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

Bite forecast: Red Moss River

  • length 7 km
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Best fishing days for the next week

  1. MondaySeptember 7weather-based forecast
    61/100high activity

    Cloudy: 12–16 °C

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Nearby rivers

  • Aughnaleck River0.6 mi
  • Windy Gap or Pigeon Rock River1 mi
  • Cassy River2 mi
  • Yellow Water River2 mi
  • White Water3 mi
  • Rowan Tree River3 mi
  • Rocky Water3 mi
  • Kilbroney River3 mi
  • Kilkeel River4 mi
  • Shankys River4 mi

Nearby water bodies

  • ReservoirSilent Valley Reservoir4 mi
  • ReservoirSpelga Reservoir4 mi
  • LakeLough Shannagh4 mi
  • LakeBinian Lough5 mi
  • LakeBlue Lough5 mi
  • ReservoirBen Crom Reservoir5 mi
  • ReservoirFofanny Reservoir6 mi

Red Moss River (County Down) — a popular fishing spot. About 7 km long. Nearby towns: Rathfriland and Castlewellan. See when the bite is best: hourly fish activity for the days ahead, computed from the weather, pressure, and season.

TuesdaySeptember 8weather-based forecast
60/100high activity

Drizzle: 10–14 °C

  • SundaySeptember 6weather-based forecast
    59/100medium activity

    Partly cloudy: 15–18 °C

  • Nearby towns

    • Rathfriland9 mi
    • Castlewellan11 mi

    Bite calendar

    7–Sep 13
    Mon
    Tue
    Wed
    Thu
    Fri
    Sat
    Sun
    Bite activity:highmediumlowslow
    Based on:weatherseasonal
    What is a bite calendar?
    European eelBarbelDacePikeRuffeWhitefishZanderGraylingPerchAtlantic salmonRainbow troutBreamBrown troutWels catfishIdeCarpChubRoachBleakCrucian carpWhite breamRuddTench

    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 dropping — this usually boosts the bite.

    Peak bite hours

    Best time — 06:00–08:00 (dawn bite) and 20:00–21:00 (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 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 2 hPa over the day — fish are usually more active ahead of a weather change.

    Pressure through the day, 2 hPa change
    00:00 · 100723:00 · 1005 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

    8 SepTuesday, September 8
    +14°

    Drizzle · feels like +8°

    Low / high
    +10°…+14°
    Precipitation
    0.1 mm
    Wind
    21 mph WSW
    Cloud cover
    87%
    Humidity
    69%
    Pressure
    1006 hPa
    00:00+10°—17 mphsouthwest wind, 17 mph77%0%
    01:00+10°—17 mphsouthwest wind, 17 mph77%0%
    02:00+10°—17 mphsouthwest wind, 17 mph77%14%
    03:00+10°—17 mphsouthwest wind, 17 mph78%33%
    04:00+10°—16 mphsouthwest wind, 16 mph79%47%
    05:00+10°—15 mphsouthwest wind, 15 mph81%48%
    06:00+10°—15 mphsouthwest wind, 15 mph83%43%
    07:00+10°—14 mphsouthwest wind, 14 mph83%44%
    08:00+11°—15 mphsouthwest wind, 15 mph81%57%
    09:00+12°—17 mphsouthwest wind, 17 mph77%76%
    10:00+13°—19 mphsouthwest wind, 19 mph74%89%
    11:00+13°0.1 mm20 mphwest wind, 20 mph71%91%
    12:00+14°0.1 mm21 mphwest wind, 21 mph69%87%
    13:00+14°0.1 mm21 mphwest wind, 21 mph69%83%
    14:00+14°0.1 mm21 mphwest wind, 21 mph71%81%
    15:00+13°0.1 mm19 mphwest wind, 19 mph76%80%
    16:00+13°0.1 mm18 mphwest wind, 18 mph79%75%
    17:00+13°0.2 mm17 mphwest wind, 17 mph81%62%
    18:00+13°0.2 mm17 mphwest wind, 17 mph81%47%
    19:00+12°0.2 mm17 mphwest wind, 17 mph82%41%
    20:00+12°—17 mphwest wind, 17 mph83%57%
    21:00+12°—17 mphwest wind, 17 mph83%83%
    22:00+11°—18 mphwest wind, 18 mph84%95%
    23:00+12°—18 mphwest wind, 18 mph84%79%
    +14°+12°+10°
    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
    06:43
    Sunset
    19:57
    Day length
    13 h 14 min
    Sunshine hours
    9 h 4 min
    UV index
    4
    moderate
    Moon
    Waning crescent
    Moonrise
    02:41
    Moonset
    19:06

    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 windowTuesday, September 8
    Feeding windows on the day scale, local time0:0012:0024:00
    Major periodsMinor periods
    • Minor02:11–03:11Moonrise
    • Major10:06–12:06Moon overhead
    • Minor18:36–19:36Moonset
    • Major22:33–00:00Moon 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?