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Shiawassee River (Michigan) — one of the area's fishing spots. About 182 km long. The town of Saginaw is nearby. A smart bite calendar — moon phase, atmospheric pressure, and weather combined into an hourly fish-activity forecast for the coming days.
Cloudy: 52–75 °F
BiteGuideFrom anglers’ reports
This is a summary of anglers' reports, not a proven cause of the bite: conditions lining up does not mean they drove it.
vertical axis — number of catches
| Value | Catches | Share |
|---|---|---|
| 04:00 | 2 | 40% |
| 08:00 | 2 | 40% |
| 13:00 | 1 | 20% |
Recorded 5 catches here. Most commonly caught: Smallmouth bass. Peak season: August.
Friday, September 4
The bite is moderate — fish feed in short bursts. A thunderstorm is possible: activity rises before the front and drops after.
Best time — 06:00–08:00 (dawn bite) and 19:00–21:00 (dusk bite).
Work the cover — snags, weed edges, hole entrances; retrieve the lure with pauses.
The water's turning murky — go with bright, noisy lures: small jig or minnow bait.
No special gear needed — seasonal clothing will do. A thunderstorm is possible — bring a rain jacket, and pack up at the first rumble of thunder.
An average day — best chances during peak windows.
The computed water temperature is around 65 °F — inside the 57–75 °F comfort range for Black crappie, so baseline activity is high.
Black crappie works the twilight: the peaks are pinned to sunrise and sunset — their times are in the sun-and-moon card above.
Pressure is rising 0.06 inHg 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 Black crappie here.
These are the same values the bite curve above was computed from. How the forecast works
Fog · feels like +71°
The day is 3 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 Shiawassee River: current gauge height, streamflow, and water temperature when reported by the source.
USGS gauge SHIAWASSEE RIVER AT OWOSSO, MI, 8 mi away · measured 2026-09-04 15:15 · data source · provisional data, subject to revision