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Lake Pwll Trefeiddan (Pembrokeshire) — a spot well known among anglers. About 1 ha in area. Nearest town — St Davids. See when the bite is best: hourly fish activity for the days ahead, computed from the weather, pressure, and season.
The shoreline is moderately indented: bays and points alternate with even stretches.
The water is sheltered: there is almost no fetch, so wind stirs it up very little.
Cloudy: 13–17 °C
Chum one spot near a drop-off and wait for fish to arrive — don't chase them.
ThunderstormThunderstorm possible: put the rod down and leave open shoreline at the first rumble.
Pwll Trefeiddan — Friday, September 18
The bite is weak — fish are sluggish. A thunderstorm is possible: activity rises before the front and drops after. Peak 11:00–15:00.
The computed water temperature is around 15 °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 1 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
Cloudy · feels like +12°
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?