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Where to fish

  • Forecast
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Ireland / County Roscommon / Island River

Bite forecast: Island River

  • length 5 km
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Best fishing days for the next week

  1. ThursdaySeptember 10weather-based forecast
    65/100high activity

    Cloudy: 11–17 °C

Island River (County Roscommon) — a spot well known among anglers. About 5 km long. The town of Castlerea is nearby. Here you'll find a bite prediction — when fish are active and which hours give the best chances, adjusted for weather and pressure.

SaturdaySeptember 12weather-based forecast
60/100high activity

Drizzle: 10–12 °C

  • WednesdaySeptember 9weather-based forecast
    58/100medium activity

    Cloudy: 10–14 °C

  • Nearby towns

    • Castlerea6 mi
    Loading map…

    Nearby rivers

    • Island River0.8 mi
    • Springfield River4 mi
    • Cloonfad River6 mi
    • Dalgan6 mi

    Nearby water bodies

    • LakeClooncalgy Lough1 mi
    • LakeLough Namucka1 mi
    • LakeCoolcam Lough2 mi
    • LakeLoughapollboy3 mi
    • LakeCorralough3 mi
    • LakePolleagh Lake3 mi
    • LakeLisrivis Lough4 mi
    • LakeCurragh Lake4 mi
    • LakeLough O'Flynn4 mi
    • LakeLevally Lough6 mi

    Bite calendar

    Sunday, September 6

    Aug 31 – Sep 6
    Mon
    Tue
    Wed
    Thu
    Fri
    Sat
    Sun
    Bite activity:highmediumlowslow
    Based on:weatherseasonal
    What is a bite calendar?
    European eelPikePerchAtlantic salmonBreamBrown troutCarpRainbow troutRoachBleakWhite breamRuddTench

    Atlantic salmon

    6/10 · Fair

    Hourly activity

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

    The bite is strong — fish are active. Weather is steady, with no sharp swings — fish behave predictably.

    Peak bite hours

    Best time — 07:00–08:00 (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 4 hPa over the day — fish are usually more active ahead of a weather change.

    Pressure through the day, 4 hPa change
    00:00 · 101823:00 · 1014 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
    +18°

    Cloudy · feels like +16°

    Low / high
    +12°…+19°
    Precipitation
    0.0 mm
    Wind
    17 mph S
    Cloud cover
    100%
    Humidity
    87%
    Pressure
    1010 hPa
    00:00+16°—11 mphsouth wind, 11 mph91%100%
    01:00+16°0.3 mm11 mphsouth wind, 11 mph97%100%
    02:00+16°0.3 mm11 mphsouth wind, 11 mph98%100%
    03:00+16°0.1 mm12 mphsouth wind, 12 mph98%100%
    04:00+17°—13 mphsouth wind, 13 mph98%100%
    05:00+17°0.2 mm13 mphsouth wind, 13 mph98%100%
    06:00+17°0.1 mm13 mphsouth wind, 13 mph97%100%
    07:00+17°—16 mphsouth wind, 16 mph96%100%
    08:00+17°0.1 mm17 mphsouth wind, 17 mph95%100%
    09:00+17°0.1 mm16 mphsouth wind, 16 mph92%100%
    10:00+18°—18 mphsouth wind, 18 mph91%100%
    11:00+18°—20 mphsouth wind, 20 mph88%100%
    12:00+18°—17 mphsouth wind, 17 mph87%100%
    13:00+18°1.0 mm16 mphsouth wind, 16 mph94%100%
    14:00+19°0.2 mm19 mphsouth wind, 19 mph90%72%
    15:00+19°0.1 mm15 mphsouth wind, 15 mph89%100%
    16:00+18°0.6 mm15 mphsouthwest wind, 15 mph96%100%
    17:00+18°0.1 mm15 mphsouthwest wind, 15 mph91%100%
    18:00+17°0.2 mm11 mphsouthwest wind, 11 mph90%100%
    19:00+15°0.1 mm10 mphwest wind, 10 mph90%100%
    20:00+15°—9 mphwest wind, 9 mph84%93%
    21:00+14°—8 mphwest wind, 8 mph89%52%
    22:00+13°—8 mphsouthwest wind, 8 mph89%13%
    23:00+12°—6 mphsouthwest wind, 6 mph93%11%
    +19°+16°+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
    06:50
    Sunset
    20:11
    Day length
    13 h 21 min
    Sunshine hours
    1 h
    UV index
    1
    low
    Moon
    Waning crescent
    Moonrise
    —
    Moonset
    18:32

    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

    +13% in the windowSunday, September 6
    Feeding windows on the day scale, local time0:0012:0024:00
    Major periodsMinor periods
    • Major08:21–10:21Moon overhead
    • Minor18:02–19:02Moonset
    • Major20:52–22:52Moon 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?