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Forecast
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© 2026·AI-powered bite forecast
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Ireland / County Waterford / John's River

Bite forecast: John's River

  • length 9 km
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Best fishing days for the next week

  1. WednesdaySeptember 2weather-based forecast
    57/100medium activity

    Cloudy: 17–20 °C

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John's River (County Waterford) — a spot well known among anglers. About 9 km long. Close by — Waterford, Tramore and Portlaw. 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
56/100medium activity

Drizzle: 12–18 °C

  • ThursdaySeptember 3weather-based forecast
    54/100medium activity

    Partly cloudy: 14–19 °C

  • Nearby towns

    • Waterford0.3 mi
    • Tramore6 mi
    • Portlaw9 mi

    Bite calendar

    Aug 31 – Sep 6
    Mon
    Tue
    Wed
    Thu
    Fri
    Sat
    Sun
    Bite activity:highmediumlowslow
    Based on:weatherseasonal
    What is a bite calendar?
    European eelPikePerchAtlantic salmonBreamCarpRainbow troutBrown 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. Weather is steady, with no sharp swings — fish behave predictably.

    Peak bite hours

    Best time — 06:00–08:00 (dawn 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

    An average day — best chances during peak windows.

    How this forecast is calculated

    Why this forecast

    The computed water temperature is around 16 °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 °C16 °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 7 hPa over the day — fish are usually more active ahead of a weather change.

    Pressure through the day, 7 hPa change
    00:00 · 101623:00 · 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

    3 SepThursday, September 3
    +19°

    Partly cloudy · feels like +18°

    Low / high
    +13°…+19°
    Precipitation
    0.0 mm
    Wind
    16 mph SSW
    Cloud cover
    62%
    Humidity
    86%
    Pressure
    1016 hPa
    00:00+16°—6 mphwest wind, 6 mph95%52%
    01:00+15°—5 mphwest wind, 5 mph96%26%
    02:00+15°—4 mphsouthwest wind, 4 mph96%66%
    03:00+13°—2 mphwest wind, 2 mph98%50%
    04:00+14°—3 mphsouthwest wind, 3 mph97%59%
    05:00+14°—2 mphnortheast wind, 2 mph97%100%
    06:00+15°—2 mphnorth wind, 2 mph95%100%
    07:00+14°—2 mphsouth wind, 2 mph95%100%
    08:00+16°—6 mphsouth wind, 6 mph94%100%
    09:00+17°—6 mphsouthwest wind, 6 mph89%100%
    10:00+17°—7 mphsouth wind, 7 mph89%100%
    11:00+18°—13 mphsouthwest wind, 13 mph89%100%
    12:00+19°—16 mphsouthwest wind, 16 mph86%62%
    13:00+19°—17 mphsouthwest wind, 17 mph87%82%
    14:00+19°—19 mphsouthwest wind, 19 mph86%78%
    15:00+19°—19 mphsouthwest wind, 19 mph84%81%
    16:00+18°—17 mphsouthwest wind, 17 mph86%100%
    17:00+18°—16 mphsouthwest wind, 16 mph92%100%
    18:00+17°—15 mphsouthwest wind, 15 mph97%100%
    19:00+17°0.2 mm17 mphsouth wind, 17 mph99%100%
    20:00+18°0.1 mm24 mphsouthwest wind, 24 mph98%100%
    21:00+19°0.1 mm24 mphsouthwest wind, 24 mph96%100%
    22:00+19°0.1 mm20 mphsouthwest wind, 20 mph96%100%
    23:00+19°0.1 mm16 mphsouthwest wind, 16 mph95%100%
    +19°+16°+13°
    Weather throughout the day
    0:006:0012:0018:0023:00

    Sun and moon

    Thursday, September 3
    The day: daylight and the hours the moon is above the horizon. Local time0:0012:0024:00
    DaylightMoon above the horizon
    Sunrise
    06:44
    Sunset
    20:12
    Day length
    13 h 28 min
    Sunshine hours
    2 h 41 min
    UV index
    3
    moderate
    Moon
    Last quarter
    Moonrise
    22:09
    Moonset
    14:58

    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 windowThursday, September 3
    Feeding windows on the day scale, local time0:0012:0024:00
    Major periodsMinor periods
    • Major05:08–07:08Moon overhead
    • Minor14:28–15:28Moonset
    • Major17:37–19:37Moon underfoot
    • Minor21:39–22:39Moonrise

    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

    • King's Channel2 mi
    • Ballycanvan Stream3 mi
    • Woodland Pill3 mi
    • Suir5 mi
    • Portnascully River5 mi
    • Keiloge River5 mi
    • Whelanbridge River7 mi
    • Glendudda7 mi
    • Campile7 mi
    • Glendonnel8 mi

    Nearby water bodies

    • LakeLough Cullen4 mi
    • LakeBelle Lake6 mi
    • ReservoirBallyscanlan Lake7 mi
    • ReservoirCarrigavantry Lake7 mi
    • ReservoirKnockaderry Reservoir8 mi
    • ReservoirKnockaderry Reservoir8 mi
    • BayWaterford Harbour9 mi