Water Temperature of the South Fork Flathead River in Columbia Falls, MT

Current Water Temperature

44.1°F

Measurement Time: Saturday, May 16, 2026, 3:45 AM MDT

Temperature Locations

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Local Points of Interest

Hungry Horse, MT

South Fork Flathead River

Station Name: S F Flathead River nr Columbia Falls MT
Data Source: Water Data - usgc.gov

Elevation Above Sea Level: 3,091 feet

Nearest Address:
Columbia Falls, MT 59912
Flathead County

GPS Coordinates: 48.35657778, -114.0378583

Nearby Water Temperatures

Birch Creek, Valier, MT (78.9 mi)
Kootenai River, Troy, MT (93.7 mi)
Clark Fork, East Missoula, MT (102.4 mi)
Kootenai River, Bonners Ferry, ID (106.7 mi)
Kootenai River, Bonners Ferry, ID (111.3 mi)
Sun River, Simms, MT (114 mi)
Kootenai River, Copeland, ID (114.4 mi)
Kootenai River, Porthill, ID (121 mi)
North Fork Clearwater River, Pierce, ID (128.1 mi)
Missouri River, Wolf Creek, MT (133.2 mi)
Pend Oreille River, Metaline Falls, WA (157.3 mi)
Pend Oreille River, Metaline Falls, WA (157.6 mi)
Warm Springs Creek, Warm Springs, MT (161.4 mi)
Marias River, Loma, MT (161.8 mi)
Orofino River, Orofino, ID (166.1 mi)

Weather for Columbia Falls, Montana

Current Weather

45°F
Partly cloudy
Partly cloudy
42.2°F
43.2°F
63%
SW 5.1 mph
5.9 mph
40.1°F
35.1°F
0 in
50%
9 mi
1013 mbar
1.4

Five Day Weather Forecast

Patchy rain nearby
Sat
H: 51°F
L: 34°F
Moderate rain
Sun
H: 51°F
L: 24°F
Patchy rain nearby
Mon
H: 59°F
L: 25°F
Patchy rain nearby
Tue
H: 57°F
L: 33°F
Patchy rain nearby
Wed
H: 59°F
L: 38°F

Air Quality

AQI: 1 - Good
PM2.5: 2.05 μg/m3
PM10: 2.65 μg/m3
Carbon Monoxide: 133.85 μg/m3
Nitrogen Dioxide: 1.25 μg/m3
Sulphur Dioxide: 2.15 μg/m3
Ozone: 90 μg/m3

Astronomical

Sunrise: 5:55 AM
Sun Transit: 1:32 PM
Sunset: 9:11 PM
Daylight: 15 hrs 16 mins
Moonrise: 5:15 AM
Moon Transit: 1:25 PM
Moonset: 9:54 PM
Moon Phase: New
Moon Illumination: 2.0%

Best Times for Fishing or Hunting

Major Periods

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

Minor Periods

9:24 PM - 10:54 PM
4:45 AM - 6:15 AM

Action Rating: 5 out of 5

Winter Weather Advisory issued May 15 at 11:38AM MDT until May 18 at 12:00AM MDT by NWS Missoula MT

Effective: Fri May 15, 2026, 11:38 AM
Expires: Mon May 18, 2026, 12:00 AM

* WHAT...Snow expected. Total snow accumulations of 2 to 6 inches in the mountain terrain above 5000 feet. Slushy accumulations possible on Marias Pass. * WHERE...The higher terrain of Glacier National Park. * WHEN...From midnight Saturday Night to midnight MDT Sunday Night. * IMPACTS...Plan on slippery backcountry road conditions. Cold, wet and breezy conditions may create hypothermia risk for those recreating in the backcountry.

Slow down and use caution while traveling on high mountain roads. Pack full waterproof layers and thermal gear to ensure you stay warm and dry if recreating in the backcountry.
Saturday, May 16, 2026

Weather Forecast

Patchy rain nearby
51.4°F
33.5°F
43°F
67%
0.12 in
89%
3%
9.8 mph
5.6


Air Quality

AQI: 1 - Good
PM2.5: 2.45 μg/m3
PM10: 2.89 μg/m3
Carbon Monoxide: 134.41 μg/m3
Nitrogen Dioxide: 1.78 μg/m3
Sulphur Dioxide: 1.48 μg/m3
Ozone: 85.24 μg/m3

