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Where to fish

  • Forecast
  • Catches

Mine

  • Favorites
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© 2026·AI-powered bite forecast
0.1.0+2163 · 92c14a40

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Canada / Ontario / Thessalon River

Bite forecast: Thessalon River

  • length 51 km
Loading map…

Best fishing days for the next week

  1. TuesdaySeptember 8weather-based forecast
    69/100high activity

    Drizzle: 9–13 °C

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Nearby water bodies

  • LakeOttertail Lake3 km
  • LakeBlack Creek4 km
  • LakeRose Lake5 km
  • LakeLeslie Lake7 km
  • LakeCaribou Lake8 km
  • LakeRound Lake9 km
  • LakeMcKinnon Creek;Randolph Lake9 km
  • LakeRock Lake9 km
  • LakeGordon Lake11 km
  • LakeGibboney Lake;Stobie Creek11 km

Thessalon River (Ontario) — one of the area's fishing spots. About 51 km long. A smart bite calendar — moon phase, atmospheric pressure, and weather combined into an hourly fish-activity forecast for the coming days.

Catches

Recorded 1 catch here. Most commonly caught: Rainbow smelt. Peak season: April.

  • Rainbow smelt — Thessalon River, Apr 23, 2025, 1:21 AM
    Rainbow smelt
    Thessalon River
    Apr 23, 2025, 1:21 AM
WednesdaySeptember 9weather-based forecast
67/100high activity

Cloudy: 15–21 °C

  • SundaySeptember 6weather-based forecast
    63/100high activity

    Partly cloudy: 13–25 °C

  • Bite calendar

    Thursday, September 3

    Aug 31 – Sep 6
    Mon
    Tue
    Wed
    Thu
    Fri
    Sat
    Sun
    Bite activity:highmediumlowslow
    Based on:weatherseasonal
    What is a bite calendar?
    CarpBrook troutChannel catfishCoho salmonLake sturgeonLargemouth bassYellow perchBrown troutMuskellungePikeSaugerSmallmouth bassSteelheadWalleyeWhitefishAtlantic salmonChinook salmonRainbow troutBlack crappieLake troutBurbotRainbow smelt

    Atlantic salmon

    5/10 · Fair

    Hourly activity

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

    The bite is moderate — fish feed in short bursts. Pressure is dropping — this usually boosts the bite.

    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

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

    Gear

    No special gear needed — seasonal clothing will do.

    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 rising 4 hPa over the day — the bite usually settles down after a rise.

    Pressure through the day, 4 hPa change
    00:00 · 101023:00 · 1014 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
    +16°

    Cloudy · feels like +16°

    Low / high
    +15°…+19°
    Precipitation
    0.0 mm
    Wind
    3 m/s NW
    Cloud cover
    100%
    Humidity
    92%
    Pressure
    1012 hPa
    00:00+16°—2 m/swest wind, 2 m/s90%57%
    01:00+15°—2 m/snorth wind, 2 m/s90%100%
    02:00+16°—2 m/snorthwest wind, 2 m/s92%89%
    03:00+15°—2 m/snorthwest wind, 2 m/s93%39%
    04:00+15°—2 m/snorthwest wind, 2 m/s95%57%
    05:00+15°—1 m/swest wind, 1 m/s96%39%
    06:00+15°—2 m/snorthwest wind, 2 m/s97%100%
    07:00+15°—2 m/swest wind, 2 m/s96%100%
    08:00+16°—2 m/swest wind, 2 m/s95%100%
    09:00+16°—3 m/swest wind, 3 m/s94%100%
    10:00+16°—3 m/snorthwest wind, 3 m/s96%100%
    11:00+16°—3 m/snorthwest wind, 3 m/s93%100%
    12:00+16°—3 m/snorthwest wind, 3 m/s92%100%
    13:00+16°—3 m/snorthwest wind, 3 m/s92%100%
    14:00+16°—3 m/snorthwest wind, 3 m/s92%100%
    15:00+17°—3 m/snorthwest wind, 3 m/s91%100%
    16:00+18°—3 m/snorthwest wind, 3 m/s85%100%
    17:00+18°—3 m/snorthwest wind, 3 m/s84%96%
    18:00+19°—3 m/snorthwest wind, 3 m/s81%66%
    19:00+18°—3 m/snorthwest wind, 3 m/s82%57%
    20:00+17°—2 m/swest wind, 2 m/s87%100%
    21:00+17°—2 m/snorthwest wind, 2 m/s89%100%
    22:00+17°—2 m/snorthwest wind, 2 m/s89%100%
    23:00+16°—2 m/snorthwest wind, 2 m/s89%72%
    +19°+17°+15°
    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
    06:46
    Sunset
    20:09
    Day length
    13 h 23 min
    Sunshine hours
    50 min
    UV index
    1
    low
    Moon
    Last quarter
    Moonrise
    23:02
    Moonset
    14:49

    The day is 3 min shorter than yesterday.

    Sunshine hours count direct sun only — cloud cover cuts it, so it is shorter than daylight.

    Solunar feeding periods

    +15% in the windowThursday, September 3
    Feeding windows on the day scale, local time0:0012:0024:00
    Major periodsMinor periods
    • Major05:28–07:28Moon overhead
    • Minor14:19–15:19Moonset
    • Major17:58–19:58Moon underfoot
    • Minor22:32–23:32Moonrise

    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?

    Measured river conditions are available for Thessalon River: current gauge height, streamflow, and water temperature when reported by the source.

    Water

    Streamflow
    1.7 m³/s

    USGS gauge THESSALON RIVER NEAR POPLAR DALE, 19 km away · measured 2026-09-02 23:15 · data source · provisional data, subject to revision