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© 2026·AI-powered bite forecast
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United Kingdom / County Down / Mullagh River

Bite forecast: Mullagh River

  • length 4 km
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Best fishing days for the next week

  1. WednesdaySeptember 9weather-based forecast
    63/100high activity

    Partly cloudy: 8–14 °C

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Nearby rivers

  • Aughrim River2 mi
  • Kilkeel River2 mi
  • White Water4 mi
  • Annalong River5 mi
  • Spence's River5 mi
  • Red Moss River6 mi
  • Aughnaleck River6 mi
  • Windy Gap or Pigeon Rock River7 mi
  • Cassy River7 mi
  • Bloody Bridge River8 mi

Nearby water bodies

  • ReservoirSilent Valley Reservoir5 mi
  • LakeBinian Lough5 mi
  • LakeBlue Lough6 mi
  • ReservoirBen Crom Reservoir7 mi
  • LakeLough Shannagh7 mi
  • ReservoirSpelga Reservoir8 mi
  • ReservoirFofanny Reservoir9 mi

Mullagh River (County Down) — a popular fishing spot. About 4 km long. Nearest town — Castlewellan. See when the bite is best: hourly fish activity for the days ahead, computed from the weather, pressure, and season.

SundaySeptember 6weather-based forecast
59/100medium activity

Cloudy: 16–19 °C

  • MondaySeptember 7weather-based forecast
    57/100medium activity

    Cloudy: 12–15 °C

  • Nearby towns

    • Castlewellan12 mi

    Bite calendar

    7–Sep 13
    Mon
    Tue
    Wed
    Thu
    Fri
    Sat
    Sun
    Bite activity:highmediumlowslow
    Based on:weatherseasonal
    What is a bite calendar?
    DaceEuropean eelGraylingPikeWhitefishBarbelRuffeZanderBreamPerchAtlantic salmonRainbow troutBrown troutCarpWels catfishIdeRoachChubCrucian carpBleakRuddWhite breamTench

    Atlantic salmon

    7/10 · Good

    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 — 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

    In clear water, natural colors work best: salmon spoon or salmon fly.

    Gear

    Pack transitional-season clothing — mornings and evenings are chilly.

    Summary

    Worth going — it's a productive day.

    How this forecast is calculated

    Why this forecast

    The computed water temperature is around 13 °C — inside the 4–14 °C comfort range for Atlantic salmon, so baseline activity is high.

    Computed water temperature by month; the green band is the 4–14 °C comfort rangecomfort 4–14 °C13 °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 · 101323:00 · 1009 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

    9 SepWednesday, September 9
    +13°

    Partly cloudy · feels like +9°

    Low / high
    +8°…+14°
    Precipitation
    0.0 mm
    Wind
    13 mph NW
    Cloud cover
    67%
    Humidity
    64%
    Pressure
    1016 hPa
    00:00+10°—11 mphnorthwest wind, 11 mph86%28%
    01:00+9°—11 mphnorthwest wind, 11 mph88%30%
    02:00+9°—11 mphnorthwest wind, 11 mph90%27%
    03:00+9°—10 mphnorthwest wind, 10 mph92%21%
    04:00+9°—10 mphnorthwest wind, 10 mph94%13%
    05:00+8°—10 mphnorthwest wind, 10 mph95%5%
    06:00+8°—10 mphnorthwest wind, 10 mph95%0%
    07:00+9°—10 mphnorthwest wind, 10 mph93%0%
    08:00+9°—10 mphnorthwest wind, 10 mph89%6%
    09:00+10°—10 mphnorthwest wind, 10 mph83%16%
    10:00+11°—10 mphnorthwest wind, 10 mph76%29%
    11:00+12°—12 mphnorthwest wind, 12 mph69%48%
    12:00+13°—13 mphnorthwest wind, 13 mph64%67%
    13:00+14°—15 mphnorthwest wind, 15 mph63%84%
    14:00+14°—15 mphnorthwest wind, 15 mph64%98%
    15:00+14°—15 mphnorthwest wind, 15 mph65%100%
    16:00+14°—14 mphwest wind, 14 mph66%100%
    17:00+14°—12 mphwest wind, 12 mph68%100%
    18:00+13°—11 mphwest wind, 11 mph70%100%
    19:00+13°—10 mphwest wind, 10 mph72%100%
    20:00+13°—8 mphwest wind, 8 mph75%100%
    21:00+12°—6 mphwest wind, 6 mph78%100%
    22:00+12°—5 mphwest wind, 5 mph81%100%
    23:00+11°—3 mphsouthwest wind, 3 mph84%100%
    +14°+11°+8°
    Weather throughout the day
    0:006:0012:0018:0023:00

    Sun and moon

    Wednesday, September 9
    The day: daylight and the hours the moon is above the horizon. Local time0:0012:0024:00
    DaylightMoon above the horizon
    Sunrise
    06:45
    Sunset
    19:54
    Day length
    13 h 9 min
    Sunshine hours
    11 h 34 min
    UV index
    3
    moderate
    Moon
    Waning crescent
    Moonrise
    04:14
    Moonset
    19:20

    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

    +12% in the windowWednesday, September 9
    Feeding windows on the day scale, local time0:0012:0024:00
    Major periodsMinor periods
    • Minor03:44–04:44Moonrise
    • Major10:59–12:59Moon overhead
    • Minor18:50–19:50Moonset

    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?