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Where to fish

  • Forecast
  • Catches

Mine

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Forecast
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© 2026·AI-powered bite forecast
0.1.0+2161 · b4069346

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United Kingdom / Powys / River Usk

Bite forecast: River Usk

  • length 67 km
  • Flows into Bristol Channel
Loading map…

Best fishing days for the next week

  1. TuesdaySeptember 8weather-based forecast
    64/100high activity

    Cloudy: 10–17 °C

Loading map…

River Usk (Powys) — a popular fishing spot. About 67 km long. Flows into Bristol Channel. Nearest town — Llanwrtyd Wells. See when the bite is best: hourly fish activity for the days ahead, computed from the weather, pressure, and season.

Fish biting at this waterbody

Choose a fish to see its hourly forecast, catches and BiteGuide.

  • Brown trout

Catches

Recorded 18 catches here. Most commonly caught: Brown trout. Peak season: April–July.

  • Brown trout
    River Usk
    14 °C9 mph
    Apr 14, 2022, 6:10 PM
  • Brown trout
    River Usk
    17 °C9 mph
    Jul 31, 2021, 3:58 PM
  • Brown trout
    River Usk
    18 °C0 mph
    Jul 10, 2021, 5:28 PM
  • Brown trout
    River Usk
    20 °C4 mph
    Jun 30, 2021, 8:42 PM
  • Brown trout
    River Usk
    10 °C2 mph
    May 01, 2021, 5:39 PM
  • Brown trout
    River Usk
    15 °C16 mph
    Jul 06, 2020, 1:31 PM
  • Brown trout
    River Usk
    22 °C9 mph
    Aug 24, 2019, 12:28 PM
  • Brown trout
    River Usk
    15 °C16 mph
    Sep 29, 2017, 5:41 PM

Nearby rivers

  • Afon Hydfer3 mi
  • Cilieni4 mi
  • Afon Senni4 mi
  • River Usk4 mi
  • Nant Brân6 mi
  • Afon Twrch7 mi
  • Afon Gwydderig7 mi
  • Afon Tarell7 mi
  • River Tarell7 mi
  • Afon Ysgir8 mi

Nearby water bodies

  • ReservoirUsk Reservoir4 mi
  • ReservoirCrai Reservoir4 mi
  • LakeLlyn y Fan Fawr5 mi
  • ReservoirLlyn y Fan Fach6 mi
  • ReservoirYstradfellte Reservoir8 mi
  • LakeLlyn Gludy9 mi
SundaySeptember 6weather-based forecast
62/100high activity

Cloudy: 15–19 °C

  • ThursdaySeptember 3weather-based forecast
    59/100medium activity

    Cloudy: 15–19 °C

  • Nearby towns

    • Llanwrtyd Wells11 mi

    Bite calendar

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

    In the fish list, this icon marks species recorded here by GBIF. Unmarked species may still occur in the waterbody.

    European eelPikeWhitefishBarbelWels catfishDaceGraylingRuffeZanderAtlantic salmonBreamBrown troutCarpPerchRainbow troutChubIdeCrucian carpRoachWhite breamBleakRuddTench

    Atlantic salmon

    7/10 · Good

    Occurs in this waterbody — confirmed by observations. Source: GBIF

    Hourly activity

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

    The bite is strong — fish are active. Pressure is dropping — this usually boosts the bite.

    Peak bite hours

    Best time — 06:00–08:00 (dawn bite) and 19:00–21:00 (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. 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 14 °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 °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 33 hPa over the day — fish are usually more active ahead of a weather change.

    Pressure through the day, 33 hPa change
    00:00 · 101923:00 · 986 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

