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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 / Alaska / Alsek River

Bite forecast: Alsek River

  • length 43 mi
Loading map…

Best fishing days for the next week

  1. MondaySeptember 7weather-based forecast
    59/100medium activity

    Showers: 45–50 °F

Alsek River (Alaska) — one of the area's fishing spots. About 69 km long. Here you'll find a bite prediction — when fish are active and which hours give the best chances, adjusted for weather and pressure.

Nearby rivers

  • Doame River6 mi
  • Emile Creek8 mi
  • Split Creek9 mi

Nearby water bodies

  • LakeAlsek Lake4 mi
  • LakeLower Doane Lake7 mi
SundaySeptember 6weather-based forecast
58/100medium activity

Cloudy: 41–57 °F

  • TuesdaySeptember 8weather-based forecast
    58/100medium activity

    Drizzle: 50–59 °F

  • Bite calendar

    7–Sep 13
    Mon
    Tue
    Wed
    Thu
    Fri
    Sat
    Sun
    Bite activity:highmediumlowslow
    Based on:weatherseasonal
    What is a bite calendar?

    In the fish list, this icon marks species recorded here by GBIF. Unmarked species may still occur in the waterbody.

    Coho salmonBrook troutCutthroat troutGraylingNelmaPikeSteelheadWhitefishChinook salmonRainbow troutLake troutBurbot

    Brook trout

    7/10 · Good

    Hourly activity

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

    The bite is strong — fish are active. Pressure is dropping — this usually boosts the bite.

    Peak bite hours

    Best time — 08:00–09:00 (dawn bite) and 21:00–23:00 (dusk bite).

    Tactics

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

    Lures

    The water's turning murky — go with bright, noisy lures: spinner or fly.

    Gear

    Pack transitional-season clothing — mornings and evenings are chilly. Rain is expected — don't forget a rain jacket or a waterproof shell.

    Summary

    Worth going — it's a productive day.

    How this forecast is calculated

    Why this forecast

    The computed water temperature is around 52 °F — inside the 45–61 °F comfort range for Brook trout, so baseline activity is high.

    Computed water temperature by month; the green band is the 45–61 °F comfort rangecomfort 45–61 °F52 °F
    JFMAMJJASOND

    Brook trout 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 Brook trout feeds0:0012:0024:00

    Pressure is flat: it moves no more than 0.03 inHg over the day, so the weather isn't shifting today's bite.

    Pressure through the day, 0.03 inHg change
    00:00 · 29.7023:00 · 29.72 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 peak season for Brook trout here.

    JFMAMJJASOND

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

    8 SepTuesday, September 8
    +53°

    Drizzle · feels like +49°

    Low / high
    +49°…+58°
    Precipitation
    0.00 in
    Wind
    10 mph SSW
    Cloud cover
    85%
    Humidity
    86%
    Pressure
    29.61 inHg
    00:00+51°0.05 in13 mphsoutheast wind, 13 mph96%100%
    01:00+51°0.05 in13 mphsoutheast wind, 13 mph97%100%
    02:00+51°0.05 in13 mphsoutheast wind, 13 mph97%100%
    03:00+51°0.05 in12 mphsoutheast wind, 12 mph97%100%
    04:00+51°0.05 in12 mphsoutheast wind, 12 mph98%100%
    05:00+51°0.03 in11 mphsoutheast wind, 11 mph98%100%
    06:00+51°0.03 in10 mphsoutheast wind, 10 mph100%100%
    07:00+50°0.03 in9 mphsoutheast wind, 9 mph100%100%
    08:00+50°0.03 in9 mphsouth wind, 9 mph100%100%
    09:00+50°0.03 in9 mphsouth wind, 9 mph100%100%
    10:00+51°0.03 in9 mphsouth wind, 9 mph99%100%
    11:00+52°0.00 in9 mphsouth wind, 9 mph94%94%
    12:00+53°0.00 in10 mphsouthwest wind, 10 mph86%85%
    13:00+55°0.00 in10 mphsouthwest wind, 10 mph78%74%
    14:00+57°0.00 in10 mphsouthwest wind, 10 mph71%64%
    15:00+58°0.00 in10 mphsouthwest wind, 10 mph66%54%
    16:00+58°0.00 in10 mphsouthwest wind, 10 mph64%48%
    17:00+58°—9 mphsouthwest wind, 9 mph65%44%
    18:00+56°—8 mphsouthwest wind, 8 mph68%42%
    19:00+55°—7 mphsouthwest wind, 7 mph74%40%
    20:00+53°—6 mphsouth wind, 6 mph80%41%
    21:00+51°—6 mphsouth wind, 6 mph87%43%
    22:00+50°—5 mphsouth wind, 5 mph91%46%
    23:00+49°—5 mphsouth wind, 5 mph94%52%
    +58°+54°+49°
    Weather throughout the day
    0:006:0012:0018:0023:00

    Sun and moon

    Tuesday, September 8
    The day: daylight and the hours the moon is above the horizon. Local time0:0012:0024:00
    DaylightMoon above the horizon
    Sunrise
    07:41
    Sunset
    21:11
    Day length
    13 h 30 min
    Sunshine hours
    12 h 54 min
    UV index
    2
    low
    Moon
    Waning crescent
    Moonrise
    02:34
    Moonset
    19:20

    The day is 5 min shorter than yesterday.

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

    Solunar feeding periods

    +14% in the windowTuesday, September 8
    Feeding windows on the day scale, local time0:0012:0024:00
    Major periodsMinor periods
    • Minor02:04–03:04Moonrise
    • Major10:14–12:14Moon overhead
    • Minor18:50–19:50Moonset
    • Major22:40–00:00Moon 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?
    Loading map…

    Measured river conditions are available for Alsek River: current gauge height, streamflow, and water temperature when reported by the source.

    Water

    Gauge height
    15.69 ft
    Streamflow
    87,500 ft³/s
    Water temp · measured
    54 °F
    In the model
    52 °F

    USGS gauge ALSEK R AT DRY BAY NR YAKUTAT AK, 5 mi away · measured 2026-09-02 06:45 · data source · provisional data, subject to revision