A Flood Alert was issued for Aldingbourne and Barnham Rifes in West Sussex between 25th and 26th February 2026. Affected watercourses included the Aldingbourne and Barnham Rifes.
During this event, FloodRadar monitoring gauges recorded notable rises. The River Arun at Littlehampton rose 3.76m, peaking at 2.50m, while the River Arun at Houghton Bridge climbed 1.72m.
Environment Agency advice issued
The Aldingbourne Rife is high following weeks of rain, but slowly falling. Minor flood impacts affecting fields, roads, and land at Riverside Caravan Centre will continue. Very little rain is forecast on Thursday but river levels will not fall far. More rain is forecast on Friday from 00:00 to 06:00 (5-10mm). River levels could rise a small amount, but only minimal flood impacts are expected. However, a less likely scenario suggests 20mm of rain could be possible, which may cause minor flooding to affect Barnham Road and Lake Lane, Barnham from Friday morning. The Aldingbourne Rife could rise
Monitoring gauges during this event
| Station | River | Rise | Peak |
|---|---|---|---|
| Littlehampton | River Arun | +3.76m | 2.50m |
| Houghton Bridge | River Arun | +1.72m | 2.37m |
| Ferring Outfall | River Arun | +1.02m | -2.28m |
| Medmerry | Tide | +0.84m | 2.04m |
| Bognor | Aldingbourne Rife | +0.50m | 0.88m |
| Chichester Tozer Way | River Lavant | +0.08m | 13.54m |