Flathead Lake

Lake County, MT

MAYBEConfidence · Medium
Best bite window
The highlighted window has passed. This read is still based on the latest cached weather; use the 7-Day forecast below for the next window.
Main reason
dry conditions across the window
Main risk
a front passing through

MAYBE on Flathead Lake — light winds and rising pressure after a passing system for this window. Watch a front passing through. Weather-only read (no on-water history calibrating this yet).

Next forecast window
MAYBE

Fri · Sep 11, 5 AM → 9 AM (America/Denver)

Full read

The latest cached fishing-weather read for Flathead Lake in Lake County, MT is MAYBE. Its highlighted window has passed, so use the 7-day forecast below for the next available window. The main factor in its favor was dry conditions across the window, while the main watch-out was a front passing through. Its cached forecast evidence included wind near 6 mph out of the southwest, gusting to 20 mph; surface pressure near 909 hPa on a rising trend; 0.00 inches of rain; and air temperature near 70 °F with overcast dominant. Confidence in this cached read is medium; it was generated September 10, 2026, 1:00 PM UTC, and reads refresh on a daily cadence. This is a weather-only read built from forecast weather; it does not yet use on-water reports, and confidence is capped until local water data or feedback exists.

UPDATED September 10, 2026, 1:00 PM UTCBUCKET 2026-09-10ENGINE 0.7.0

Conditions at a glance

Wind
6mph

SW · gust 20

Rain / Weather
0in

Overcast

Temp
70°F

21°C · hum 38%

Pressure
26.84inHg

Rising

7-Day Fishing Forecast

One read per day — the bite call, the window, the weather behind it

  1. Thu · Sep 10
    Window passed
    MAYBE
    A front passing through
    81° / 55°F
    6 mph · SWgust 23
    0.00 in
    ↓ -7.7 hPa
  2. Fri · Sep 11
    5 AM → 9 AM
    MAYBE
    A front passing through
    66° / 50°F
    5 mph · Sgust 26
    0.30 in
    ↑ +9.2 hPa
  3. Sat · Sep 12
    4 AM → 8 AM
    MAYBE
    A front passing through
    61° / 45°F
    7 mph · Ngust 19
    0.00 in
    ↓ -4.5 hPa
  4. Sun · Sep 13
    4 AM → 8 AM
    MAYBE
    A front passing through
    48° / 43°F
    12 mph · Ngust 19
    0.73 in
    ↑ +5.8 hPa
  5. Mon · Sep 14
    4 AM → 8 AM
    MAYBE
    A front passing through
    55° / 43°F
    6 mph · Sgust 7
    0.16 in
    ↑ +2.2 hPa
  6. Tue · Sep 15
    4 AM → 8 AM
    MAYBE
    A front passing through
    61° / 45°F
    5 mph · Ngust 9
    0.00 in
    ↑ +4.0 hPa
  7. Wed · Sep 16
    4 AM → 8 AM
    MAYBE
    A front passing through
    63° / 45°F
    4 mph · Ngust 7
    0.00 in
    ↓ -0.7 hPa

Last 3 days

Recent context — what just happened

Pressure
Rising
+4.1 hPa over 72h
Rain
Light rain
0.36 in totallast 72h
Wind
Calm wind
7 mph · gust 19 · S
Temperature
Warmer
+3.1°F over 72h72–50°F range

Weather-only read. Confidence is capped until local water data or feedback exists.

About Flathead Lake

Surface area
123,000 acres
Max depth
370.7 ft
Elevation
2,893 ft
Water clarity
Clear
Managing agency
Montana Fish, Wildlife & Parks (north half) and Confederated Salish and Kootenai Tribes (south half), co-managed
Dam
Seliš Ksanka Qlispe Dam (Flathead River)

Primary species: Lake trout, Yellow perch, Northern pike, Largemouth bass, Smallmouth bass, Black crappie, Rainbow trout, Brook trout, Cutthroat trout.

Nearby waters

Weather data by Open-Meteo — CC BY 4.0. Fishing Weather derives the fishing read.