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Forecast
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© 2026·AI-powered bite forecast
0.1.0+2161 · b4069346

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United Kingdom / County Down / Clanrye River

Bite forecast: Clanrye River

  • length 56 km
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Best fishing days for the next week

  1. TuesdaySeptember 8weather-based forecast
    61/100high activity

    Partly cloudy: 10–15 °C

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Clanrye River (County Down) — one of the area's fishing spots. About 56 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.

WednesdaySeptember 2weather-based forecast
58/100medium activity

Cloudy: 14–18 °C

  • ThursdaySeptember 3weather-based forecast
    57/100medium activity

    Cloudy: 13–17 °C

  • Nearby towns

    • Rathfriland0.9 mi
    • Castlewellan9 mi

    Bite calendar

    Aug 31 – Sep 6
    Mon
    Tue
    Wed
    Thu
    Fri
    Sat
    Sun
    Bite activity:highmediumlowslow
    Based on:weatherseasonal
    What is a bite calendar?
    BarbelDaceEuropean eelGraylingPikeRuffeWhitefishPerchZanderAtlantic salmonBreamCarpWels catfishRainbow troutBrown troutIdeRoachBleakChubCrucian carpRuddTenchWhite 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 dropping — this usually boosts the bite.

    Peak bite hours

    Best time — 06:00–08:00 (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. 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 6 hPa over the day — fish are usually more active ahead of a weather change.

    Pressure through the day, 6 hPa change
    00:00 · 101723:00 · 1011 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
    +17°

    Drizzle · feels like +15°

    Low / high
    +12°…+19°
    Precipitation
    0.4 mm
    Wind
    19 mph S
    Cloud cover
    100%
    Humidity
    94%
    Pressure
    1005 hPa
    00:00+12°0.2 mm7 mphsoutheast wind, 7 mph93%100%
    01:00+12°0.2 mm8 mphsoutheast wind, 8 mph95%100%
    02:00+13°1.1 mm9 mphsoutheast wind, 9 mph96%100%
    03:00+13°1.1 mm12 mphsoutheast wind, 12 mph96%100%
    04:00+14°1.1 mm14 mphsoutheast wind, 14 mph96%100%
    05:00+15°0.5 mm14 mphsoutheast wind, 14 mph96%100%
    06:00+16°0.5 mm14 mphsouth wind, 14 mph96%100%
    07:00+17°0.5 mm14 mphsouth wind, 14 mph96%100%
    08:00+17°0.2 mm15 mphsouth wind, 15 mph96%100%
    09:00+17°0.2 mm17 mphsouth wind, 17 mph95%100%
    10:00+17°0.2 mm19 mphsouth wind, 19 mph95%100%
    11:00+17°0.4 mm19 mphsouth wind, 19 mph95%100%
    12:00+17°0.4 mm19 mphsouth wind, 19 mph94%100%
    13:00+17°0.4 mm18 mphsouth wind, 18 mph94%97%
    14:00+18°0.3 mm18 mphsouth wind, 18 mph94%89%
    15:00+18°0.3 mm18 mphsouth wind, 18 mph93%78%
    16:00+19°0.3 mm18 mphsouth wind, 18 mph92%72%
    17:00+18°0.5 mm19 mphsouthwest wind, 19 mph90%77%
    18:00+17°0.5 mm20 mphwest wind, 20 mph86%87%
    19:00+16°0.5 mm21 mphnorthwest wind, 21 mph84%89%
    20:00+15°—20 mphnorthwest wind, 20 mph83%72%
    21:00+14°—19 mphnorthwest wind, 19 mph83%48%
    22:00+13°—18 mphnorthwest wind, 18 mph83%36%
    23:00+13°—17 mphwest wind, 17 mph83%51%
    +19°+15°+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
    06:39
    Sunset
    20:02
    Day length
    13 h 23 min
    Sunshine hours
    4 h 46 min
    UV index
    4
    moderate
    Moon
    Waning crescent
    Moonrise
    —
    Moonset
    18:19

    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 windowSunday, September 6
    Feeding windows on the day scale, local time0:0012:0024:00
    Major periodsMinor periods
    • Major08:09–10:09Moon overhead
    • Minor17:49–18:49Moonset
    • Major20:39–22:39Moon 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

    • Shinn River2 mi
    • Newry River5 mi
    • Bann5 mi
    • Upper Bann6 mi
    • Shankys River6 mi
    • Rocky River6 mi
    • Kinnahalla River6 mi
    • Bessbrook River7 mi
    • Rocky Water7 mi
    • Drumadonnell River7 mi

    Nearby water bodies

    • LakeDrum Lough3 mi
    • LakeDerryleckagh Lake4 mi
    • LakeMilltown Lough5 mi
    • LakeHunshigo Lake6 mi
    • LakeLough Brickland6 mi
    • LakeBallyroney Lake6 mi
    • ReservoirBessbrook Pond7 mi
    • ReservoirMilltown Dam7 mi