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River Colne (Hertfordshire) — one of the area's fishing spots. About 35 km long. Flows into North Sea. The town of St Albans is nearby. Here you'll find a bite prediction — when fish are active and which hours give the best chances, adjusted for weather and pressure.
Recorded 103 catches here. Most commonly caught: Roach, Perch, Bream. Peak season: year-round.
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 |
|---|---|---|
| Roach | 43 | 42% |
| Perch | 23 | 22% |
| Bream | 21 | 20% |
| Tench | 13 | 13% |
| Chub | 10 | 10% |
| Dace | 7 | 7% |
| Pike | 6 | 6% |
| Barbel | 2 | 2% |
| Carp | 2 | 2% |
| Brown trout | 1 | 1% |
| Wels catfish | 1 | 1% |
| Rudd | 1 | 1% |
| Silver carp | 1 | 1% |
| White bream | 1 | 1% |
Wednesday, September 2
The bite is strong — fish are active. Pressure is rising — activity tends to be more subdued.
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: salmon spoon or salmon fly.
No special gear needed — seasonal clothing will do. Rain is expected — don't forget a rain jacket or a waterproof shell.
Worth going — it's a productive day.
The computed water temperature is around 17 °C — warmer than the 4–14 °C comfort range for Atlantic salmon: in the heat it drops deeper and feeds less often.
Atlantic salmon works the twilight: the peaks are pinned to sunrise and sunset — their times are in the sun-and-moon card above.
Pressure is dropping 3 hPa over the day — fish are usually more active ahead of a weather change.
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 Atlantic salmon here.
These are the same values the bite curve above was computed from. How the forecast works
Cloudy · feels like +17°
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 River Colne: current gauge height, streamflow, and water temperature when reported by the source.
Environment Agency gauge River Colne at Watford, 0.8 mi away · typical 0.12–0.82 m · measured 2026-09-02 08:45 · data source · provisional data, subject to revision