
Nitrogen Dioxide: 10.43 μg/m3
Sulphur Dioxide: 1.96 μg/m3
Ozone: 52.68 μg/m3

Astronomical

Sunrise: 7:29 AM
Sun Transit: 12:56 AM
Sunset: 6:23 PM
Daylight: 10 hrs 54 mins
Moonrise: 3:33 AM
Moon Transit: 10:20 AM
Moonset: 4:54 PM
Moon Phase: Waning Crescent
Moon Illumination: 11.3%

Best Times for Fishing or Hunting

Major Periods

5:41 PM - 8:11 PM
9:50 AM - 12:20 AM

Minor Periods

4:24 PM - 5:54 PM
3:03 AM - 4:33 AM

Action Rating: 3 out of 5

Saturday, October 18, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 54°F
Average Humidity: 68%
Chance of Rain: 0%
Wind: 7.2 mph
UV Index: 0.8

Air Quality

AQI: 1 - Good
PM2.5: 7.1 μg/m3
PM10: 8.5 μg/m3
Carbon Monoxide: 195.7 μg/m3
Nitrogen Dioxide: 11.35 μg/m3
Sulphur Dioxide: 2.03 μg/m3
Ozone: 42.69 μg/m3

Astronomical

Sunrise: 7:31 AM
Sun Transit: 12:56 AM
Sunset: 6:21 PM
Daylight: 10 hrs 51 mins
Moonrise: 4:40 AM
Moon Transit: 11:01 AM
Moonset: 5:11 PM
Moon Phase: Waning Crescent
Moon Illumination: 5.2%

Best Times for Fishing or Hunting

Major Periods

6:21 PM - 8:51 PM
10:31 AM - 1:01 PM

Minor Periods

4:41 PM - 6:11 PM
4:10 AM - 5:40 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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