A Flood Alert was issued for Selsey Bill to Elmer in West Sussex on 25th October 2026. Affected watercourses included the English Channel.
During this event, FloodRadar monitoring gauges recorded notable rises. The River Arun at Littlehampton rose 4.76m, peaking at 3.28m, while the River Arun at Arundel climbed 3.35m.
Environment Agency advice issued
High tides on Monday may lead to flooding. Flooding is possible for 2 hours either side of Monday morning's tide at 11:00 on 26/10/2026. The weather increases tide table values by 0.42 m. Total forecast tide is 6.40 metres Chart Datum (3.35 mAOD) at Littlehampton. Strong Southerly Force 7 wind. Mill Lane, Sidlesham will flood, making access temporarily more difficult. Strong winds and large waves will generate lots of spray affecting the beach top properties and nearby roads in Selsey, Pagham, Bognor and Elmer. Monday's tide at 23:15 on 26/10/2026 is forecast to be 34 cm lower (3.01 mAOD) an
Monitoring gauges during this event
| Station | River | Rise | Peak |
|---|---|---|---|
| Littlehampton | River Arun | +4.76m | 3.28m |
| Arundel | River Arun | +3.35m | 2.97m |
| Houghton Bridge | River Arun | +2.26m | 2.62m |
| Medmerry | Tide | +1.49m | 2.79m |
| Bognor | Aldingbourne Rife | +0.25m | 0.24m |
| Chichester Tozer Way | River Lavant | +0.24m | 12.86m |