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Thorney Island to West Itchenor

Coastal areas between Thorney Island and West Itchenor, including Prinsted, