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Flathead Lake Fishing Report

Updated Fri, Oct 23, 2026 from live gauge and weather data

The West's largest natural lake: lake trout depths and postcard water.

2/5
Slow. The wind owns today.27 mph gusts make boat control the real battle.
Lake level
2891.78 ft
Air / High
40 / 46 F
Wind
NNW 25 mph

Sources: USGS gauge 12371550, Open-Meteo, solunar calculated for these coordinates.

Satellite view
Friday
23
October 2026

Today's Fishing Report

Generated this morning from live readings: gauge, weather model, sun and moon. A fresh report is published here every morning.

2/5Slow. The wind owns today.27 mph gusts make boat control the real battle.

Flathead Lake feels the season turning: shorter days, grouping fish. The gauge reads 2891.78 ft, easing 0.27 over the week. Today brings cloud cover, wind NNW around 25 mph, rising pressure near 1015 hPa and a high of 46. Water sits around 55 F for the season (estimated). With the waxing gibbous, the solunar majors run 10:14 AM-12:14 PM and 10:45 PM-12:45 AM: the windows to build the day around.

The plan, species by species

WalleyeGood

Spring: post-spawn fish scatter and can be slow for a couple of weeks. Fall: one of the best windows, with minnows on jigs and three-way rigs as the water cools toward ice-up.

Smallmouth bassGood

Spring pre-spawn and fall: Iowa DNR notes the larger bass come up to shallow structure, where a shallow-running minnow bait or a spinnerbait just under the surface works.

Northern pikeGood

The best band for pike: right after ice-out they move into flooded vegetated shallows to spawn, and they feed actively again as the water cools in fall.

Yellow perchGood

Spring and fall: perch hold shallower and, by Michigan DNR's account, feed through the day, so shoreline weed edges, flats and the shallows near spawning areas are worth searching.

Tomorrow: Similar at 44 F. The solunar majors shift about 50 minutes later.Next report: Sat, Oct 24, 6:30 AMHow this report is made β†’

Before you go

Montana requires a fishing licence from age 12, from $31.00 for residents. What a Montana licence costs and where to buy it β†’

Chasing walleye here? Check the size and bag limits with FWP before you keep anything. The season dates for Montana, read off the agency, are on the Montana seasons page.

Water and weather

Live readings from Flathead Lake at Polson MT.

Water level, last 30 days

USGS gauge 12371550.

2891.962892.382892.792891.78 ft09/2310/0310/1310/23

Right now

Latest readings

Air temp40 F
High / Low46 / 40 F
WindNNW 25-27 mph
Pressure1015.1 hPa, rising
Sky / Rain100% cloud, 72%
Sunrise / Sunset08:07 / 18:33
MoonWaxing Gibbous, 91%
Water temp (seasonal)~55 F est.

Bite planner

Hour-by-hour bite forecast for today. Tap a bar to see why.

5 AM8 AM11 AM2 PM5 PM8 PMsunrisesunset

Which day to fish Flathead Lake this week

The best day on Flathead Lake this week looks like Saturday Oct 24, at 3 out of 5, against 2 today.

Best day this week: Saturday, Oct 24 β€” fair at 3/5, rising pressure behind a front, typically the slowest.

Today, Oct 23 β€” Tough

27 mph gusts make boat control the real battle.

Solunar majors
10:14 AM-12:14 PM and 10:45 PM-12:45 AM
Minor period
4:40 AM-5:40 AM
Sun
08:07 to 18:33
Moon
Waxing Gibbous, 91% lit
Sky and wind
Showers, 27 mph
Rain chance
72%

Forecast-based scores, less reliable further out: how the score is built.

Species guide

The species that matter on Flathead Lake: seasons, structure and how to fish each one. Today's ratings live in the report above.

Walleye illustration

Walleye

Best: spring and late fall, around dawn, dusk and night

A cool-water perch of large lakes, reservoirs and rivers whose reflective eyes are built for low light, so it feeds most at night and in murky water. The Missouri Department of Conservation ranks it among the continent's most important freshwater game fish. Spring: post-spawn fish scatter and can be slow for a couple of weeks. Fall: one of the best windows, with minnows on jigs and three-way rigs as the water cools toward ice-up.

Smallmouth bass illustration

Smallmouth bass

Best: spring and fall, when bigger fish come shallow

A bronze-brown black bass of clear, cool streams and rocky lakes, with dark vertical bars instead of a side stripe. Michigan DNR says its southeastern coast, from Port Huron to Lake Erie, is known nationally for both the size and the number of its smallmouth. Spring pre-spawn and fall: Iowa DNR notes the larger bass come up to shallow structure, where a shallow-running minnow bait or a spinnerbait just under the surface works.

Northern pike illustration

Northern pike

Best: cool water, from ice-out through spring, in fall and under the ice

A long, duck-billed predator of weedy lakes, slow rivers and backwaters that ambushes fish from vegetation. Wisconsin DNR points out that, unlike most of the state's common game fish, pike do their best feeding in cool water. The best band for pike: right after ice-out they move into flooded vegetated shallows to spawn, and they feed actively again as the water cools in fall.

