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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

Clear: 3–14 °C

  • SundaySeptember 6weather-based forecast
    57/100medium activity

    Cloudy: 0–10 °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

    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%

    Bite calendar

    7–Sep 13
    Mon
    Tue
    Wed
    Thu
    Fri
    Sat
    Sun
    Bite activity:highmediumlowslow
    Based on:weatherseasonal
    What is a bite calendar?
    Brown troutBull troutWhitefishBrook troutCutthroat troutMountain whitefishPikeGraylingLake sturgeonRainbow troutSaugerWalleyeGoldeyeYellow perchLake troutBurbot

    Brook trout

    6/10 · Fair

    Hourly activity

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

    The bite is strong — fish are active. A thunderstorm is possible: activity rises before the front and drops after.

    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. A thunderstorm is possible — bring a rain jacket, and pack up at the first rumble of thunder.

    Summary

    Worth going — it's a productive day.

    How this forecast is calculated

    Why this forecast

    The computed water temperature is around 6 °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 °C6 °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 2 hPa over the day — the bite usually settles down after a rise.

    Pressure through the day, 2 hPa change
    00:00 · 100923:00 · 1011 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

    11 SepFriday, September 11
    +3°

    Showers · feels like 0°

    Low / high
    0°…+5°
    Precipitation
    3.2 mm
    Wind
    2 m/s N
    Cloud cover
    100%
    Humidity
    97%
    Pressure
    1007 hPa
    00:00+5°—2 m/ssouthwest wind, 2 m/s76%22%
    01:00+5°—2 m/ssouthwest wind, 2 m/s77%23%
    02:00+5°—2 m/ssouthwest wind, 2 m/s78%37%
    03:00+4°—1 m/ssouthwest wind, 1 m/s79%52%
    04:00+4°—1 m/ssouthwest wind, 1 m/s80%68%
    05:00+4°—0 m/ssoutheast wind, 0 m/s82%87%
    06:00+4°—1 m/seast wind, 1 m/s83%100%
    07:00+5°0.2 mm1 m/seast wind, 1 m/s83%100%
    08:00+5°0.2 mm1 m/ssoutheast wind, 1 m/s84%100%
    09:00+5°0.2 mm1 m/ssoutheast wind, 1 m/s85%100%
    10:00+5°3.2 mm1 m/seast wind, 1 m/s89%100%
    11:00+4°3.2 mm1 m/snorth wind, 1 m/s93%100%
    12:00+3°3.2 mm2 m/snorth wind, 2 m/s97%100%
    13:00+2°3.9 mm2 m/snorth wind, 2 m/s99%100%
    14:00+1°3.9 mm2 m/snorth wind, 2 m/s100%100%
    15:00+1°3.9 mm2 m/snorth wind, 2 m/s100%100%
    16:00+1°1.9 mm1 m/snortheast wind, 1 m/s100%100%
    17:00+1°1.9 mm1 m/snortheast wind, 1 m/s99%100%
    18:00+1°1.9 mm1 m/seast wind, 1 m/s99%100%
    19:00+1°0.1 mm1 m/seast wind, 1 m/s99%100%
    20:00+1°0.1 mm1 m/seast wind, 1 m/s99%100%
    21:00+1°0.1 mm1 m/ssoutheast wind, 1 m/s99%100%
    22:000°—0 m/ssoutheast wind, 0 m/s98%100%
    23:000°—0 m/swest wind, 0 m/s96%100%
    +5°+3°+0°
    Weather throughout the day
    0:006:0012:0018:0023:00

    Sun and moon

    Friday, September 11
    The day: daylight and the hours the moon is above the horizon. Local time0:0012:0024:00
    DaylightMoon above the horizon
    Sunrise
    07:14
    Sunset
    20:07
    Day length
    12 h 53 min
    Sunshine hours
    58 min
    UV index
    0
    low
    Moon
    New moon
    Moonrise
    07:48
    Moonset
    19:56

    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

    +16% in the windowFriday, September 11
    Feeding windows on the day scale, local time0:0012:0024:00
    Major periodsMinor periods
    • Major00:37–02:37Moon underfoot
    • Minor07:18–08:18Moonrise
    • Major13:00–15:00Moon overhead
    • Minor19:26–20:26Moonset

    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?