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Where to fish

  • Forecast
  • Catches

Mine

  • Favorites
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© 2026·AI-powered bite forecast
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United Kingdom / Suffolk / River Deben

Bite forecast: River Deben

  • length 58 km
  • Flows into River Orwell
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Best fishing days for the next week

  1. ThursdaySeptember 10weather-based forecast
    60/100high activity

    Cloudy: 11–18 °C

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Nearby rivers

  • Ore2 mi
  • River Alde4 mi
  • River Fromus5 mi
  • Butley River5 mi
  • Martlesham Creek6 mi
  • Stony Ditch8 mi
  • River Fynn9 mi

Nearby water bodies

  • LakeDecoy Pond0.1 mi
  • ReservoirHall Farm Reservoir3 mi
  • ReservoirLime Tree Farm Reservoir3 mi
  • ReservoirLime Tree Farm Reservoir No. 23 mi
  • ReservoirPond Barn Reservoir4 mi
  • LakeThe Mere6 mi
  • LakeFriston Hall Lake6 mi
  • ReservoirLodge Farm Reservoir7 mi
  • LakeReservoir7 mi
  • LakeReservoir7 mi

River Deben (Suffolk) — one of the area's fishing spots. About 58 km long. Flows into River Orwell. The town of Stowmarket is nearby. Here you'll find a bite prediction — when fish are active and which hours give the best chances, adjusted for weather and pressure.

SaturdaySeptember 12weather-based forecast
59/100medium activity

Cloudy: 11–20 °C

  • TuesdaySeptember 8weather-based forecast
    58/100medium activity

    Cloudy: 14–19 °C

  • Nearby towns

    • Stowmarket8 mi

    Bite calendar

    Sunday, September 6

    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 19:00–21:00 (dusk bite).

    Tactics

    Work the cover — snags, weed edges, hole entrances; retrieve the lure with pauses.

    Lures

    In clear water, natural colors work best: salmon spoon or salmon fly.

    Gear

    No special gear needed — seasonal clothing will do.

    Summary

    Worth going — it's a productive day.

    How this forecast is calculated

    Why this forecast

    The computed water temperature is around 17 °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 °C17 °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 8 hPa over the day — fish are usually more active ahead of a weather change.

    Pressure through the day, 8 hPa change
    00:00 · 102623:00 · 1018 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

    6 SepSunday, September 6
    +21°

    Cloudy · feels like +19°

    Low / high
    +12°…+24°
    Precipitation
    0.0 mm
    Wind
    11 mph S
    Cloud cover
    100%
    Humidity
    51%
    Pressure
    1023 hPa
    00:00+13°—5 mphsoutheast wind, 5 mph80%0%
    01:00+13°—5 mphsoutheast wind, 5 mph82%100%
    02:00+12°—5 mphsoutheast wind, 5 mph81%31%
    03:00+13°—5 mphsoutheast wind, 5 mph78%100%
    04:00+12°—5 mphsouth wind, 5 mph81%15%
    05:00+13°—7 mphsouth wind, 7 mph83%0%
    06:00+13°—6 mphsouth wind, 6 mph94%6%
    07:00+14°—7 mphsouth wind, 7 mph88%100%
    08:00+16°—9 mphsouth wind, 9 mph76%100%
    09:00+18°—10 mphsouth wind, 10 mph73%51%
    10:00+19°—9 mphsouth wind, 9 mph67%75%
    11:00+19°—9 mphsouth wind, 9 mph61%100%
    12:00+21°—11 mphsouth wind, 11 mph51%100%
    13:00+22°—12 mphsouth wind, 12 mph47%0%
    14:00+22°—13 mphsouth wind, 13 mph44%100%
    15:00+23°—12 mphsouth wind, 12 mph45%94%
    16:00+24°—13 mphsouth wind, 13 mph42%0%
    17:00+24°—14 mphsouth wind, 14 mph42%0%
    18:00+23°—13 mphsouth wind, 13 mph45%0%
    19:00+21°—11 mphsouth wind, 11 mph55%0%
    20:00+19°—10 mphsouth wind, 10 mph62%0%
    21:00+19°—10 mphsouth wind, 10 mph64%0%
    22:00+17°—7 mphsouth wind, 7 mph71%0%
    23:00+17°—7 mphsouth wind, 7 mph76%94%
    +24°+18°+12°
    Weather throughout the day
    0:006:0012:0018:0023:00

    Sun and moon

    Sunday, September 6
    The day: daylight and the hours the moon is above the horizon. Local time0:0012:0024:00
    DaylightMoon above the horizon
    Sunrise
    06:15
    Sunset
    19:32
    Day length
    13 h 17 min
    Sunshine hours
    10 h 28 min
    UV index
    4
    moderate
    Moon
    Waning crescent
    Moonrise
    —
    Moonset
    17:36

    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

    +12% in the windowSunday, September 6
    Feeding windows on the day scale, local time0:0012:0024:00
    Major periodsMinor periods
    • Major07:39–09:39Moon overhead
    • Minor17:06–18:06Moonset
    • Major20:10–22:10Moon 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?