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

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Ireland / County Mayo / Clew Bay

Bite forecast: Clew Bay

  • 275.9 km²
Loading map…

Best fishing days for the next week

  1. TuesdaySeptember 8weather-based forecast
    65/100high activity

    Clear: 10–14 °C

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Nearby rivers

  • Owennabrockagh4 mi
  • Glenthomas River6 mi

Nearby water bodies

  • LakeCoolbareen Lough4 mi
  • LakeCarrowbeg Lough4 mi
  • LakeAnnagh Lough4 mi
  • LakeCarrowbeg Lough4 mi
  • LakeCravey's Lough4 mi
  • LakeBallin Lough4 mi
  • LakeBroad Lough4 mi
  • LakeDoontrusk Lough5 mi
  • LakeCarheenbrack Lough5 mi
  • LakeLough Fadda5 mi

Clew Bay (County Mayo) — a spot well known among anglers. About 275.9 km² in area. Nearby towns: Newport, Louisburgh and Westport. 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.

WednesdaySeptember 2weather-based forecast
61/100high activity

Drizzle: 15–17 °C

  • SaturdaySeptember 5weather-based forecast
    61/100high activity

    Drizzle: 11–17 °C

  • Nearby towns

    • Newport0 mi
    • Louisburgh0.7 mi
    • Westport0.9 mi

    Bite calendar

    Wednesday, September 2

    Aug 31 – Sep 6
    Mon
    Tue
    Wed
    Thu
    Fri
    Sat
    Sun
    Bite activity:highmediumlowslow
    Based on:weatherseasonal
    What is a bite calendar?
    Atlantic mackerelBallan wrasseConger eelEuropean eelEuropean sea bassFlounderGrey mulletPollackThornback rayAtlantic salmonBrown troutPlaiceWhitingAtlantic cod

    Atlantic cod

    5/10 · Fair

    Hourly activity

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

    The bite is moderate — fish feed in short bursts. Pressure is rising — activity tends to be more subdued.

    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 4 hPa over the day — fish are usually more active ahead of a weather change.

    Pressure through the day, 4 hPa change
    00:00 · 101423:00 · 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 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 water02:41-2.0 m
    • High water08:591.3 m
    • Low water15:02-1.7 m
    • High water21:131.2 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
    -0.7 m-1.4 m-1.9 m-2.0 m-1.6 m-0.9 m-0.2 m0.6 m1.1 m1.3 m1.1 m0.5 m-0.2 m-0.9 m-1.4 m-1.7 m-1.5 m-0.9 m-0.2 m0.4 m0.9 m1.2 m1.1 m0.6 m

    Open-Meteo tide model, grid point 2.2 mi away

    Water

    Water temp.
    18 °C
    In the model
    14 °C
    Wave
    0.6 m
    Period
    5 s

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

    2 SepWednesday, September 2
    +17°

    Drizzle · feels like +17°

    Low / high
    +14°…+17°
    Precipitation
    0.2 mm
    Wind
    9 mph SW
    Cloud cover
    100%
    Humidity
    96%
    Pressure
    1010 hPa
    00:00+14°—3 mphsouth wind, 3 mph96%100%
    01:00+14°—2 mphsouth wind, 2 mph96%100%
    02:00+14°—3 mphsoutheast wind, 3 mph97%100%
    03:00+14°0.8 mm4 mphsoutheast wind, 4 mph98%100%
    04:00+14°0.5 mm4 mphsoutheast wind, 4 mph98%100%
    05:00+14°—2 mphsoutheast wind, 2 mph99%100%
    06:00+15°—5 mphsoutheast wind, 5 mph98%100%
    07:00+15°—4 mphsouth wind, 4 mph98%100%
    08:00+15°0.1 mm5 mphsouth wind, 5 mph98%100%
    09:00+15°—6 mphsouth wind, 6 mph98%100%
    10:00+16°—7 mphsouth wind, 7 mph99%100%
    11:00+16°0.3 mm7 mphsouth wind, 7 mph99%100%
    12:00+17°0.2 mm9 mphsouthwest wind, 9 mph96%100%
    13:00+17°—11 mphsouthwest wind, 11 mph96%99%
    14:00+16°0.2 mm11 mphsouthwest wind, 11 mph96%100%
    15:00+17°—11 mphsouthwest wind, 11 mph93%100%
    16:00+16°—11 mphsouthwest wind, 11 mph92%100%
    17:00+16°0.2 mm9 mphsouthwest wind, 9 mph95%100%
    18:00+17°0.4 mm11 mphsouthwest wind, 11 mph98%98%
    19:00+17°0.1 mm12 mphsouthwest wind, 12 mph99%100%
    20:00+17°—13 mphsouthwest wind, 13 mph97%99%
    21:00+16°—13 mphsouthwest wind, 13 mph94%100%
    22:00+16°0.1 mm12 mphsouthwest wind, 12 mph94%100%
    23:00+16°0.1 mm12 mphwest wind, 12 mph94%100%
    +17°+16°+14°
    Weather throughout the day
    0:006:0012:0018:0023:00

    Sun and moon

    Wednesday, September 2
    The day: daylight and the hours the moon is above the horizon. Local time0:0012:0024:00
    DaylightMoon above the horizon
    Sunrise
    06:48
    Sunset
    20:26
    Day length
    13 h 38 min
    Sunshine hours
    0 min
    UV index
    1
    low
    Moon
    Waning gibbous
    Moonrise
    21:38
    Moonset
    13:55

    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 windowWednesday, September 2
    Feeding windows on the day scale, local time0:0012:0024:00
    Major periodsMinor periods
    • Major04:25–06:25Moon overhead
    • Minor13:25–14:25Moonset
    • Major16:52–18:52Moon underfoot
    • Minor21:08–22:08Moonrise

    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?