Fishing
Report.
Live conditions on Flathead Lake and the Flathead River, pulled from USGS gauges and weather stations. The verdict — PRIME, GOOD, FAIR, or POOR — is computed from flow, water temperature, wind, and barometric pressure. The narrative below comes from our guide team.
Columbia Falls to Flathead Lake
Flathead River
USGS reading 53 min ago
What's working
From our guide team — Apr 29
The Flathead is fishing well right now — clear water, steady flows, and willing trout. We've been doing best on hopper-dropper rigs through midday with a size 14 chubby up top and a small pheasant tail or zebra midge below. Evenings have produced rising fish to PMDs in the slower seams. Book a guided float to put yourself on the best water.
Flow
17,300 ↓
112% of normal
Water Temp
44°F ↑
cold
Gauge Height
8.24 ft ↓
Air · Wind
60°F
1 mph SW
What's happening
Water 44°F — cold, fish lethargic.
What to do
Slow nymphing through deeper holding water. Small midges and worms below an indicator.
5-Day Forecast
Today
61°
lo 31°
Thu
67°
lo 43°
Fri
68°
lo 45°
Sat
70°
lo 46°
Sun
72°
lo 46°
Bigfork to Polson
Flathead Lake
USGS reading 1 hr ago
What's working
From our guide team — Apr 29
Lake trout are holding mid-column over structure — the spring bite is on. We're putting clients on fish with vertical jigging in 60–120 ft, white tubes and Gulp grubs working consistently. Mornings have been calm; afternoons can blow up fast, so we like to be on the water early. Whitefish are still around for those who want to mix it up.
Wind
4 mph
W
Air Temp
58°F
Lake Level
2890.44 ft →
elevation
Pressure
—
What's happening
Calm enough to run anywhere on the lake — pick your structure and start working it.
What to do
Spring transition — cold-water species shallow, scout shorelines and inlet mouths.
5-Day Forecast
Today
59°
lo 38°
Thu
65°
lo 48°
Fri
68°
lo 53°
Sat
70°
lo 46°
Sun
73°
lo 46°
Flow as % of median
How today's discharge compares to the long-term average for this date. 90–125% is the wadeable green zone. Above 150% usually means runoff or storm influence; below 75% means low and clear.
Water temperature
Trout activity peaks between 50 and 62°F. Below 45°F they get lethargic; above 68°F they're heat-stressed and we transition to other species or cooler hours.
Wind on Flathead Lake
Flathead is the largest natural lake west of the Mississippi — wind builds chop fast. Under 12 mph is comfortable; over 18 mph is rough; over 25 mph we stay off the main lake.
Pressure trend
Falling barometric pressure ahead of weather often triggers a strong bite window. Stable or rising pressure post-front tends to slow fish for a few hours.
Live data sourced from the USGS Water Services API and Open-Meteo. Editorial guidance from the Fish On Charters Montana guide team, based in Lakeside.
Common Questions
What's the Flathead River fishing like right now?
Live conditions are at the top of this page — current flow, water temperature, and a guide-team verdict. We update the readings every 15 minutes from USGS gauges and refresh the editorial notes weekly based on what our guides are seeing on the water.
Is the Flathead Lake fishing good today?
Wind is the biggest factor on Flathead Lake — it's a large, exposed body of water. Check the conditions block above for today's wind and a fishability rating. Lake trout (mackinaw), whitefish, and kokanee are the primary targets depending on season.
When is the best time to fish the Flathead River?
Late spring through early fall is the prime window. Runoff typically subsides by mid-June, and clear-water conditions hold through October. The river fishes best in the 50–62°F water-temperature range — when surface temps push above 68°F, we recommend pausing trout fishing under Montana hoot-owl ethics.
What flow is good for fishing the Flathead?
We look for 90–125% of the long-term seasonal median — that's the green zone for wadeable, fishable, clear water. Below 75% means low and clear (technical fishing); above 150% usually means runoff or storm influence and limited visibility. Today's flow vs. median is shown in the conditions block above.
How often is this report updated?
Live data — flow, water temperature, weather — refreshes automatically every 15 minutes from USGS and Open-Meteo public APIs. The 'What's Working' notes from our guide team update weekly.
Ready when you are