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

Current Water Temperature

54.7°F

Measurement Time: Sunday, August 2, 2026, 11:45 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)
Clark Fork River, Superior, MT (89.4 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)

Weather for Columbia Falls, Montana

Current Weather

74.8°F
Sunny
Sunny
63.9°F
73.5°F
19%
W 12.5 mph
14.4 mph
74.8°F
30°F
0 in
0%
6 mi
1010 mbar
1.4

Five Day Weather Forecast

Sunny
Sun
H: 77°F
L: 59°F
Sunny
Mon
H: 70°F
L: 39°F
Sunny
Tue
H: 78°F
L: 39°F
Sunny
Wed
H: 83°F
L: 44°F
Sunny
Thu
H: 92°F
L: 47°F

Air Quality

AQI: 2 - Moderate
PM2.5: 19.4 μg/m3
PM10: 20.4 μg/m3
Carbon Monoxide: 139 μg/m3
Nitrogen Dioxide: 1.5 μg/m3
Sulphur Dioxide: 1 μg/m3
Ozone: 101 μg/m3

Astronomical

Sunrise: 6:13 AM
Sun Transit: 1:42 PM
Sunset: 9:11 PM
Daylight: 14 hrs 58 mins
Moonrise: 10:41 PM
Moon Transit: 4:50 PM
Moonset: 10:45 AM
Moon Phase: Waning Gibbous
Moon Illumination: 75.9%

Best Times for Fishing or Hunting

Major Periods

4:20 PM - 6:50 PM
4:20 PM - 6:50 PM

Minor Periods

10:11 PM - 11:41 PM
10:15 AM - 11:45 AM

Action Rating: 2 out of 5

Red Flag Warning issued August 1 at 10:11PM MDT until August 2 at 9:00PM MDT by NWS Great Falls MT

Effective: Sat August 1, 2026, 10:11 PM
Expires: Sun August 2, 2026, 3:00 PM

* AFFECTED AREA...Eastern Glacier/Toole/Central/Eastern Pondera/Liberty, Hill and Blaine Counties, Lewis and Clark National Forest Rocky Mountain District-Rocky Mountain Front, Chouteau and Fergus Counties, Lincoln Ranger District of the Helena National Forest, Central and Eastern Lewis and Clark National Forest Areas and Helena and Townsend Ranger Districts of the Helena National Forest. * WINDS...West 10 to 20 mph with gusts up to 45 mph. Along the Rocky Mountain Front, west winds 30 to 40 mph with gusts up to 60 mph and isolated cases of 75 mph. * RELATIVE HUMIDITY...As low as 10 percent. * TEMPERATURES...Up to 90. * COLD FRONT...A cold front will arrive Sunday evening and shift the winds from westerly to more northerly. * IMPACTS...Any fires that develop will spread rapidly. Containment of any ongoing or new fires may be very difficult. Outdoor burning is not recommended.

A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity, and warm temperatures can contribute to extreme fire behavior. Please advise the appropriate officials or fire crews in these areas of this Red Flag Warning.


Red Flag Warning issued August 2 at 11:58AM MDT until August 3 at 3:00AM MDT by NWS Great Falls MT

Effective: Sun August 2, 2026, 11:58 AM
Expires: Mon August 3, 2026, 3:00 AM

* AFFECTED AREA...Eastern Glacier/Toole/Central/Eastern Pondera/Liberty, Hill and Blaine Counties, Lewis and Clark National Forest Rocky Mountain District-Rocky Mountain Front, Chouteau and Fergus Counties, Lincoln Ranger District of the Helena National Forest, Central and Eastern Lewis and Clark National Forest Areas and Helena and Townsend Ranger Districts of the Helena National Forest. * WINDS...Northwest 15 to 25 mph with gusts up to 45 mph. * RELATIVE HUMIDITY...As low as 10 percent. * TEMPERATURES...Up to 90. * COLD FRONT...A cold front will arrive Sunday evening and shift the winds from westerly to more northerly. * IMPACTS...Any fires that develop will spread rapidly. Containment of any ongoing or new fires may be very difficult. Outdoor burning is not recommended.

A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity, and warm temperatures can contribute to extreme fire behavior. Please advise the appropriate officials or fire crews in these areas of this Red Flag Warning.
Sunday, August 2, 2026

Weather Forecast

Sunny
76.8°F
58.8°F
67.5°F
25%
0 in
0%
0%
13.4 mph
6.2


Air Quality

AQI: 1 - Good
PM2.5: 12.86 μg/m3
PM10: 13.57 μg/m3
Carbon Monoxide: 151.17 μg/m3
Nitrogen Dioxide: 1.9 μg/m3
Sulphur Dioxide: 0.94 μg/m3
Ozone: 84.88 μg/m3

