A Flood Warning was issued for Bosham and West Itchenor in West Sussex on 25th October 2026. Affected watercourses included the Chichester Harbour.
During this event, FloodRadar monitoring gauges recorded notable rises. The Tide at Medmerry rose 1.49m, peaking at 2.79m, while the Hermitage Stream at Havant climbed 0.41m.
Environment Agency advice issued
High tides are expected to cause flooding on Monday. Flooding is expected for 1 hour either side of Monday morning's tide at 11:00 on 26/10/2026. The weather increases tide table values by 0.48 m. Total forecast tide is 5.42 metres Chart Datum (2.68 mAOD) at Chichester Harbour. Strong Southerly Force 6 wind. Flooding will affect Shore Road and a small number of properties in Bosham High Street and Gloucester Terrace. Water will reach the top of slipways in West Itchenor. Monday's evening tide at 23:15 on 26/10/2026 is forecast to be 34 cm lower (2.34 mAOD), with Tuesday's tides lower again,
Monitoring gauges during this event
| Station | River | Rise | Peak |
|---|---|---|---|
| Medmerry | Tide | +1.49m | 2.79m |
| Havant | Hermitage Stream | +0.41m | 5.49m |
| Crosslands Drive | River Lavant | +0.36m | 0.49m |
| Emsworth | West Brook | +0.34m | 2.09m |
| Chichester Tozer Way | River Lavant | +0.24m | 12.86m |
| West Street | River Lavant | +0.18m | 7.22m |
| Westbourne | River Ems | +0.06m | 0.13m |