A Flood Alert was issued for Tidal Fal Estuary in Cornwall on 29th September 2026. Affected watercourses included the South Cornwall Coast, Tidal Fal Estuary.
During this event, FloodRadar monitoring gauges recorded notable rises. The South Cornwall Coast at Truro Harbour rose 3.16m, peaking at 2.68m, while the Carnon River at Bissoe climbed 0.14m.
Environment Agency advice issued
High tides and forecast weather conditions over the next two days may lead to flooding. Flooding is possible 2 hours either side of high tide on Tuesday evening and Wednesday morning. Areas particularly at risk include low lying areas in Falmouth, Penryn, Flushing, Mylor Bridge, the A39 at Perranarworthal, Devoran, Calenick, Truro and the A390 at Tresillian. The high tide at Falmouth on Tuesday is at 19:33 and Wednesday at 07:50, times will vary along the coast. Forecast total high tide level is 2.68 and 2.51mAOD respectively. Expect tide levels along the coast to be between 0.42 and 0.47 me
Monitoring gauges during this event
| Station | River | Rise | Peak |
|---|---|---|---|
| Truro Harbour | South Cornwall Coast | +3.16m | 2.68m |
| Bissoe | Carnon River | +0.14m | 0.39m |
| Truro | River Kenwyn | +0.13m | 0.21m |
| Idless Dam | River Allen | +0.10m | 0.11m |
| Bolingey Cocks Bridge | Bolingey Stream | +0.10m | 0.30m |
| Boscadjack | River Cober | +0.07m | 0.35m |
| Trenear | River Cober | +0.06m | 0.42m |
| Rose in Vale | Perrancombe Stream | +0.05m | 0.33m |