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Where to fish

  • Forecast
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© 2026·AI-powered bite forecast
0.1.0+2163 · 92c14a40

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Ireland / County Mayo / Blacksod Bay

Bite forecast: Blacksod Bay

  • 111.2 km²
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Best fishing days for the next week

  1. WednesdaySeptember 9weather-based forecast
    69/100high activity

    Cloudy: 10–13 °C

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Nearby rivers

  • Munhin River7 mi

Nearby water bodies

  • LakeLough Nahelly2 mi
  • LakeLeam Lough4 mi
  • LakeCross Lough5 mi
  • LakeTermoncarragh Lake7 mi
  • LakeCarrowmore Lake8 mi
  • LakeDrumsleed Loughs9 mi
  • BayBroadhaven Bay9 mi

Blacksod Bay (County Mayo) — a spot well known among anglers. About 111.2 km² in area. Nearest town — Belmullet. A coastal water: the bite here is modelled for the sea, not for a river or a lake. See when the bite is best: hourly fish activity for the days ahead, computed from the weather, pressure, and season.

MondaySeptember 7weather-based forecast
66/100high activity

Cloudy: 13–15 °C

  • ThursdaySeptember 3weather-based forecast
    59/100medium activity

    Cloudy: 14–17 °C

  • Nearby towns

    • Belmullet0.2 mi

    Bite calendar

    Thursday, September 3

    Aug 31 – Sep 6
    Mon
    Tue
    Wed
    Thu
    Fri
    Sat
    Sun
    Bite activity:highmediumlowslow
    Based on:weatherseasonal
    What is a bite calendar?
    Conger eelEuropean eelFlounderPollackThornback rayAtlantic mackerelBallan wrasseEuropean sea bassGrey mulletAtlantic salmonBrown troutPlaiceWhitingAtlantic cod

    Atlantic cod

    4/10 · Weak

    Hourly activity

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

    The bite is moderate — fish feed in short bursts. 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

    Look for structure — reefs, flats, channel edges; work them slowly near the bottom.

    Lures

    The water's turning murky — go with bright, noisy lures: pirk or lugworm bottom rig.

    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 14 °C — warmer than the 4–12 °C comfort range for Atlantic cod: in the heat it drops deeper and feeds less often.

    Computed water temperature by month; the green band is the 4–12 °C comfort rangecomfort 4–12 °C14 °C
    JFMAMJJASOND

    Atlantic cod 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 cod feeds0:0012:0024:00

    Pressure is dropping 3 hPa over the day — fish are usually more active ahead of a weather change.

    Pressure through the day, 3 hPa change
    00:00 · 101123:00 · 1008 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 Atlantic cod here.

    JFMAMJJASOND

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

    Tides

    • Low water03:30-1.6 m
    • High water09:490.9 m
    • Low water15:53-1.3 m
    • High water22:070.8 m
    0:006:0012:0018:0023:000:006:0012:0018:0023:00
    Sea level height by hour
    00:0001:0002:0003:0004:0005:0006:0007:0008:0009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:0021:0022:0023:00
    -0.1 m-0.8 m-1.3 m-1.6 m-1.6 m-1.3 m-0.8 m-0.1 m0.4 m0.8 m0.9 m0.7 m0.2 m-0.4 m-0.9 m-1.2 m-1.3 m-1.2 m-0.7 m-0.2 m0.3 m0.7 m0.8 m0.7 m

    Open-Meteo tide model, grid point 2.2 mi away

    Water

    Water temp.
    17 °C
    In the model
    14 °C
    Wave
    1.3 m
    Period
    7 s

    Open-Meteo Marine model, grid cell 2.2 mi from the waterbody. Values are daily means.

    3 SepThursday, September 3
    +17°

    Cloudy · feels like +15°

    Low / high
    +13°…+17°
    Precipitation
    0.0 mm
    Wind
    13 mph WSW
    Cloud cover
    100%
    Humidity
    81%
    Pressure
    1011 hPa
    00:00+16°—14 mphwest wind, 14 mph91%100%
    01:00+15°—11 mphsouthwest wind, 11 mph91%70%
    02:00+15°—11 mphwest wind, 11 mph91%70%
    03:00+15°—11 mphsouthwest wind, 11 mph91%71%
    04:00+15°—11 mphsouthwest wind, 11 mph91%77%
    05:00+15°—10 mphsouthwest wind, 10 mph91%75%
    06:00+15°—9 mphsouthwest wind, 9 mph90%61%
    07:00+15°—9 mphsouthwest wind, 9 mph88%72%
    08:00+15°—9 mphsouthwest wind, 9 mph87%100%
    09:00+16°—11 mphsouthwest wind, 11 mph86%88%
    10:00+17°—16 mphsouthwest wind, 16 mph83%68%
    11:00+17°—14 mphsouthwest wind, 14 mph83%91%
    12:00+17°—13 mphsouthwest wind, 13 mph81%100%
    13:00+16°0.1 mm14 mphsouthwest wind, 14 mph79%100%
    14:00+15°0.3 mm14 mphsouthwest wind, 14 mph84%100%
    15:00+15°0.5 mm15 mphsouthwest wind, 15 mph86%100%
    16:00+15°0.5 mm14 mphsouthwest wind, 14 mph88%100%
    17:00+15°0.9 mm13 mphsouthwest wind, 13 mph92%100%
    18:00+14°1.4 mm13 mphsouthwest wind, 13 mph93%100%
    19:00+14°0.5 mm13 mphsouthwest wind, 13 mph93%100%
    20:00+14°—14 mphsouthwest wind, 14 mph91%100%
    21:00+14°—14 mphsouthwest wind, 14 mph89%100%
    22:00+14°—14 mphsouthwest wind, 14 mph87%97%
    23:00+13°0.7 mm13 mphwest wind, 13 mph92%100%
    +17°+15°+13°
    Weather throughout the day
    0:006:0012:0018:0023:00

    Sun and moon

    Thursday, September 3
    The day: daylight and the hours the moon is above the horizon. Local time0:0012:0024:00
    DaylightMoon above the horizon
    Sunrise
    06:49
    Sunset
    20:24
    Day length
    13 h 35 min
    Sunshine hours
    3 h 16 min
    UV index
    2
    low
    Moon
    Last quarter
    Moonrise
    22:07
    Moonset
    15:25

    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

    +14% in the windowThursday, September 3
    Feeding windows on the day scale, local time0:0012:0024:00
    Major periodsMinor periods
    • Major05:20–07:20Moon overhead
    • Minor14:55–15:55Moonset
    • Major17:50–19:50Moon underfoot
    • Minor21:37–22:37Moonrise

    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?