A Flood Alert was issued for Selsey Bill to Elmer in West Sussex on 26th October 2026. Affected watercourses included the English Channel.
During this event, FloodRadar monitoring gauges recorded notable rises. The River Arun at Littlehampton rose 4.95m, peaking at 3.44m, while the River Arun at Arundel climbed 3.52m.
Environment Agency advice issued
There is no longer a threat of flooding, though standing water and debris may still remain. Coastal conditions are expected to improve and no flooding is expected. We will continue to monitor the situation and work with emergency services and local authorities. Stay away from floodwater - it contains hidden dangers such as open manhole covers, sewage and chemicals.
Monitoring gauges during this event
| Station | River | Rise | Peak |
|---|---|---|---|
| Littlehampton | River Arun | +4.95m | 3.44m |
| Arundel | River Arun | +3.52m | 3.13m |
| Houghton Bridge | River Arun | +2.34m | 2.74m |
| Medmerry | Tide | +1.56m | 2.86m |
| Bognor | Aldingbourne Rife | +0.41m | 0.24m |
| Chichester Tozer Way | River Lavant | +0.06m | 12.68m |
| Graylingwell | River Lavant | +0.05m | 0.04m |