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© 2026·AI-powered bite forecast
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United States / New Mexico / San Juan River

Bite forecast: San Juan River

  • length 138 mi
Loading map…

Best fishing days for the next week

  1. ThursdaySeptember 10weather-based forecast
    71/100high activity

    Drizzle: 50–61 °F

San Juan River (New Mexico) — a spot well known among anglers. About 221 km long. Close by — Shiprock and Farmington. A smart bite calendar — moon phase, atmospheric pressure, and weather combined into an hourly fish-activity forecast for the coming days.

TuesdaySeptember 8weather-based forecast
69/100high activity

Clear: 54–70 °F

  • WednesdaySeptember 9weather-based forecast
    69/100high activity

    Clear: 50–66 °F

  • Nearby towns

    • Shiprock0.4 mi
    • Farmington1 mi

    Nearby rivers

    • Wildflower Arroyo3 mi
    • Homestead Wash3 mi
    • Hargis Arroyo5 mi
    • Horn Canyon Wash6 mi
    • Valle Verde Wash6 mi
    • Rabbit Arroyo7 mi
    • Blancett Arroyo8 mi
    • Charlie Wash8 mi
    • Flora Vista Arroyo8 mi
    • Cook Arroyo9 mi

    Nearby water bodies

    • ReservoirCity Reservoir6 mi
    • LakeLake Luther6 mi
    Loading map…

    Catches

    Recorded 2 catches here. Most commonly caught: Largemouth bass, Rainbow trout. Peak season: July–December.

    • Rainbow trout — San Juan River, Jul 30, 2013, 3:21 PM
      4
      Rainbow trout
      San Juan River
      82 °F7 mph
      Jul 30, 2013, 3:21 PM
    • Largemouth bass
      San Juan River
      32 °F16 mph
      Dec 22, 2017

    Bite calendar

    Friday, September 4

    Aug 31 – Sep 6
    Mon
    Tue
    Wed
    Thu
    Fri
    Sat
    Sun
    Bite activity:highmediumlowslow
    Based on:weatherseasonal
    What is a bite calendar?
    Brook troutCarpCutthroat troutLargemouth bassSmallmouth bassWalleyeWhite bassBluegillSpotted bassStriped bassBlue catfishBrown troutChannel catfishFlathead catfishRainbow troutWhite crappieBlack crappie

    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. Weather is steady, with no sharp swings — fish behave predictably.

    Peak bite hours

    Best time — 06:00–08:00 (dawn bite) and 19:00–21:00 (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: small jig or minnow bait.

    Gear

    No special gear needed — seasonal clothing will do. Rain is expected — don't forget a rain jacket or a waterproof shell.

    Summary

    An average day — best chances during peak windows.

    How this forecast is calculated

    Why this forecast

    The computed water temperature is around 59 °F — inside the 57–75 °F comfort range for Black crappie, so baseline activity is high.

    Computed water temperature by month; the green band is the 57–75 °F comfort rangecomfort 57–75 °F59 °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 0.03 inHg over the day, so the weather isn't shifting today's bite.

    Pressure through the day, 0.03 inHg change
    00:00 · 29.8023:00 · 29.81 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 active season for Black crappie here.

    JFMAMJJASOND

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

    4 SepFriday, September 4
    +62°

    Cloudy · feels like +55°

    Low / high
    +54°…+68°
    Precipitation
    0.00 in
    Wind
    15 mph WSW
    Cloud cover
    100%
    Humidity
    57%
    Pressure
    29.83 inHg
    00:00+57°—9 mphwest wind, 9 mph69%100%
    01:00+55°0.02 in13 mphsouthwest wind, 13 mph73%100%
    02:00+55°—10 mphsouthwest wind, 10 mph69%80%
    03:00+55°—10 mphsouthwest wind, 10 mph67%100%
    04:00+55°—11 mphsouthwest wind, 11 mph61%81%
    05:00+55°—11 mphsouthwest wind, 11 mph65%99%
    06:00+54°—16 mphsouthwest wind, 16 mph77%92%
    07:00+54°—16 mphsouthwest wind, 16 mph77%100%
    08:00+56°—12 mphwest wind, 12 mph59%100%
    09:00+56°—15 mphsouthwest wind, 15 mph63%100%
    10:00+57°—19 mphsouthwest wind, 19 mph67%100%
    11:00+61°—18 mphsouthwest wind, 18 mph59%100%
    12:00+62°—15 mphsouthwest wind, 15 mph57%100%
    13:00+68°—10 mphsouthwest wind, 10 mph42%100%
    14:00+67°—11 mphsouthwest wind, 11 mph47%100%
    15:00+67°—12 mphwest wind, 12 mph52%100%
    16:00+67°—10 mphwest wind, 10 mph48%100%
    17:00+67°—9 mphwest wind, 9 mph46%100%
    18:00+66°—8 mphsouthwest wind, 8 mph48%100%
    19:00+63°—4 mphwest wind, 4 mph54%94%
    20:00+60°—2 mphwest wind, 2 mph65%100%
    21:00+58°—1 mphnortheast wind, 1 mph65%100%
    22:00+56°—3 mphnorthwest wind, 3 mph69%100%
    23:00+57°—8 mphsouthwest wind, 8 mph61%35%
    +68°+61°+54°
    Weather throughout the day
    0:006:0012:0018:0023:00

    Sun and moon

    Friday, September 4
    The day: daylight and the hours the moon is above the horizon. Local time0:0012:0024:00
    DaylightMoon above the horizon
    Sunrise
    06:39
    Sunset
    19:24
    Day length
    12 h 45 min
    Sunshine hours
    5 h
    UV index
    7
    high
    Moon
    Last quarter
    Moonrise
    —
    Moonset
    15:02

    The day is 2 min shorter than yesterday.

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

    Solunar feeding periods

    +13% in the windowFriday, September 4
    Feeding windows on the day scale, local time0:0012:0024:00
    Major periodsMinor periods
    • Major06:09–08:09Moon overhead
    • Minor14:32–15:32Moonset
    • Major18:40–20:40Moon 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?

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

    Water

    Gauge height
    9.46 ft
    Streamflow
    687 ft³/s

    USGS gauge SAN JUAN R AT BOLACK RANCH BRDG NR FARMINGTON NM, 2 mi away · measured 2026-09-03 23:30 · data source · provisional data, subject to revision