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Wednesday, October 21
Work the cover — snags, weed edges, hole entrances; retrieve the lure with pauses. The water's cold — fish it more delicately and slowly.
Rhondda Cynon Taf — Wednesday, October 21
The bite is moderate — fish feed in short bursts. A thunderstorm is possible: activity rises before the front and drops after. Peak 13:00–17:00.
The computed water temperature is around 10 °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 8 hPa over the day — the bite usually settles down after a rise.
October is peak season for Grayling here.
These are the same values the bite curve above was computed from. How the forecast works
Rain · feels like -1°
The day is 4 min shorter than yesterday.
Sunshine hours count direct sun only — cloud cover cuts it, so it is shorter than daylight.
Geomagnetic fieldG1 geomagnetic storm, Kp 4.7
Kp index — NOAA data. Not part of the bite score: catches show no link between geomagnetic storms and the bite.
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?