Bosham Stream from West Ashling to Bosham including Churchfield Stream.
See below for historical flood warnings, or use the live map to check the latest warnings across the UK.
The orange highlighted area on the map below outlines the area covered by this Flood Alert.
Number of historic Flood Alerts that have previously been recorded for this area.
Bosham Stream
High river levels on Wednesday may lead to flooding. Flooding is possible on 18 February 2026 from 21:00, as a lot of rain (35mm) is forecast today. Flooding could affect fields, roads and gardens of Bosham Lane, near the Millstream Hotel, Brook Avenue, and Critchfield Road, Bosham. Flood water will also affect fields near Ratham Lane, Broadbridge and could affect Mill properties in West Ashling. Rain is forecast to continue until 04:00 on 19/02/2026. River levels and flood risk should begin to reduce in Bosham by 11:00 on 19/02/2026. We are clearing blockages from debris screens and operating our structure near the A27 to reduce flood risk in Bosham. Don't put yourself or others at risk . Avoid roads that flood (Bosham Lane). Report blockages to 0800 80 70 60. This message will be updated by 6:00PM on 19 February 2026 or as the situation changes.