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Recorded 2 catches of Grayling in Cornwall. Most active — June. A day-by-day bite calendar for Grayling.
Friday, September 4
The bite is strong — fish are active. Pressure is dropping — this usually boosts the bite.
Best time — 11:00–17:00 (daytime activity).
Work the cover — snags, weed edges, hole entrances; retrieve the lure with pauses.
The water's turning murky — go with bright, noisy lures: fly or small spinner.
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 16 °C — inside the 6–18 °C comfort range for Grayling, so baseline activity is high.
Grayling feeds by day — between sunrise and sunset; their times are in the sun-and-moon card above.
Pressure is rising 6 hPa over the day — the bite usually settles down after a rise.
September is peak season for Grayling here.
These are the same values the bite curve above was computed from. How the forecast works
Drizzle · feels like +15°
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.
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