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Where to fish

  • Forecast
  • Catches

Mine

  • Favorites
ForecastCatchesFavorites
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© 2026·AI-powered bite forecast
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Canada / Alberta / Oldman River

Bite forecast: Oldman River

  • length 443 km
  • Flows into South Saskatchewan River, Lake Winnipeg basin
Loading map…

Best fishing days for the next week

  1. ThursdaySeptember 10weather-based forecast
    66/100high activity

    Partly cloudy: 5–13 °C

Oldman River (Alberta) — one of the area's fishing spots. About 443 km long. Flows into South Saskatchewan River, Lake Winnipeg basin. Nearest town — Lethbridge. See when the bite is best: hourly fish activity for the days ahead, computed from the weather, pressure, and season.

WednesdaySeptember 9weather-based forecast
64/100high activity

Partly cloudy: 3–14 °C

  • MondaySeptember 7weather-based forecast
    60/100high activity

    Partly cloudy: 1–13 °C

  • Nearby towns

    • Lethbridge2 km

    Nearby water bodies

    • ReservoirOldman River Reservoir8 km
    Loading map…

    Catches

    Recorded 5 catches here. Most commonly caught: Rainbow trout, Cutthroat trout, Mountain whitefish. Peak season: July–October.

    • Rainbow trout — Oldman River, Sep 19, 2022, 11:46 AM
      Rainbow trout
      Oldman River
      Sep 19, 2022, 11:46 AM
    • Mountain whitefish — Oldman River, Sep 19, 2022, 11:43 AM
      Mountain whitefish
      Oldman River
      Sep 19, 2022, 11:43 AM
    • Cutthroat trout — Oldman River, Sep 18, 2022, 5:13 PM
      Cutthroat trout
      Oldman River
      Sep 18, 2022, 5:13 PM
    • Cutthroat trout — Oldman River, Jul 09, 2022, 12:51 PM
      Cutthroat trout
      Oldman River
      Jul 09, 2022, 12:51 PM
    • Rainbow trout — Oldman River, Oct 26, 2018, 2:50 PM
      Rainbow trout
      Oldman River
      Oct 26, 2018, 2:50 PM

    Bite calendar

    Aug 31 – Sep 6
    Mon
    Tue
    Wed
    Thu
    Fri
    Sat
    Sun
    Bite activity:highmediumlowslow
    Based on:weatherseasonal
    What is a bite calendar?
    Brown troutBrook troutBull troutGraylingMountain whitefishWhitefishCutthroat troutLake sturgeonPikeRainbow troutSaugerWalleyeYellow perchGoldeyeLake troutBurbot

    Brook trout

    6/10 · Fair

    Hourly activity

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

    The bite is moderate — fish feed in short bursts. Pressure is rising — activity tends to be more subdued.

    Peak bite hours

    Best time — 07:00–09:00 (dawn bite) and 20:00–22:00 (dusk bite).

    Tactics

    Work the cover — snags, weed edges, hole entrances; retrieve the lure with pauses. The water's cold — fish it more delicately and slowly.

    Lures

    The water's turning murky — go with bright, noisy lures: spinner or fly. The water's cold — work the lure slower than usual.

    Gear

    Bring a warm jacket — it's noticeably colder on the water than on shore. 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 7 °C — colder than the 7–16 °C comfort range for Brook trout: the fish conserves energy and takes more cautiously.

    Computed water temperature by month; the green band is the 7–16 °C comfort rangecomfort 7–16 °C7 °C
    JFMAMJJASOND

    Brook trout 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 Brook trout feeds0:0012:0024:00

    Pressure is rising 6 hPa over the day — the bite usually settles down after a rise.

    Pressure through the day, 6 hPa change
    00:00 · 101623:00 · 1022 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 Brook trout here.

    JFMAMJJASOND

    These are the same values the bite curve above was computed from. How the forecast works

    5 SepSaturday, September 5
    +5°

    Partly cloudy · feels like +2°

    Low / high
    +1°…+6°
    Precipitation
    0.0 mm
    Wind
    2 m/s SSE
    Cloud cover
    38%
    Humidity
    81%
    Pressure
    1019 hPa
    00:00+2°—1 m/ssouthwest wind, 1 m/s95%100%
    01:00+2°—1 m/ssouthwest wind, 1 m/s95%88%
    02:00+2°—1 m/ssouthwest wind, 1 m/s96%100%
    03:00+1°—1 m/swest wind, 1 m/s94%68%
    04:00+1°—1 m/swest wind, 1 m/s92%80%
    05:00+1°—1 m/ssouthwest wind, 1 m/s95%100%
    06:00+1°—1 m/ssouthwest wind, 1 m/s95%100%
    07:00+1°—1 m/ssouthwest wind, 1 m/s94%100%
    08:00+2°—0 m/swest wind, 0 m/s93%100%
    09:00+2°—1 m/snorth wind, 1 m/s90%93%
    10:00+3°—1 m/ssoutheast wind, 1 m/s87%47%
    11:00+4°—1 m/ssouth wind, 1 m/s84%27%
    12:00+5°—2 m/ssouth wind, 2 m/s81%38%
    13:00+5°—2 m/ssouth wind, 2 m/s78%39%
    14:00+5°—2 m/ssouthwest wind, 2 m/s76%37%
    15:00+6°—3 m/ssouthwest wind, 3 m/s73%30%
    16:00+5°0.2 mm2 m/ssouth wind, 2 m/s81%60%
    17:00+5°0.1 mm2 m/ssouth wind, 2 m/s86%77%
    18:00+4°0.3 mm2 m/ssouth wind, 2 m/s91%100%
    19:00+4°0.4 mm2 m/ssoutheast wind, 2 m/s92%100%
    20:00+4°0.6 mm2 m/ssouth wind, 2 m/s91%100%
    21:00+4°0.8 mm2 m/ssouth wind, 2 m/s94%100%
    22:00+4°0.6 mm1 m/ssouth wind, 1 m/s89%100%
    23:00+3°0.5 mm2 m/ssouthwest wind, 2 m/s89%100%
    +6°+3°+1°
    Weather throughout the day
    0:006:0012:0018:0023:00

    Sun and moon

    Saturday, September 5
    The day: daylight and the hours the moon is above the horizon. Local time0:0012:0024:00
    DaylightMoon above the horizon
    Sunrise
    07:04
    Sunset
    20:21
    Day length
    13 h 17 min
    Sunshine hours
    6 h 27 min
    UV index
    5
    moderate
    Moon
    Waning crescent
    Moonrise
    —
    Moonset
    17:32

    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

    +14% in the windowSaturday, September 5
    Feeding windows on the day scale, local time0:0012:0024:00
    Major periodsMinor periods
    • Major07:37–09:37Moon overhead
    • Minor17:02–18:02Moonset
    • Major20:08–22:08Moon 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 5 verified catchesPeriod: 2018–2022

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

    By fish species

    vertical axis — number of catches

    012
    221
    Cutthroat troutRainbow troutMountain whitefish
    By fish species
    ValueCatchesShare
    Cutthroat trout240%
    Rainbow trout240%
    Mountain whitefish120%

    By month

    vertical axis — number of catches

    023
    131
    JulSepOct
    By month
    ValueCatchesShare
    Jul120%
    Sep360%
    Oct120%

    By time of day

    vertical axis — number of catches

    012
    2111
    56811
    By time of day
    ValueCatchesShare
    05:00240%
    06:00120%
    08:00120%
    11:00120%