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Forecast
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© 2026·AI-powered bite forecast
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United Kingdom / Conwy / Lake Llyn Cowlyd

Bite forecast: Lake Llyn Cowlyd

  • 1 km²
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Best fishing days for the next week

  1. TuesdaySeptember 8weather-based forecast
    68/100high activity

    Cloudy: 10–17 °C

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Nearby rivers

  • Afon Llugwy2 mi
  • Afon Crafnant3 mi
  • Nant Gwryd3 mi
  • River Conwy4 mi

Nearby water bodies

  • LakeLlyn Crafnant2 mi
  • LakeLlyn Eigiau2 mi
  • ReservoirFfynnon Llugwy2 mi
  • ReservoirLlyn Geirionydd2 mi
  • LakeLlyn Bychan2 mi
  • ReservoirLlyn Melynllyn3 mi
  • ReservoirLlyn Bodgynydd3 mi
  • ReservoirLlyn Goddionduon3 mi
  • ReservoirLlyn Glangors3 mi
  • ReservoirLlyn Dulyn3 mi

Lake Llyn Cowlyd (Conwy) — one of the area's fishing spots. About 1 km² in area. Nearby towns: Llandudno Junction and Colwyn Bay. See when the bite is best: hourly fish activity for the days ahead, computed from the weather, pressure, and season.

SundaySeptember 6weather-based forecast
65/100high activity

Cloudy: 16–19 °C

  • ThursdaySeptember 3weather-based forecast
    64/100high activity

    Cloudy: 15–17 °C

  • Nearby towns

    • Llandudno Junction10 mi
    • Colwyn Bay12 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?
    European eelPikeWhitefishWels catfishDaceRuffeZanderBreamBrown troutCarpPerchRainbow troutChubIdeBleakCrucian carpRoachWhite breamRuddTench

    Bleak

    5/10 · Fair

    Hourly activity

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

    The bite is moderate — fish feed in short bursts. Weather is steady, with no sharp swings — fish behave predictably.

    Peak bite hours

    Best time — 11:00–15:00 (daytime activity).

    Tactics

    Chum one spot near a drop-off and wait for fish to arrive — don't chase them.

    Lures

    Today's bait — maggot or small hook with dough bait. In cold or murky water, add scent to your chum.

    Gear

    No special gear needed — seasonal clothing will do. Rain is expected — don't forget a rain jacket or a waterproof shell.

    Summary

    An average day — best chances during peak windows.

    How this forecast is calculated

    Why this forecast

    The computed water temperature is around 15 °C — inside the 14–26 °C comfort range for Bleak, so baseline activity is high.

    Computed water temperature by month; the green band is the 14–26 °C comfort rangecomfort 14–26 °C15 °C
    JFMAMJJASOND

    Bleak feeds by day — between sunrise and sunset; their times are in the sun-and-moon card above.

    The day: daylight hours and when Bleak 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 · 101823:00 · 1012 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 average month for Bleak here.

    JFMAMJJASOND

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

    6 SepSunday, September 6
    +19°

    Cloudy · feels like +14°

    Low / high
    +13°…+19°
    Precipitation
    0.0 mm
    Wind
    27 mph SSW
    Cloud cover
    87%
    Humidity
    80%
    Pressure
    1009 hPa
    00:00+13°0.7 mm10 mphsouth wind, 10 mph92%100%
    01:00+13°0.7 mm11 mphsouth wind, 11 mph92%100%
    02:00+14°—13 mphsouth wind, 13 mph92%99%
    03:00+15°—14 mphsouth wind, 14 mph92%98%
    04:00+16°—15 mphsouthwest wind, 15 mph92%98%
    05:00+16°—14 mphsouth wind, 14 mph92%99%
    06:00+16°—14 mphsouth wind, 14 mph92%100%
    07:00+16°—14 mphsouth wind, 14 mph92%100%
    08:00+17°—16 mphsouth wind, 16 mph91%94%
    09:00+17°—18 mphsouth wind, 18 mph88%86%
    10:00+17°—21 mphsouthwest wind, 21 mph86%81%
    11:00+18°—24 mphsouthwest wind, 24 mph83%83%
    12:00+19°—27 mphsouthwest wind, 27 mph80%87%
    13:00+19°—28 mphsouthwest wind, 28 mph78%91%
    14:00+19°0.1 mm27 mphsouthwest wind, 27 mph79%92%
    15:00+19°0.1 mm24 mphsouth wind, 24 mph82%92%
    16:00+19°0.1 mm22 mphsouth wind, 22 mph84%92%
    17:00+18°0.3 mm22 mphsouthwest wind, 22 mph85%93%
    18:00+18°0.3 mm23 mphsouthwest wind, 23 mph86%94%
    19:00+17°0.3 mm23 mphsouthwest wind, 23 mph87%95%
    20:00+16°0.2 mm22 mphsouthwest wind, 22 mph87%94%
    21:00+14°0.2 mm20 mphwest wind, 20 mph88%93%
    22:00+13°0.2 mm19 mphwest wind, 19 mph88%91%
    23:00+13°0.1 mm18 mphwest wind, 18 mph88%93%
    +19°+16°+13°
    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
    06:33
    Sunset
    19:52
    Day length
    13 h 19 min
    Sunshine hours
    10 h
    UV index
    4
    moderate
    Moon
    Waning crescent
    Moonrise
    —
    Moonset
    18:04

    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

    +11% in the windowSunday, September 6
    Feeding windows on the day scale, local time0:0012:0024:00
    Major periodsMinor periods
    • Major08:00–10:00Moon overhead
    • Minor17:34–18:34Moonset
    • 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?