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Forecast
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© 2026·AI-powered bite forecast
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United Kingdom / Gwynedd / River Afon Mynach

Bite forecast: River Afon Mynach

  • length 7 km
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Best fishing days for the next week

  1. WednesdaySeptember 2weather-based forecast
    56/100medium activity

    Drizzle: 16–19 °C

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River Afon Mynach (Gwynedd) — a popular fishing spot. About 7 km long. The town of Bala is nearby. Here you'll find a bite prediction — when fish are active and which hours give the best chances, adjusted for weather and pressure.

TuesdaySeptember 8weather-based forecast
53/100medium activity

Cloudy: 12–18 °C

  • ThursdaySeptember 3weather-based forecast
    52/100medium activity

    Cloudy: 15–19 °C

  • Nearby towns

    • Bala2 mi

    Bite calendar

    Wednesday, September 2

    Aug 31 – Sep 6
    Mon
    Tue
    Wed
    Thu
    Fri
    Sat
    Sun
    Bite activity:highmediumlowslow
    Based on:weatherseasonal
    What is a bite calendar?
    DaceEuropean eelGraylingPikeBarbelRuffeWhitefishZanderPerchAtlantic salmonBreamBrown troutCarpWels catfishRainbow troutIdeRoachBleakChubCrucian carpWhite breamRuddTench

    Atlantic salmon

    6/10 · Fair

    Hourly activity

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

    The bite is strong — fish are active. A thunderstorm is possible: activity rises before the front and drops after.

    Peak bite hours

    Best time — 06:00–07:00 (dawn bite) and 20:00–22:00 (dusk bite).

    Tactics

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

    Lures

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

    Gear

    No special gear needed — seasonal clothing will do. A thunderstorm is possible — bring a rain jacket, and pack up at the first rumble of thunder.

    Summary

    Worth going — it's a productive day.

    How this forecast is calculated

    Why this forecast

    The computed water temperature is around 16 °C — warmer than the 4–14 °C comfort range for Atlantic salmon: in the heat it drops deeper and feeds less often.

    Computed water temperature by month; the green band is the 4–14 °C comfort rangecomfort 4–14 °C16 °C
    JFMAMJJASOND

    Atlantic salmon 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 Atlantic salmon feeds0:0012:0024:00

    Pressure is dropping 4 hPa over the day — fish are usually more active ahead of a weather change.

    Pressure through the day, 4 hPa change
    00:00 · 101823:00 · 1014 hPa

    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 Atlantic salmon here.

    JFMAMJJASOND

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

    2 SepWednesday, September 2
    +18°

    Drizzle · feels like +16°

    Low / high
    +15°…+19°
    Precipitation
    0.4 mm
    Wind
    19 mph SW
    Cloud cover
    100%
    Humidity
    96%
    Pressure
    1014 hPa
    00:00+17°—14 mphsouthwest wind, 14 mph85%100%
    01:00+17°—13 mphsouthwest wind, 13 mph86%100%
    02:00+17°—12 mphsouthwest wind, 12 mph85%100%
    03:00+16°0.2 mm11 mphsouthwest wind, 11 mph91%100%
    04:00+15°1.7 mm5 mphwest wind, 5 mph98%100%
    05:00+16°6.1 mm13 mphsouth wind, 13 mph97%100%
    06:00+17°1.8 mm14 mphsouth wind, 14 mph97%100%
    07:00+16°3.3 mm12 mphsouth wind, 12 mph97%100%
    08:00+16°4.8 mm19 mphsouth wind, 19 mph97%100%
    09:00+17°2.3 mm22 mphsouth wind, 22 mph96%100%
    10:00+18°0.4 mm20 mphsouthwest wind, 20 mph96%100%
    11:00+18°0.1 mm18 mphsouthwest wind, 18 mph95%100%
    12:00+18°0.4 mm19 mphsouthwest wind, 19 mph96%100%
    13:00+18°0.2 mm19 mphsouthwest wind, 19 mph95%100%
    14:00+18°—18 mphsouthwest wind, 18 mph94%99%
    15:00+19°—17 mphsouthwest wind, 17 mph93%100%
    16:00+19°—16 mphsouthwest wind, 16 mph93%100%
    17:00+19°—18 mphsouthwest wind, 18 mph89%87%
    18:00+18°—17 mphsouthwest wind, 17 mph91%91%
    19:00+18°—17 mphsouthwest wind, 17 mph92%100%
    20:00+18°—17 mphsouthwest wind, 17 mph92%66%
    21:00+18°—15 mphsouthwest wind, 15 mph94%93%
    22:00+18°—15 mphsouthwest wind, 15 mph93%100%
    23:00+18°—18 mphsouthwest wind, 18 mph94%100%
    +19°+17°+15°
    Weather throughout the day
    0:006:0012:0018:0023:00

    Sun and moon

    Wednesday, September 2
    The day: daylight and the hours the moon is above the horizon. Local time0:0012:0024:00
    DaylightMoon above the horizon
    Sunrise
    06:28
    Sunset
    20:03
    Day length
    13 h 35 min
    Sunshine hours
    1 h 18 min
    UV index
    1
    low
    Moon
    Waning gibbous
    Moonrise
    21:20
    Moonset
    13:24

    The day is 4 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 windowWednesday, September 2
    Feeding windows on the day scale, local time0:0012:0024:00
    Major periodsMinor periods
    • Major04:00–06:00Moon overhead
    • Minor12:54–13:54Moonset
    • Major16:27–18:27Moon underfoot
    • Minor20:50–21:50Moonrise

    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?

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