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Ireland / County Leitrim / Diffreen River

Bite forecast: Diffreen River

  • length 9 km
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Best fishing days for the next week

  1. MondaySeptember 7weather-based forecast
    61/100high activity

    Cloudy: 12–16 °C

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Diffreen River (County Leitrim) — one of the area's fishing spots. About 9 km long. Nearest town — Manorhamilton. See when the bite is best: hourly fish activity for the days ahead, computed from the weather, pressure, and season.

WednesdaySeptember 9weather-based forecast
59/100medium activity

Partly cloudy: 11–16 °C

  • ThursdaySeptember 10weather-based forecast
    58/100medium activity

    Drizzle: 11–13 °C

  • Nearby towns

    • Manorhamilton6 mi

    Bite calendar

    7–Sep 13
    Mon
    Tue
    Wed
    Thu
    Fri
    Sat
    Sun
    Bite activity:highmediumlowslow
    Based on:weatherseasonal
    What is a bite calendar?
    European eelPikeAtlantic salmonBreamCarpPerchRainbow troutBrown troutRoachBleakRuddTenchWhite bream

    Atlantic salmon

    7/10 · Good

    Hourly activity

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

    The bite is strong — fish are active. 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

    Pack transitional-season clothing — mornings and evenings are chilly. A thunderstorm is possible — bring a rain jacket, and pack up at the first rumble of thunder.

    Summary

    Worth going — it's a productive day.

    How this forecast is calculated

    Why this forecast

    The computed water temperature is around 13 °C — inside the 4–14 °C comfort range for Atlantic salmon, so baseline activity is high.

    Computed water temperature by month; the green band is the 4–14 °C comfort rangecomfort 4–14 °C13 °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 3 hPa over the day — fish are usually more active ahead of a weather change.

    Pressure through the day, 3 hPa change
    00:00 · 101223:00 · 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

    7 SepMonday, September 7
    +15°

    Cloudy · feels like +11°

    Low / high
    +10°…+16°
    Precipitation
    0.0 mm
    Wind
    14 mph SW
    Cloud cover
    82%
    Humidity
    65%
    Pressure
    1014 hPa
    00:00+13°—10 mphwest wind, 10 mph88%96%
    01:00+13°—10 mphwest wind, 10 mph87%95%
    02:00+12°—10 mphwest wind, 10 mph87%96%
    03:00+12°—10 mphwest wind, 10 mph89%98%
    04:00+12°—10 mphsouthwest wind, 10 mph90%100%
    05:00+12°—10 mphsouthwest wind, 10 mph91%100%
    06:00+12°—9 mphsouthwest wind, 9 mph92%100%
    07:00+12°—9 mphsouthwest wind, 9 mph91%98%
    08:00+12°—9 mphsouthwest wind, 9 mph87%82%
    09:00+12°—8 mphsouthwest wind, 8 mph82%61%
    10:00+13°—9 mphsouthwest wind, 9 mph77%50%
    11:00+14°—11 mphsouthwest wind, 11 mph71%61%
    12:00+15°—14 mphsouthwest wind, 14 mph65%82%
    13:00+16°—16 mphsouthwest wind, 16 mph63%98%
    14:00+16°0.2 mm18 mphsouthwest wind, 18 mph67%100%
    15:00+15°0.2 mm19 mphsouth wind, 19 mph75%100%
    16:00+14°0.2 mm19 mphsouth wind, 19 mph80%100%
    17:00+14°2.2 mm18 mphsouthwest wind, 18 mph81%74%
    18:00+13°2.2 mm16 mphsouthwest wind, 16 mph80%39%
    19:00+12°2.2 mm15 mphwest wind, 15 mph79%14%
    20:00+12°—15 mphsouthwest wind, 15 mph80%8%
    21:00+11°—15 mphsouthwest wind, 15 mph81%12%
    22:00+11°—15 mphsouthwest wind, 15 mph82%22%
    23:00+10°0.1 mm16 mphsouthwest wind, 16 mph83%39%
    +16°+13°+10°
    Weather throughout the day
    0:006:0012:0018:0023:00

    Sun and moon

    Monday, September 7
    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
    20:08
    Day length
    13 h 18 min
    Sunshine hours
    9 h
    UV index
    3
    moderate
    Moon
    Waning crescent
    Moonrise
    01:16
    Moonset
    18:56

    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 windowMonday, September 7
    Feeding windows on the day scale, local time0:0012:0024:00
    Major periodsMinor periods
    • Minor00:46–01:46Moonrise
    • Major09:18–11:18Moon overhead
    • Minor18:26–19:26Moonset
    • Major21:47–23:47Moon 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?

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