Astronomical

Sunrise: 5:55 AM
Sun Transit: 1:32 PM
Sunset: 9:11 PM
Daylight: 15 hrs 16 mins
Moonrise: 5:15 AM
Moon Transit: 1:25 PM
Moonset: 9:54 PM
Moon Phase: New
Moon Illumination: 2.0%

Best Times for Fishing or Hunting

Major Periods

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

Minor Periods

9:24 PM - 10:54 PM
4:45 AM - 6:15 AM

Action Rating: 5 out of 5

Sunday, May 17, 2026

Weather Forecast

Moderate rain
51.1°F
24°F
39.8°F
73%
0.2 in
87%
4%
6.5 mph
4.7


Air Quality

AQI: 1 - Good
PM2.5: 2.43 μg/m3
PM10: 2.81 μg/m3
Carbon Monoxide: 140.69 μg/m3
Nitrogen Dioxide: 2.24 μg/m3
Sulphur Dioxide: 1.83 μg/m3
Ozone: 79.12 μg/m3

Astronomical

Sunrise: 5:53 AM
Sun Transit: 1:32 PM
Sunset: 9:12 PM
Daylight: 15 hrs 19 mins
Moonrise: 5:54 AM
Moon Transit: 2:30 PM
Moonset: 11:17 PM
Moon Phase: New
Moon Illumination: 0.2%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
2:00 PM - 4:30 PM

Minor Periods

12:00 AM - 12:00 AM
5:24 AM - 6:54 AM

Action Rating: 4 out of 5

Monday, May 18, 2026

Weather Forecast

Patchy rain nearby
58.6°F
25.1°F
41.7°F
69%
0.05 in
89%
0%
4.9 mph
6.6


Air Quality

AQI: 1 - Good
PM2.5: 4.83 μg/m3
PM10: 5.49 μg/m3
Carbon Monoxide: 126.41 μg/m3
Nitrogen Dioxide: 3.86 μg/m3
Sulphur Dioxide: 1.01 μg/m3
Ozone: 81.32 μg/m3

Astronomical

Sunrise: 5:52 AM
Sun Transit: 1:32 PM
Sunset: 9:14 PM
Daylight: 15 hrs 21 mins
Moonrise: 6:49 AM
Moon Transit: 3:37 PM
Moonset: 12:17 AM
Moon Phase: New
Moon Illumination: 2.6%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
3:07 PM - 5:37 PM

Minor Periods

6:19 AM - 7:49 AM
12:00 AM - 12:00 AM

Action Rating: 4 out of 5

Tuesday, May 19, 2026

Weather Forecast

Patchy rain nearby
57.3°F
32.5°F
43.8°F
81%
0.15 in
87%
4%
4 mph
5.7


Air Quality

AQI: 1 - Good
PM2.5: 3.68 μg/m3
PM10: 4.03 μg/m3
Carbon Monoxide: 142.59 μg/m3
Nitrogen Dioxide: 3.43 μg/m3
Sulphur Dioxide: 1.11 μg/m3
Ozone: 84.16 μg/m3

Astronomical

Sunrise: 5:51 AM
Sun Transit: 1:32 PM
Sunset: 9:15 PM
Daylight: 15 hrs 24 mins
Moonrise: 7:59 AM
Moon Transit: 4:43 PM
Moonset: 12:26 AM
Moon Phase: Waxing Crescent
Moon Illumination: 7.4%

Best Times for Fishing or Hunting

Major Periods

12:19 AM - 2:49 AM
4:13 PM - 6:43 PM

Minor Periods

7:29 AM - 8:59 AM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Wednesday, May 20, 2026

Weather Forecast

Patchy rain nearby
58.5°F
37.5°F
47.8°F
80%
0.19 in
83%
0%
4.7 mph
0


Air Quality

AQI: 1 - Good
PM2.5: 4.51 μg/m3
PM10: 5.03 μg/m3
Carbon Monoxide: 152.77 μg/m3
Nitrogen Dioxide: 4.13 μg/m3
Sulphur Dioxide: 1.4 μg/m3
Ozone: 84 μg/m3

Astronomical

Sunrise: 5:50 AM
Sun Transit: 1:32 PM
Sunset: 9:16 PM
Daylight: 15 hrs 26 mins
Moonrise: 9:21 AM
Moon Transit: 5:45 PM
Moonset: 1:16 AM
Moon Phase: Waxing Crescent
Moon Illumination: 14.4%

Best Times for Fishing or Hunting

Major Periods

1:24 AM - 3:54 AM
5:15 PM - 7:45 PM

Minor Periods

8:51 AM - 10:21 AM
12:46 AM - 2:16 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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