Astronomical

Sunrise: 6:13 AM
Sun Transit: 1:42 PM
Sunset: 9:11 PM
Daylight: 14 hrs 58 mins
Moonrise: 10:41 PM
Moon Transit: 4:50 PM
Moonset: 10:45 AM
Moon Phase: Waning Gibbous
Moon Illumination: 75.9%

Best Times for Fishing or Hunting

Major Periods

4:20 PM - 6:50 PM
4:20 PM - 6:50 PM

Minor Periods

10:11 PM - 11:41 PM
10:15 AM - 11:45 AM

Action Rating: 2 out of 5

Monday, August 3, 2026

Weather Forecast

Sunny
69.6°F
38.5°F
57.4°F
48%
0 in
4%
0%
5.1 mph
5.1


Air Quality

AQI: 2 - Moderate
PM2.5: 25.5 μg/m3
PM10: 26.34 μg/m3
Carbon Monoxide: 181.88 μg/m3
Nitrogen Dioxide: 6.07 μg/m3
Sulphur Dioxide: 1.03 μg/m3
Ozone: 92.21 μg/m3

Astronomical

Sunrise: 6:14 AM
Sun Transit: 1:42 PM
Sunset: 9:10 PM
Daylight: 14 hrs 55 mins
Moonrise: 10:57 PM
Moon Transit: 5:12 AM
Moonset: 11:59 AM
Moon Phase: Waning Gibbous
Moon Illumination: 65.6%

Best Times for Fishing or Hunting

Major Periods

4:42 AM - 7:12 AM
1:46 PM - 4:16 PM

Minor Periods

10:27 PM - 11:57 PM
11:29 AM - 12:59 AM

Action Rating: 2 out of 5

Tuesday, August 4, 2026

Weather Forecast

Sunny
78.2°F
39.4°F
59.1°F
43%
0 in
1%
0%
4 mph
5.6


Air Quality

AQI: 2 - Moderate
PM2.5: 18.45 μg/m3
PM10: 18.88 μg/m3
Carbon Monoxide: 159.04 μg/m3
Nitrogen Dioxide: 7.25 μg/m3
Sulphur Dioxide: 1 μg/m3
Ozone: 85.92 μg/m3

Astronomical

Sunrise: 6:16 AM
Sun Transit: 1:42 PM
Sunset: 9:08 PM
Daylight: 14 hrs 52 mins
Moonrise: 11:15 PM
Moon Transit: 5:57 AM
Moonset: 1:16 PM
Moon Phase: Last Quarter
Moon Illumination: 54.6%

Best Times for Fishing or Hunting

Major Periods

5:27 AM - 7:57 AM
2:33 PM - 5:03 PM

Minor Periods

12:00 AM - 12:00 AM
12:46 AM - 2:16 PM

Action Rating: 2 out of 5

Wednesday, August 5, 2026

Weather Forecast

Sunny
83.4°F
44.2°F
63.1°F
38%
0 in
1%
0%
4 mph
5.8


Air Quality

AQI: 2 - Moderate
PM2.5: 23.13 μg/m3
PM10: 23.92 μg/m3
Carbon Monoxide: 227.06 μg/m3
Nitrogen Dioxide: 6.94 μg/m3
Sulphur Dioxide: 1.18 μg/m3
Ozone: 107.25 μg/m3

Astronomical

Sunrise: 6:17 AM
Sun Transit: 1:42 PM
Sunset: 9:07 PM
Daylight: 14 hrs 50 mins
Moonrise: 12:15 AM
Moon Transit: 6:47 AM
Moonset: 2:37 PM
Moon Phase: Last Quarter
Moon Illumination: 43.2%

Best Times for Fishing or Hunting

Major Periods

6:17 AM - 8:47 AM
3:24 PM - 5:54 PM

Minor Periods

2:07 PM - 3:37 PM
12:00 AM - 12:00 AM

Action Rating: 3 out of 5

Thursday, August 6, 2026

Weather Forecast

Sunny
91.5°F
47.2°F
68.5°F
33%
0 in
1%
0%
5.4 mph
0.8


Air Quality

AQI: 2 - Moderate
PM2.5: 28.69 μg/m3
PM10: 30.19 μg/m3
Carbon Monoxide: 266 μg/m3
Nitrogen Dioxide: 13.39 μg/m3
Sulphur Dioxide: 1 μg/m3
Ozone: 70.71 μg/m3

Astronomical

Sunrise: 6:18 AM
Sun Transit: 1:42 PM
Sunset: 9:05 PM
Daylight: 14 hrs 47 mins
Moonrise: 12:39 AM
Moon Transit: 7:41 AM
Moonset: 4:00 PM
Moon Phase: Last Quarter
Moon Illumination: 32.3%

Best Times for Fishing or Hunting

Major Periods

7:11 AM - 9:41 AM
4:19 PM - 6:49 PM

Minor Periods

3:30 PM - 5:00 PM
12:00 AM - 12:00 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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