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Forecast
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© 2026·AI-powered bite forecast
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Ireland / County Donegal / Tullaghobegly River

Bite forecast: Tullaghobegly River

  • length 18 km
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Best fishing days for the next week

  1. TuesdaySeptember 8weather-based forecast
    61/100high activity

    Partly cloudy: 11–13 °C

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Nearby rivers

  • Ray River2 mi
  • Gleanna River2 mi
  • Glenna River2 mi
  • Owentully3 mi

Nearby water bodies

  • LakeLough Muilt2 mi
  • LakeCashelnagor Lough2 mi
  • LakeLough Agannive3 mi
  • LakeLough Feane3 mi
  • LakeLough Aluirg3 mi
  • LakeLough Altan3 mi
  • LakeLough Keel3 mi
  • LakeLough Agrougha3 mi
  • LakeDerryreel Lough4 mi
  • LakeLough Lagha4 mi

Tullaghobegly River (County Donegal) — a spot well known among anglers. About 18 km long. Nearby towns: Falcarragh and Dunfanaghy. See when the bite is best: hourly fish activity for the days ahead, computed from the weather, pressure, and season.

ThursdaySeptember 3weather-based forecast
56/100medium activity

Cloudy: 13–17 °C

  • WednesdaySeptember 2weather-based forecast
    54/100medium activity

    Cloudy: 13–18 °C

  • Nearby towns

    • Falcarragh0.4 mi
    • Dunfanaghy7 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?
    European eelPikeAtlantic salmonBreamBrown troutCarpPerchRainbow 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 — 06:00–08:00 (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 14 °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 °C14 °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 6 hPa over the day — fish are usually more active ahead of a weather change.

    Pressure through the day, 6 hPa change
    00:00 · 101523:00 · 1009 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°

    Cloudy · feels like +16°

    Low / high
    +13°…+18°
    Precipitation
    0.0 mm
    Wind
    9 mph SE
    Cloud cover
    100%
    Humidity
    92%
    Pressure
    1010 hPa
    00:00+14°—5 mphsouth wind, 5 mph94%92%
    01:00+14°—5 mphsouth wind, 5 mph95%100%
    02:00+14°—5 mphsouth wind, 5 mph95%100%
    03:00+14°—7 mphsouth wind, 7 mph94%99%
    04:00+14°—3 mphsoutheast wind, 3 mph94%100%
    05:00+13°—5 mphsoutheast wind, 5 mph96%100%
    06:00+13°—5 mphsoutheast wind, 5 mph96%100%
    07:00+14°0.2 mm5 mphsoutheast wind, 5 mph97%100%
    08:00+14°1.1 mm6 mpheast wind, 6 mph98%100%
    09:00+14°0.6 mm7 mphsoutheast wind, 7 mph97%100%
    10:00+15°—8 mphsoutheast wind, 8 mph96%100%
    11:00+16°—10 mphsoutheast wind, 10 mph94%100%
    12:00+16°—9 mphsoutheast wind, 9 mph92%100%
    13:00+16°1.5 mm7 mphsoutheast wind, 7 mph96%100%
    14:00+16°2.2 mm6 mphsouth wind, 6 mph96%100%
    15:00+18°0.2 mm9 mphsouthwest wind, 9 mph94%98%
    16:00+17°0.6 mm9 mphsouthwest wind, 9 mph96%100%
    17:00+16°0.1 mm10 mphsouthwest wind, 10 mph96%100%
    18:00+16°—10 mphsouthwest wind, 10 mph95%100%
    19:00+16°—9 mphsouthwest wind, 9 mph92%100%
    20:00+16°0.1 mm12 mphsouthwest wind, 12 mph96%100%
    21:00+16°0.5 mm11 mphsouthwest wind, 11 mph98%100%
    22:00+16°0.1 mm14 mphsouthwest wind, 14 mph97%100%
    23:00+16°0.2 mm10 mphsouthwest wind, 10 mph96%100%
    +18°+16°+13°
    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
    20:22
    Day length
    13 h 42 min
    Sunshine hours
    0 min
    UV index
    2
    low
    Moon
    Waning gibbous
    Moonrise
    21:24
    Moonset
    13:52

    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
    • Major04:16–06:16Moon overhead
    • Minor13:22–14:22Moonset
    • Major16:44–18:44Moon underfoot
    • Minor20:54–21:54Moonrise

    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?