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Where to fish

  • Forecast
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Forecast
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© 2026·AI-powered bite forecast
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United Kingdom / Swansea / Morlais River

Bite forecast: Morlais River

  • length 6 km
Loading map…

Best fishing days for the next week

  1. WednesdaySeptember 2weather-based forecast
    55/100medium activity

    Cloudy: 16–19 °C

Loading map…

Morlais River (Swansea) — a popular fishing spot. About 6 km long. Nearest town — Swansea. See when the bite is best: hourly fish activity for the days ahead, computed from the weather, pressure, and season.

Catches

Recorded 15 catches here. Most commonly caught: Bream, Carp, Crucian carp. Peak season: January–July.

  • Carp
    Morlais River
    4 °C4 mph
    Jan 10, 2019, 11:09 AM
  • Carp
    Morlais River
    4 °C4 mph
    Jan 10, 2019, 11:06 AM
  • Carp
    Morlais River
    4 °C4 mph
    Jan 10, 2019, 11:00 AM
  • Carp
    Morlais River
    4 °C4 mph
    Jan 10, 2019, 10:58 AM
  • Bream
    Morlais River
    4 °C4 mph
    Jan 10, 2019, 10:40 AM
  • Bream
    Morlais River
    4 °C4 mph
    Jan 10, 2019
  • Bream
    Morlais River
    4 °C4 mph
    Jan 10, 2019
  • Bream
    Morlais River
    4 °C4 mph
    Jan 10, 2019

Nearby rivers

  • New Dafen River3 mi
  • River Llan6 mi
  • River Lliw6 mi
  • River Lliedi7 mi
  • River Loughor7 mi

Nearby water bodies

  • LakeEastern Scrapes2 mi
  • LakeDeep Water Lake2 mi
  • PondDafen Scrapes3 mi
  • PondLagoon3 mi
  • LakeBroad Pool3 mi
  • LakeDelta Lakes3 mi
  • LakeNorth Dock4 mi
  • PondPont Twym4 mi
  • PondSandy Water Park4 mi
  • ReservoirTre-Beddrod Reservoir5 mi
ThursdaySeptember 3weather-based forecast
52/100medium activity

Cloudy: 17–20 °C

  • SundaySeptember 6weather-based forecast
    51/100medium activity

    Drizzle: 16–19 °C

  • Nearby towns

    • Swansea6 mi

    BiteGuide·From anglers’ reports

    What actually worked on this water

    Based on 15 verified catchesPeriod: 2013–2019

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

    By fish species

    vertical axis — number of catches

    047
    74211
    BreamCarpCrucian carpPerchRudd
    By fish species
    ValueCatchesShare
    Bream747%
    Carp427%
    Crucian carp213%
    Perch17%
    Rudd17%

    By month

    vertical axis — number of catches

    059
    9123
    JanAprJunJul
    By month
    ValueCatchesShare
    Jan960%
    Apr17%
    Jun213%
    Jul320%

    By time of day

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

    023
    331112
    101115161821
    By time of day
    ValueCatchesShare
    10:00327%
    11:00327%
    15:0019%
    16:0019%
    18:0019%
    21:00218%

    Air temperature, °C

    vertical axis — number of catches

    059
    9231
    0101520
    Air temperature, °C
    ValueCatchesShare
    0–4 °C960%
    10–14 °C213%
    15–19 °C320%
    20–24 °C17%

    Pressure, mmHg

    vertical axis — number of catches

    059
    11319
    740745750760765
    Pressure, mmHg
    ValueCatchesShare
    740–744 mmHg17%
    745–749 mmHg17%
    750–754 mmHg320%
    760–764 mmHg17%
    765–769 mmHg960%

    Wind direction

    vertical axis — number of catches

    0510
    1111110
    NEESSWWNW
    Wind direction
    ValueCatchesShare
    NE17%
    E17%
    S17%
    SW17%
    W17%
    NW1067%

    Wind speed, mph

    vertical axis — number of catches

    0611
    11112
    491318
    Wind speed, mph
    ValueCatchesShare
    4–7 mph1173%
    9–11 mph17%
    13–16 mph17%
    18–20 mph213%

    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?
    DaceEuropean eelGraylingPikeBarbelRuffeWhitefishZanderPerchAtlantic salmonBreamCarpRainbow troutBrown troutWels catfishIdeRoachBleakChubCrucian carpWhite breamRuddTench

    Atlantic salmon

    6/10 · Fair

    Hourly activity

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

    The bite is strong — fish are active. Pressure is rising — activity tends to be more subdued.

    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. 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 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 3 hPa over the day — fish are usually more active ahead of a weather change.

    Pressure through the day, 3 hPa change
    00:00 · 102023:00 · 1017 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
    +18°

    Cloudy · feels like +17°

    Low / high
    +15°…+19°
    Precipitation
    0.0 mm
    Wind
    15 mph SW
    Cloud cover
    100%
    Humidity
    91%
    Pressure
    1016 hPa
    00:00+15°—5 mphsouthwest wind, 5 mph96%100%
    01:00+15°0.9 mm3 mphsouthwest wind, 3 mph97%100%
    02:00+15°—5 mphsouthwest wind, 5 mph95%100%
    03:00+15°0.3 mm5 mphsouthwest wind, 5 mph95%100%
    04:00+16°1.1 mm9 mphsouthwest wind, 9 mph92%100%
    05:00+16°—9 mphsouthwest wind, 9 mph92%99%
    06:00+16°0.1 mm9 mphsouth wind, 9 mph90%100%
    07:00+16°—9 mphsouth wind, 9 mph89%100%
    08:00+16°0.5 mm12 mphsouth wind, 12 mph93%100%
    09:00+16°1.2 mm14 mphsouth wind, 14 mph95%100%
    10:00+17°0.6 mm14 mphsouthwest wind, 14 mph95%100%
    11:00+17°0.3 mm15 mphsouthwest wind, 15 mph93%100%
    12:00+18°—15 mphsouthwest wind, 15 mph91%100%
    13:00+18°0.1 mm15 mphsouthwest wind, 15 mph90%98%
    14:00+18°—14 mphsouthwest wind, 14 mph89%100%
    15:00+19°0.2 mm14 mphsouthwest wind, 14 mph91%98%
    16:00+19°—13 mphsouthwest wind, 13 mph88%95%
    17:00+18°—14 mphsouthwest wind, 14 mph88%98%
    18:00+18°—13 mphsouthwest wind, 13 mph87%96%
    19:00+18°—13 mphsouthwest wind, 13 mph87%84%
    20:00+18°—11 mphsouthwest wind, 11 mph88%98%
    21:00+18°—11 mphsouthwest wind, 11 mph89%100%
    22:00+18°—10 mphsouthwest wind, 10 mph90%100%
    23:00+18°—11 mphsouthwest wind, 11 mph92%100%
    +19°+17°+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
    06:30
    Sunset
    20:00
    Day length
    13 h 30 min
    Sunshine hours
    0 min
    UV index
    1
    low
    Moon
    Waning gibbous
    Moonrise
    21:25
    Moonset
    13:18

    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
    • Major04:00–06:00Moon overhead
    • Minor12:48–13:48Moonset
    • Major16:27–18:27Moon underfoot
    • Minor20:55–21:55Moonrise

    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?