Where to fish

  • Forecast
  • Catches

Mine

  • Favorites

Where to fish

  • Forecast
  • Catches

Mine

  • Favorites
Forecast
AboutHow the forecast worksWhere fish livePrivacyTerms[email protected]
© 2026·AI-powered bite forecast
0.1.0+2161 · b4069346

We use cookies for analytics and advertising. Cookies necessary for the site to function are always kept. Learn more

Ireland / County Cork / River Blackwater

Bite forecast: River Blackwater

  • length 123 km
  • Flows into Celtic Sea
Loading map…

Best fishing days for the next week

  1. ThursdaySeptember 3weather-based forecast
    57/100medium activity

    Cloudy: 15–18 °C

River Blackwater (County Cork) — one of the area's fishing spots. About 123 km long. Flows into Celtic Sea. Close by — Fermoy, Mallow and Millstreet. A smart bite calendar — moon phase, atmospheric pressure, and weather combined into an hourly fish-activity forecast for the coming days.

TuesdaySeptember 8weather-based forecast
57/100medium activity

Drizzle: 12–17 °C

  • SaturdaySeptember 5weather-based forecast
    56/100medium activity

    Cloudy: 3–14 °C

  • Nearby towns

    • Fermoy0.1 mi
    • Mallow0.3 mi
    • Millstreet1 mi
    Loading map…

    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 eelAtlantic salmonBreamCarpPerchBrown troutRainbow troutRoachBleakWhite breamRuddTench

    Atlantic salmon

    6/10 · Fair

    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 — 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. 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 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 flat: it moves no more than 1 hPa over the day, so the weather isn't shifting today's bite.

    Pressure through the day, 1 hPa change
    00:00 · 101523:00 · 1016 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

    2 SepWednesday, September 2
    +16°

    Drizzle · feels like +14°

    Low / high
    +15°…+17°
    Precipitation
    0.1 mm
    Wind
    18 mph WSW
    Cloud cover
    99%
    Humidity
    98%
    Pressure
    1014 hPa
    00:00+15°0.5 mm17 mphsouth wind, 17 mph99%100%
    01:00+15°2.0 mm15 mphsouth wind, 15 mph99%100%
    02:00+16°1.7 mm16 mphsouthwest wind, 16 mph100%100%
    03:00+16°0.6 mm17 mphsouthwest wind, 17 mph100%100%
    04:00+16°0.7 mm16 mphsouthwest wind, 16 mph100%100%
    05:00+16°0.3 mm14 mphsouthwest wind, 14 mph99%100%
    06:00+16°0.8 mm15 mphsouthwest wind, 15 mph100%100%
    07:00+16°0.3 mm14 mphsouthwest wind, 14 mph100%100%
    08:00+16°0.2 mm13 mphsouthwest wind, 13 mph100%100%
    09:00+16°0.2 mm15 mphwest wind, 15 mph100%100%
    10:00+16°0.1 mm17 mphwest wind, 17 mph100%100%
    11:00+16°0.2 mm15 mphwest wind, 15 mph100%100%
    12:00+16°0.1 mm18 mphwest wind, 18 mph98%99%
    13:00+17°—17 mphwest wind, 17 mph94%86%
    14:00+17°—17 mphwest wind, 17 mph87%88%
    15:00+17°—13 mphwest wind, 13 mph91%100%
    16:00+16°0.5 mm13 mphsouthwest wind, 13 mph99%100%
    17:00+17°1.0 mm14 mphsouthwest wind, 14 mph100%100%
    18:00+17°0.8 mm16 mphsouthwest wind, 16 mph100%100%
    19:00+17°0.1 mm17 mphwest wind, 17 mph100%100%
    20:00+17°—17 mphwest wind, 17 mph100%100%
    21:00+16°—13 mphwest wind, 13 mph99%100%
    22:00+16°—14 mphwest wind, 14 mph99%97%
    23:00+16°—12 mphwest wind, 12 mph99%98%
    +17°+16°+15°
    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
    06:50
    Sunset
    20:21
    Day length
    13 h 31 min
    Sunshine hours
    2 h
    UV index
    2
    low
    Moon
    Waning gibbous
    Moonrise
    21:46
    Moonset
    13:40

    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 windowWednesday, September 2
    Feeding windows on the day scale, local time0:0012:0024:00
    Major periodsMinor periods
    • Major04:21–06:21Moon overhead
    • Minor13:10–14:10Moonset
    • Major16:48–18:48Moon underfoot
    • Minor21:16–22:16Moonrise

    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

    • Blackwater2 mi
    • Owentaraglin5 mi
    • Brogeen River6 mi
    • Yellow6 mi
    • Beheenagh7 mi
    • Quagmire7 mi
    • Foherish River8 mi
    • Owenkeel River9 mi
    • Bohill River9 mi
    • Owneykeagh9 mi

    Nearby water bodies

    • LakeGartavehy Lough3 mi
    • LakeKippagh Lough4 mi
    • LakeCoomeenatrush Lake5 mi
    • LakeGlannafreaghaun Lough6 mi
    • LakeLough Nageeha7 mi
    • LakeLough Gal7 mi
    • LakeLough Carrignamork7 mi
    • LakeLough Carrignafurark8 mi