Flathead Harbor Marina
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Around here
Around Flathead Harbor Marina
- Swan Lake CampgroundCampground · Good for boating18.4 mi
- Mission LookoutCabin rental18.6 mi
- Swan Guard StationCabin rental · Good for boating19.7 mi
- Ashley Lake South CampgroundCampground20.5 mi
- Anna Creek CabinCabin rental · Good for boating22.4 mi
- Doris Creek CampgroundCampground · Good for boating22.5 mi
Before you go
Data Source: Recreation.gov · Source: USGS GNIS · Public land: USGS PAD-US
Typical flow by month
1922 to 2025
The water at Flathead Harbor Marina typically runs highest in June, at a median 3,125 cfs, and lowest in February, at 432 cfs. The highest flow on record for any single day is 8,800 cfs, in 1974.
Show the numbers
| Month | Typical (cfs) | Usual range (cfs) |
|---|---|---|
| January | 449 | 381 to 556 |
| February | 432 | 364 to 565 |
| March | 517 | 413 to 703 |
| April | 1,365 | 956 to 1,935 |
| May | 2,590 | 1,870 to 3,320 |
| June | 3,125 | 2,380 to 4,080 |
| July | 1,480 | 970 to 1,990 |
| August | 634 | 492 to 801 |
| September | 476 | 399 to 583 |
| October | 500 | 393 to 590 |
| November | 540 | 437 to 678 |
| December | 477 | 409 to 583 |
Typical is the median of each month’s daily median values, and the usual range runs from the median 25th to the median 75th percentile, across about 103 years of record. Statistics published by the US Geological Survey for Swan River near Bigfork, MT (site 12370000). Conditions on any given day can fall well outside the usual range. Check the current reading before you go.
Current conditions
Today · Fri
87Go/ 100
FogHigh 55°F, low 35°FRain 5%Wind 8 kt, gusts 18
Streamflow
416 cfs
Below normal (19th)
Water level
2.26 ft
Air quality
53 Moderate
Columbia Falls monitor, 38 km
National Weather ServiceBelow flood stage
Flood stage 6.5 ft. NWS reads 2.26 ft here.
NWS forecast: 2.36 ft by Sun 11 PM, below flood stage.
Forecast from Open-Meteo global models (NOAA & ECMWF). Flood stages and forecasts: NOAA National Weather Service. Air quality: Montana DEQ via EPA AirNow. Preliminary data, not verified. See full conditions →
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