    8 SepTuesday, September 8
    +14°

    Cloudy · feels like +10°

    Low / high
    +10°…+17°
    Precipitation
    0.5 mm
    Wind
    15 mph SW
    Cloud cover
    100%
    Humidity
    79%
    Pressure
    1013 hPa
    00:00+12°0.4 mm12 mphwest wind, 12 mph93%100%
    01:00+12°0.4 mm11 mphwest wind, 11 mph93%100%
    02:00+12°—11 mphwest wind, 11 mph93%100%
    03:00+11°—10 mphwest wind, 10 mph93%100%
    04:00+11°—10 mphwest wind, 10 mph92%100%
    05:00+10°—9 mphwest wind, 9 mph92%100%
    06:00+10°—9 mphwest wind, 9 mph90%100%
    07:00+10°—9 mphwest wind, 9 mph88%100%
    08:00+11°—9 mphwest wind, 9 mph85%100%
    09:00+11°—9 mphwest wind, 9 mph80%100%
    10:00+12°—9 mphwest wind, 9 mph75%100%
    11:00+13°0.2 mm12 mphwest wind, 12 mph76%100%
    12:00+14°0.5 mm15 mphsouthwest wind, 15 mph79%100%
    13:00+14°0.7 mm19 mphsouthwest wind, 19 mph85%100%
    14:00+15°1.6 mm21 mphsouth wind, 21 mph93%100%
    15:00+15°1.6 mm21 mphsouth wind, 21 mph94%100%
    16:00+16°1.6 mm20 mphsouthwest wind, 20 mph95%100%
    17:00+16°1.6 mm19 mphsouthwest wind, 19 mph96%100%
    18:00+16°1.6 mm18 mphsouthwest wind, 18 mph97%99%
    19:00+17°1.6 mm17 mphsouthwest wind, 17 mph98%99%
    20:00+16°0.2 mm18 mphsouthwest wind, 18 mph98%98%
    21:00+16°0.2 mm19 mphsouthwest wind, 19 mph98%98%
    22:00+15°0.2 mm21 mphsouthwest wind, 21 mph98%97%
    23:00+14°0.2 mm22 mphsouthwest wind, 22 mph97%96%
    +17°+13°+10°
    Weather throughout the day
    0:006:0012:0018:0023:00

    Sun and moon

    Tuesday, September 8
    The day: daylight and the hours the moon is above the horizon. Local time0:0012:0024:00
    DaylightMoon above the horizon
    Sunrise
    06:36
    Sunset
    19:45
    Day length
    13 h 9 min
    Sunshine hours
    0 min
    UV index
    1
    low
    Moon
    Waning crescent
    Moonrise
    02:43
    Moonset
    18:50

    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 windowTuesday, September 8
    Feeding windows on the day scale, local time0:0012:0024:00
    Major periodsMinor periods
    • Minor02:13–03:13Moonrise
    • Major09:58–11:58Moon overhead
    • Minor18:20–19:20Moonset
    • Major22:25–00:00Moon 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?

    BiteGuide·From anglers’ reports

    What actually worked on this water

    Based on 18 verified catchesPeriod: 2012–2022

    This is a summary of anglers' reports, not a proven cause of the bite: conditions lining up does not mean they drove it.

    By month

    vertical axis — number of catches

    048
    823311
    AprMayJunJulAugSep
    By month
    ValueCatchesShare
    Apr844%
    May211%
    Jun317%
    Jul317%
    Aug16%
    Sep16%

    By time of day

    vertical axis — number of catches

    035
    35112312
    1314151617181921
    By time of day
    ValueCatchesShare
    13:00317%
    14:00528%
    15:0016%
    16:0016%
    17:00211%
    18:00317%
    19:0016%
    21:00211%

    Air temperature, °C

    vertical axis — number of catches

    048
    3852
    5101520
    Air temperature, °C
    ValueCatchesShare
    5–9 °C317%
    10–14 °C844%
    15–19 °C528%
    20–24 °C211%

    Pressure, mmHg

    vertical axis — number of catches

    036
    1665
    735745750755
    Pressure, mmHg
    ValueCatchesShare
    735–739 mmHg16%
    745–749 mmHg633%
    750–754 mmHg633%
    755–759 mmHg528%

    Wind direction

    17 catches have this data · vertical axis — number of catches

    024
    2113442
    NEESESSWWNW
    Wind direction
    ValueCatchesShare
    NE212%
    E16%
    SE16%
    S318%
    SW424%
    W424%
    NW212%

    Wind speed, mph

    vertical axis — number of catches

    0611
    22113
    04913
    Wind speed, mph
    ValueCatchesShare
    0–2 mph211%
    4–7 mph211%
    9–11 mph1161%
    13–16 mph317%