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Forecast
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© 2026·AI-powered bite forecast
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Ireland / County Laois / Mass Lough

Bite forecast: Mass Lough

  • 3 ha
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Best fishing days for the next week

  1. WednesdaySeptember 2weather-based forecast
    62/100high activity

    Cloudy: 16–20 °C

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Mass Lough (County Laois) — a popular fishing spot. About 3 ha in area. Nearby towns: Abbeyleix, Durrow and Portlaoise. This page shows an hourly bite forecast for today and the week ahead; the algorithm factors in the weather, atmospheric pressure, and the moon phase.

TuesdaySeptember 8weather-based forecast
61/100high activity

Cloudy: 11–18 °C

  • SaturdaySeptember 5weather-based forecast
    60/100high activity

    Cloudy: 9–18 °C

  • Nearby towns

    • Abbeyleix3 mi
    • Durrow5 mi
    • Portlaoise11 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?
    PikeEuropean eelPerchBreamCarpBrown troutRainbow troutRoachBleakRuddTenchWhite bream

    Bleak

    4/10 · Weak

    Hourly activity

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

    The bite is moderate — fish feed in short bursts. A thunderstorm is possible: activity rises before the front and drops after.

    Peak bite hours

    Best time — 11:00–16:00 (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. A thunderstorm is possible — bring a rain jacket, and pack up at the first rumble of thunder.

    Summary

    An average day — best chances during peak windows.

    How this forecast is calculated

    Why this forecast

    The computed water temperature is around 16 °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 °C16 °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 3 hPa over the day — fish are usually more active ahead of a weather change.

    Pressure through the day, 3 hPa change
    00:00 · 101723:00 · 1013 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

    2 SepWednesday, September 2
    +20°

    Cloudy · feels like +19°

    Low / high
    +14°…+20°
    Precipitation
    0.0 mm
    Wind
    13 mph WSW
    Cloud cover
    88%
    Humidity
    85%
    Pressure
    1012 hPa
    00:00+14°0.2 mm10 mphsouth wind, 10 mph95%100%
    01:00+14°1.1 mm8 mphsouth wind, 8 mph96%100%
    02:00+14°2.5 mm7 mphsoutheast wind, 7 mph97%100%
    03:00+14°1.8 mm8 mphsoutheast wind, 8 mph96%100%
    04:00+15°2.5 mm8 mphsouth wind, 8 mph96%100%
    05:00+15°6.4 mm9 mphsoutheast wind, 9 mph97%100%
    06:00+16°1.7 mm11 mphsouth wind, 11 mph97%100%
    07:00+16°0.1 mm9 mphsouthwest wind, 9 mph98%98%
    08:00+17°—9 mphsouthwest wind, 9 mph96%95%
    09:00+17°—9 mphsouthwest wind, 9 mph95%98%
    10:00+18°—10 mphsouthwest wind, 10 mph93%98%
    11:00+18°—11 mphsouthwest wind, 11 mph92%99%
    12:00+20°—13 mphsouthwest wind, 13 mph85%88%
    13:00+20°—12 mphsouthwest wind, 12 mph84%88%
    14:00+20°—12 mphsouthwest wind, 12 mph85%100%
    15:00+20°—15 mphwest wind, 15 mph80%92%
    16:00+20°—15 mphwest wind, 15 mph74%41%
    17:00+20°—14 mphwest wind, 14 mph70%25%
    18:00+20°—10 mphwest wind, 10 mph75%96%
    19:00+19°—9 mphsouthwest wind, 9 mph81%100%
    20:00+19°—9 mphsouthwest wind, 9 mph85%100%
    21:00+18°—11 mphsouthwest wind, 11 mph88%98%
    22:00+18°—11 mphsouthwest wind, 11 mph92%80%
    23:00+16°—10 mphsouthwest wind, 10 mph88%72%
    +20°+17°+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
    06:40
    Sunset
    20:15
    Day length
    13 h 35 min
    Sunshine hours
    4 h 3 min
    UV index
    2
    low
    Moon
    Waning gibbous
    Moonrise
    21:32
    Moonset
    13:36

    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 windowWednesday, September 2
    Feeding windows on the day scale, local time0:0012:0024:00
    Major periodsMinor periods
    • Major04:12–06:12Moon overhead
    • Minor13:06–14:06Moonset
    • Major16:39–18:39Moon underfoot
    • Minor21:02–22:02Moonrise

    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

    • Ouveg3 mi
    • Ballyroan River5 mi
    • Glorín5 mi
    • Nore5 mi
    • Clogh6 mi
    • Gully6 mi
    • Killeen River6 mi
    • Cloghogue6 mi
    • Brokagh River6 mi
    • Dinin8 mi

    Nearby water bodies

    • LakeDiscovery Park Lake6 mi
    • LakeGrantstown Lake9 mi