Porcupine Lake

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

Next forecast window
MAYBE

Wed · Oct 28, 4 AM → 8 AM (America/Denver)

Full read

The latest cached fishing-weather read for Porcupine Lake in Granite 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 4 mph out of the southeast, gusting to 5 mph; surface pressure near 744 hPa on an unstable trend; 0.00 inches of rain; and air temperature near 28 °F with overcast dominant. Confidence in this cached read is medium; it was generated October 26, 2026, 9:25 AM 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 October 26, 2026, 9:25 AM UTCBUCKET 2026-10-26ENGINE 0.7.0

Conditions at a glance

Wind
4mph

SE · gust 5

Rain / Weather
0in

Overcast

Temp
28°F

-2°C · hum 44%

Pressure
21.97inHg

Unstable

7-Day Fishing Forecast

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

  1. Mon · Oct 26
    Window passed
    MAYBE
    A front passing through
    37° / 25°F
    4 mph · SEgust 35
    0.03 in
    ↓ -3.2 hPa
  2. Tue · Oct 27
    4 AM → 8 AM
    SKIP
    Extreme gusts
    25° / 19°F
    21 mph · Wgust 41
    0.14 in
    ↓ +0.9 hPa
  3. Wed · Oct 28
    4 AM → 8 AM
    MAYBE
    A front passing through
    28° / 16°F
    5 mph · SWgust 14
    0.12 in
    ↑ +4.4 hPa
  4. Thu · Oct 29
    10 AM → 2 PM
    MAYBE
    A front passing through
    34° / 16°F
    4 mph · SWgust 12
    0.00 in
    ↓ -0.4 hPa
  5. Fri · Oct 30
    4 AM → 8 AM
    MAYBE
    A front passing through
    36° / 23°F
    5 mph · SEgust 9
    0.04 in
    ↓ -5.4 hPa
  6. Sat · Oct 31
    4 AM → 8 AM
    MAYBE
    A front passing through
    34° / 23°F
    3 mph · Wgust 10
    0.07 in
    ↓ +1.9 hPa
  7. Sun · Nov 1
    4 AM → 8 AM
    MAYBE
    A front passing through
    30° / 18°F
    5 mph · SWgust 16
    0.32 in
    ↑ +5.3 hPa

Last 3 days

Recent context — what just happened

Pressure
Unstable
+14.2 hPa over 72h
Rain
Wet stretch
1.13 in totallast 72h
Wind
Gusty
7 mph · gust 30 · S
Temperature
Cooler
-11.2°F over 72h37–14°F range

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

Nearby waters

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