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Forecast
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© 2026·AI-powered bite forecast
0.1.0+2161 · b4069346

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United States / Montana / White River

Bite forecast: White River

  • length 22 mi
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Best fishing days for the next week

  1. WednesdaySeptember 2weather-based forecast
    68/100high activity

    Cloudy: 43–54 °F

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Nearby rivers

  • South Fork Flathead River8 mi

Nearby water bodies

  • LakeMy Lake5 mi
  • LakeDiamond Lake5 mi
  • LakeMud Lake7 mi
  • LakeChristopher Lake7 mi

White River (Montana) — one of the area's fishing spots. About 35 km long. A smart bite calendar — moon phase, atmospheric pressure, and weather combined into an hourly fish-activity forecast for the coming days.

SaturdaySeptember 5weather-based forecast
56/100medium activity

Cloudy: 32–68 °F

  • SundaySeptember 6weather-based forecast
    56/100medium activity

    Clear: 41–70 °F

  • Bite calendar

    Aug 31 – Sep 6
    Mon
    Tue
    Wed
    Thu
    Fri
    Sat
    Sun
    Bite activity:highmediumlowslow
    Based on:weatherseasonal
    What is a bite calendar?
    Brown troutCarpLargemouth bassBluegillBrook troutChannel catfishCutthroat troutPikeWalleyeWhitefishYellow perchRainbow troutSmallmouth bassBlack crappieLake troutBurbot

    Black crappie

    4/10 · Weak

    Hourly activity

    0:006:0012:0018:0023:00
    Bite activity:highmediumlow

    The bite is moderate — fish feed in short bursts. Pressure is rising — activity tends to be more subdued.

    Peak bite hours

    Best time — 07:00–09:00 (dawn bite) and 20:00–22:00 (dusk bite).

    Tactics

    Work the cover — snags, weed edges, hole entrances; retrieve the lure with pauses.

    Lures

    In clear water, natural colors work best: small jig or minnow bait.

    Gear

    Bring a warm jacket — it's noticeably colder on the water than on shore.

    Summary

    An average day — best chances during peak windows.

    How this forecast is calculated

    Why this forecast

    The computed water temperature is around 53 °F — colder than the 57–75 °F comfort range for Black crappie: the fish conserves energy and takes more cautiously.

    Computed water temperature by month; the green band is the 57–75 °F comfort rangecomfort 57–75 °F53 °F
    JFMAMJJASOND

    Black crappie works the twilight: the peaks are pinned to sunrise and sunset — their times are in the sun-and-moon card above.

    The day: daylight hours and when Black crappie feeds0:0012:0024:00

    Pressure is flat: it moves no more than 0.00 inHg over the day, so the weather isn't shifting today's bite.

    Pressure through the day, 0.00 inHg change
    00:00 · 29.8823:00 · 29.88 inHg

    One more input — the moon's feeding windows: within their hours the score sits higher than across the rest of the day. The window times are in the “Solunar feeding periods” card below.

    Feeding windows on the day scale0:0012:0024:00

    September is an average month for Black crappie here.

    JFMAMJJASOND

    These are the same values the bite curve above was computed from. How the forecast works

    6 SepSunday, September 6
    +66°

    Clear · feels like +62°

    Low / high
    +40°…+70°
    Precipitation
    0.00 in
    Wind
    4 mph SSE
    Cloud cover
    6%
    Humidity
    24%
    Pressure
    29.81 inHg
    00:00+45°—5 mphnortheast wind, 5 mph62%0%
    01:00+45°—5 mphnortheast wind, 5 mph60%5%
    02:00+44°—5 mphnortheast wind, 5 mph60%6%
    03:00+43°—3 mphnortheast wind, 3 mph61%7%
    04:00+43°—4 mphnortheast wind, 4 mph61%6%
    05:00+42°—4 mphnortheast wind, 4 mph62%6%
    06:00+41°—3 mphnortheast wind, 3 mph64%91%
    07:00+40°—3 mphnortheast wind, 3 mph66%37%
    08:00+44°—3 mphnortheast wind, 3 mph59%11%
    09:00+52°—3 mpheast wind, 3 mph45%6%
    10:00+58°—3 mphsoutheast wind, 3 mph35%5%
    11:00+63°—3 mphsoutheast wind, 3 mph28%5%
    12:00+66°—4 mphsouth wind, 4 mph24%6%
    13:00+69°—5 mphsouth wind, 5 mph20%32%
    14:00+70°—6 mphsouth wind, 6 mph17%67%
    15:00+70°—5 mphsouth wind, 5 mph17%94%
    16:00+69°—4 mphsouth wind, 4 mph19%100%
    17:00+67°—1 mphwest wind, 1 mph23%100%
    18:00+64°—2 mphnorth wind, 2 mph28%100%
    19:00+60°—4 mphnorth wind, 4 mph34%100%
    20:00+55°—4 mphnorth wind, 4 mph42%100%
    21:00+51°—5 mphnorth wind, 5 mph48%97%
    22:00+49°—5 mphnorth wind, 5 mph51%84%
    23:00+47°—5 mphnorth wind, 5 mph53%67%
    +70°+55°+40°
    Weather throughout the day
    0:006:0012:0018:0023:00

    Sun and moon

    Sunday, September 6
    The day: daylight and the hours the moon is above the horizon. Local time0:0012:0024:00
    DaylightMoon above the horizon
    Sunrise
    07:01
    Sunset
    20:02
    Day length
    13 h 1 min
    Sunshine hours
    12 h 20 min
    UV index
    5
    moderate
    Moon
    Waning crescent
    Moonrise
    00:56
    Moonset
    18:01

    The day is 3 min shorter than yesterday.

    Sunshine hours count direct sun only — cloud cover cuts it, so it is shorter than daylight.

    Solunar feeding periods

    +11% in the windowSunday, September 6
    Feeding windows on the day scale, local time0:0012:0024:00
    Major periodsMinor periods
    • Minor00:26–01:26Moonrise
    • Major08:35–10:35Moon overhead
    • Minor17:31–18:31Moonset
    • Major21:05–23:05Moon underfoot

    The windows are set by the moon's transit and rise, and the forecast above already accounts for them: within these hours the bite score sits higher than across the rest of the day, while the day's overall level still comes from the catch-calibrated model.

    What are solunar periods?