Nelson Reservoir

Madison 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 Nelson Reservoir — 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

Tue · Oct 27, 4 AM → 8 AM (America/Denver)

Full read

The latest cached fishing-weather read for Nelson Reservoir in Madison 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 3 mph out of the southeast, gusting to 6 mph; surface pressure near 853 hPa on an unstable trend; 0.00 inches of rain; and air temperature near 32 °F with fog dominant. Confidence in this cached read is medium; it was generated October 26, 2026, 9:38 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, 9:38 AM UTCBUCKET 2026-10-26ENGINE 0.7.0

Conditions at a glance

Wind
3mph

SE · gust 6

Rain / Weather
0in

Fog

Temp
32°F

0°C · hum 96%

Pressure
25.19inHg

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
    54° / 32°F
    3 mph · SEgust 32
    0.10 in
    ↓ -5.5 hPa
  2. Tue · Oct 27
    4 AM → 8 AM
    MAYBE
    A front passing through
    46° / 32°F
    11 mph · Sgust 30
    0.00 in
    ↓ +0.5 hPa
  3. Wed · Oct 28
    7 PM → 11 PM
    MAYBE
    A front passing through
    48° / 32°F
    7 mph · Sgust 22
    0.00 in
    → +3.9 hPa
  4. Thu · Oct 29
    4 AM → 8 AM
    MAYBE
    A front passing through
    50° / 36°F
    6 mph · Sgust 9
    0.00 in
    ↓ -1.0 hPa
  5. Fri · Oct 30
    4 AM → 8 AM
    MAYBE
    A front passing through
    52° / 36°F
    6 mph · NEgust 27
    0.00 in
    ↓ -6.8 hPa
  6. Sat · Oct 31
    4 AM → 8 AM
    MAYBE
    A front passing through
    50° / 39°F
    7 mph · Sgust 11
    0.01 in
    ↓ +4.0 hPa
  7. Sun · Nov 1
    4 AM → 8 AM
    MAYBE
    A front passing through
    48° / 36°F
    6 mph · Sgust 14
    0.05 in
    ↓ +3.2 hPa

Last 3 days

Recent context — what just happened

Pressure
Unstable
+16.5 hPa over 72h
Rain
Wet stretch
1.18 in totallast 72h
Wind
Gusty
11 mph · gust 41 · SE
Temperature
Cooler
-22.9°F over 72h54–25°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.