Yellow perch illustration

Yellow perch

Caught all year, including under the ice through winter

Yellow perch are schooling panfish of the Great Lakes and northern lakes, and Michigan DNR calls them the game fish most often caught in that state. Spring and fall: perch hold shallower and, by Michigan DNR's account, feed through the day, so shoreline weed edges, flats and the shallows near spawning areas are worth searching.

When to come: the Flathead Lake calendar

Activity by species and month, and how the water warms through the year. Tap any cell.

Species activity by month

1 = slow, 5 = peak. Current month highlighted.

J
F
M
A
M
J
J
A
S
O
N
D
Walleye
Smallmouth bass
Northern pike
Yellow perch
SlowPeak

Water temperature through the year

Typical surface temperature for this water type; today is around 55 F (estimated, not a reading).

304050607080JanMarMayJulSepNovOct, ~55 F now

Angler reports

Real reports from real anglers, reviewed before publishing. The water log below tracks each day automatically.

No angler reports yet this weekBe the first: your report helps every angler who checks Flathead Lake today, and we feature the best catch of the week.

Water log, last days

Auto-logged from live data
Thu, Oct 22

3/5 Fair. Fish the windows. A steady pattern: dawn and dusk carry the day. Walleye led the card at good. High of 47 F, wind to 14 mph.

Wed, Oct 21

3/5 Fair. Fish the windows. A steady pattern: dawn and dusk carry the day. Walleye led the card at good. High of 47 F, wind to 16 mph.

Tue, Oct 20

3/5 Fair. Fish the windows. A steady pattern: dawn and dusk carry the day. Walleye led the card at good. High of 45 F, wind to 13 mph.

Where roughly, what depth, what bait. Skip anything you want to keep secret.
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Before you go

License

Montana requires a valid fishing license for adults. Buy online from the state agency; one-day options exist for visitors.

Regulations

Bull trout: mandatory release, ID required knowledge. Tribal permit needed south half: check CSKT + MT FWP.

Access

Somers, Big Arm SP, Polson, Woods Bay ramps.

About this water

125,500 acres, natural, Flathead/Lake counties, MT. Largest natural freshwater lake in the West (lower 48).

Fishing Flathead Lake: the full guide

Big, clear, cold

Flathead is the largest natural freshwater lake west of the Mississippi: 28 miles of glacial clarity where lake trout (dense and harvest-encouraged) dominate the depths, whitefish school by the thousand, and bull trout: protected: patrol the edges. Trolling and vertical jigging rule; the Mack Days derbies pay anglers to thin the lakers.

Lake trout depths

Flathead's lakers dominate the food web: jigged over 150-250 ft humps year-round, with Mack Days derbies (spring and fall) paying anglers to harvest them by the thousand. The average runs 4-8 lb with 20-plus-pounders weekly: bring heavy jigs, electric reels optional but popular.

The clarity game

Gin-clear water sets the rules: fluorocarbon everything, long casts for the bull trout you must release (know the ID), and whitefish schools that save slow days. Summer evenings, perch and cutthroat work the drop-offs of Big Arm and Polson Bay: light-line finesse in postcard scenery.

Common questions

What is Mack Days?

Twice-yearly harvest derbies paying cash for lake trout to rebalance the native fishery: thousands of entries, tagged-fish jackpots. Visitors welcome: it is Flathead's biggest fishing event.

Island shorelines and the perch inheritance

Flathead's Wild Horse Island shorelines drop fast into laker water, making the island circuit the lake's classic troll. Meanwhile the humble yellow perch (the lake's old staple) still schools off Polson's flats: winter jigging fills buckets like the old days. Spring bull-trout bycatch demands ID discipline: know the difference before you lift a net.

Is fishing good at Flathead Lake right now?

Check the daily report at the top of this page: it is regenerated every morning from live data. Today's read: Slow. The wind owns today. 27 mph gusts make boat control the real battle.

Nearby waters

Flathead River33 miKootenai River66 miClark Fork River (Missoula)70 miBlackfoot River72 miBitterroot River73 miNoxon Rapids Reservoir73 mi

Where this page's numbers come from

River and reservoir readings
USGS 12371550 β€” Flathead Lake at Polson MT
Read from the USGS Water Data API (api.waterdata.usgs.gov). Latest value timestamped 2026-10-23 at 20:30 UTC.
Weather and pressure
Open-Meteo forecast model
Queried at 47.8869, -114.1316 in this water's own timezone. A model, not an observation.
Moon and solunar windows
Calculated on this site
Astronomical calculation from these coordinates and the date, not a third-party feed. How much weight it deserves.
The written guide on this page
Pablo Ruiz Quintero
How this page was made. The daily report is computed by our scoring engine from live readings; nobody types it. The written guide was drafted with AI assistance. Unlike our newer pages, it does not yet list the official pages its facts were checked against: that audit is under way, and anything it cannot verify will be taken out. Pablo Ruiz Quintero sets every guideline, the data-verification system and the minimum standards a page must meet to be published, reviews page structure and approves what goes live; the responsibility is his, and the AI carries out the work. We work this way because it is how one person can keep every page current with named sources. Errors are published in the verification log; the full policy is in the editorial policy.

Readings refresh on a 30-minute window. The full method, with every figure and its source, is on how our reports are made. Something wrong here? Tell us and it goes in the log with the date.