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River Tweed (Northumberland) — a popular fishing spot. About 32 km long. Flows into North Sea. A smart bite calendar — moon phase, atmospheric pressure, and weather combined into an hourly fish-activity forecast for the coming days.
Cloudy: 4–17 °C
The course is moderately sinuous: pools are scoured at the bends and riffles run between them.
Recorded 4 catches here. Most commonly caught: Atlantic salmon. Peak season: June–August.
Thursday, September 24
Fish near current breaks and deeper pools at dawn and dusk. Use a silver spinner or a streamer fly to mimic small prey.
River Tweed — Thursday, September 24
Expect good activity early morning and evening as fish feed during cooler, cloudy times. Falling pressure keeps them alert and moving. Peak 06:00–08:00 and 18:00–20:00.
The computed water temperature is around 12 °C — inside the 4–14 °C comfort range for Atlantic salmon, so baseline activity is high.
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 10 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 +12°
The day is 5 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?