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Belly River (Alberta) — a spot well known among anglers. About 195 km long. Flows into Oldman River, Lake Winnipeg basin. The town of Lethbridge is nearby. A smart bite calendar — moon phase, atmospheric pressure, and weather combined into an hourly fish-activity forecast for the coming days.
Clear: 1–12 °C
Thursday, September 3
The bite is moderate — fish feed in short bursts. Pressure is dropping — this usually boosts the bite.
Best time — 06:00–08:00 (dawn bite) and 20:00–22:00 (dusk bite).
Work the cover — snags, weed edges, hole entrances; retrieve the lure with pauses. The water's cold — fish it more delicately and slowly.
In clear water, natural colors work best: spinner or fly. The water's cold — work the lure slower than usual.
Bring a warm jacket — it's noticeably colder on the water than on shore.
An average day — best chances during peak windows.
The computed water temperature is around 7 °C — inside the 7–16 °C comfort range for Brook trout, so baseline activity is high.
Brook trout works the twilight: the peaks are pinned to sunrise and sunset — their times are in the sun-and-moon card above.
Pressure is rising 4 hPa over the day — the bite usually settles down after a rise.
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.
September is an active season for Brook trout here.
These are the same values the bite curve above was computed from. How the forecast works
Cloudy · feels like +3°
The day is 4 min shorter than yesterday.
Sunshine hours count direct sun only — cloud cover cuts it, so it is shorter than daylight.
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 Belly River: current gauge height, streamflow, and water temperature when reported by the source.
USGS gauge BELLY RIVER NEAR GLENWOOD, 2 km away · measured 2026-09-02 23:30 · data source · provisional data, subject to revision