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Reservoir Llyn Cwellyn (Gwynedd) — one of the area's fishing spots. About 90 ha in area. Nearest town — Criccieth. This page shows an hourly bite forecast for today and the week ahead; the algorithm factors in the weather, atmospheric pressure, and the moon phase.
Recorded 1 catch here. Most commonly caught: Brown trout. Peak season: September.
The bite is moderate — fish feed in short bursts. A thunderstorm is possible: activity rises before the front and drops after.
Best time — 12:00–17:00 (daytime activity).
Chum one spot near a drop-off and wait for fish to arrive — don't chase them.
Today's bait — maggot or small hook with dough bait. In cold or murky water, add scent to your chum.
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 16 °C — inside the 14–26 °C comfort range for Bleak, so baseline activity is high.
Bleak feeds by day — between sunrise and sunset; their times are in the sun-and-moon card above.
Pressure is dropping 4 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 a slow season for Bleak: the best months fall at another time of year.
These are the same values the bite curve above was computed from. How the forecast works
Drizzle · feels like +16°
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?