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© 2026·AI-powered bite forecast
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United Kingdom / Powys / River Afon Mellte

Bite forecast: River Afon Mellte

  • length 7 km
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Best fishing days for the next week

  1. SaturdaySeptember 12weather-based forecast
    68/100high activity

    Cloudy: 5–15 °C

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River Afon Mellte (Powys) — one of the area's fishing spots. About 7 km long. See when the bite is best: hourly fish activity for the days ahead, computed from the weather, pressure, and season.

ThursdaySeptember 10weather-based forecast
67/100high activity

Drizzle: 11–17 °C

  • MondaySeptember 7weather-based forecast
    65/100high activity

    Cloudy: 13–16 °C

  • Bite calendar

    Sunday, September 6

    Aug 31 – Sep 6
    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.

    DaceEuropean eelGraylingWhitefishBarbelBreamCarpWels catfishPikeRuffeZanderPerchAtlantic salmonBrown troutCrucian carpIdeRainbow troutBleakChubRoachRuddTenchWhite bream

    Atlantic salmon

    6/10 · Fair

    Hourly activity

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

    The bite is strong — fish are active. Pressure is rising — activity tends to be more subdued.

    Peak bite hours

    Best time — 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: salmon spoon or salmon 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 15 °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 °C15 °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 9 hPa over the day — fish are usually more active ahead of a weather change.

    Pressure through the day, 9 hPa change
    00:00 · 102523:00 · 1016 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

    6 SepSunday, September 6
    +19°

    Clear · feels like +17°

    Low / high
    +12°…+22°
    Precipitation
    0.0 mm
    Wind
    11 mph S
    Cloud cover
    0%
    Humidity
    66%
    Pressure
    1019 hPa
    00:00+12°—3 mphsouth wind, 3 mph81%100%
    01:00+12°—3 mphsouth wind, 3 mph83%100%
    02:00+12°—4 mphsouth wind, 4 mph80%100%
    03:00+12°0.4 mm4 mphsouth wind, 4 mph81%100%
    04:00+12°0.8 mm4 mphsouth wind, 4 mph85%100%
    05:00+12°0.1 mm4 mphsouth wind, 4 mph88%100%
    06:00+12°0.8 mm5 mphsouth wind, 5 mph95%100%
    07:00+12°1.0 mm6 mphsouth wind, 6 mph97%100%
    08:00+13°0.4 mm6 mphsouth wind, 6 mph93%100%
    09:00+14°—9 mphsouth wind, 9 mph88%70%
    10:00+15°—10 mphsouth wind, 10 mph85%28%
    11:00+17°—10 mphsouth wind, 10 mph75%0%
    12:00+19°—11 mphsouth wind, 11 mph66%0%
    13:00+20°—12 mphsouth wind, 12 mph61%95%
    14:00+21°—13 mphsouth wind, 13 mph58%14%
    15:00+22°—14 mphsouth wind, 14 mph55%28%
    16:00+22°—12 mphsouth wind, 12 mph55%100%
    17:00+21°—9 mphsouthwest wind, 9 mph64%100%
    18:00+21°—8 mphsouthwest wind, 8 mph66%100%
    19:00+19°—8 mphsouthwest wind, 8 mph70%100%
    20:00+18°—9 mphsouthwest wind, 9 mph76%100%
    21:00+17°—9 mphsouthwest wind, 9 mph80%100%
    22:00+16°—8 mphsouthwest wind, 8 mph88%100%
    23:00+16°—8 mphsouthwest wind, 8 mph94%100%
    +22°+17°+12°
    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
    06:32
    Sunset
    19:49
    Day length
    13 h 17 min
    Sunshine hours
    8 h 15 min
    UV index
    4
    moderate
    Moon
    Waning crescent
    Moonrise
    —
    Moonset
    17:57

    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 windowSunday, September 6
    Feeding windows on the day scale, local time0:0012:0024:00
    Major periodsMinor periods
    • Major08:00–10:00Moon overhead
    • Minor17:27–18:27Moonset
    • Major20:31–22:31Moon 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?

    Nearby rivers

    • Afon Mellte0.2 mi
    • Afon Hepste0.7 mi
    • Porth yr Ogof Main Stream0.9 mi
    • River Neath1 mi
    • Sychryd2 mi
    • River Mellte2 mi
    • Afon Pyrddin3 mi
    • Nant y Bryn4 mi
    • Dringarth River4 mi

    Nearby water bodies

    • ReservoirPenderyn Reservoir3 mi
    • ReservoirNant Moel Reservoir4 mi
    • LakeLlyn Fach5 mi