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Where to fish

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Forecast
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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. WednesdaySeptember 2weather-based forecast
    73/100high activity

    Cloudy: 4–14 °C

  2. MondaySeptember 7weather-based forecast
    60/100high activity

    Partly cloudy: -1–13 °C

  3. SundaySeptember 6weather-based forecast
    57/100medium activity

    Fog: -6–8 °C

Nearby towns

  • Lethbridge2 km

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.

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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

Nearby water bodies

  • ReservoirOldman River Reservoir8 km

Bite calendar

7–Sep 13
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Bite activity:highmediumlowslow
Based on:weatherseasonal
What is a bite calendar?
Brown troutMountain whitefishBrook troutBull troutGraylingWhitefishCutthroat troutLake sturgeonPikeRainbow troutSaugerWalleyeYellow perchGoldeyeLake troutBurbot

Brook trout

7/10 · Good

Hourly activity

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

The bite is strong — fish are active. Weather is steady, with no sharp swings — fish behave predictably.

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.

Lures

The water's turning murky — go with bright, noisy lures: spinner or fly.

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

Worth going — it's a productive day.

How this forecast is calculated

Why this forecast

The computed water temperature is around 7 °C — inside the 7–16 °C comfort range for Brook trout, so baseline activity is high.

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 dropping 6 hPa over the day — fish are usually more active ahead of a weather change.

Pressure through the day, 6 hPa change
00:00 · 102123:00 · 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 Brook trout here.

JFMAMJJASOND

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

7 SepMonday, September 7
+11°

Partly cloudy · feels like +10°

Low / high
-2°…+13°
Precipitation
0.0 mm
Wind
1 m/s SE
Cloud cover
47%
Humidity
67%
Pressure
1013 hPa
00:00-1°—2 m/snortheast wind, 2 m/s93%87%
01:00-1°—2 m/snortheast wind, 2 m/s92%65%
02:00-1°—1 m/snortheast wind, 1 m/s91%29%
03:00-1°—1 m/snortheast wind, 1 m/s91%4%
04:00-1°—2 m/snortheast wind, 2 m/s91%4%
05:00-2°—2 m/snortheast wind, 2 m/s92%15%
06:00-1°—2 m/snortheast wind, 2 m/s91%29%
07:00+1°—1 m/snortheast wind, 1 m/s89%44%
08:00+3°—1 m/snortheast wind, 1 m/s86%61%
09:00+5°—1 m/snorth wind, 1 m/s82%71%
10:00+7°—0 m/snorth wind, 0 m/s77%65%
11:00+9°—0 m/ssoutheast wind, 0 m/s72%53%
12:00+11°—1 m/ssoutheast wind, 1 m/s67%47%
13:00+12°—1 m/seast wind, 1 m/s63%58%
14:00+12°—1 m/snortheast wind, 1 m/s59%77%
15:00+13°—1 m/snortheast wind, 1 m/s56%89%
16:00+13°0.1 mm1 m/snortheast wind, 1 m/s55%89%
17:00+13°0.1 mm1 m/snortheast wind, 1 m/s55%82%
18:00+12°0.1 mm1 m/seast wind, 1 m/s58%73%
19:00+10°—1 m/seast wind, 1 m/s66%56%
20:00+8°—1 m/seast wind, 1 m/s77%37%
21:00+6°—1 m/seast wind, 1 m/s85%30%
22:00+5°—1 m/seast wind, 1 m/s87%48%
23:00+5°—1 m/seast wind, 1 m/s87%79%
+13°+6°-2°
Weather throughout the day
0:006:0012:0018:0023:00

Sun and moon

Monday, September 7
The day: daylight and the hours the moon is above the horizon. Local time0:0012:0024:00
DaylightMoon above the horizon
Sunrise
07:07
Sunset
20:17
Day length
13 h 10 min
Sunshine hours
12 h 47 min
UV index
4
moderate
Moon
Waning crescent
Moonrise
02:11
Moonset
18:47

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

+11% in the windowMonday, September 7
Feeding windows on the day scale, local time0:0012:0024:00
Major periodsMinor periods
  • Minor01:41–02:41Moonrise
  • Major09:39–11:39Moon overhead
  • Minor18:17–19:17Moonset
  • Major22:07–00:00Moon 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%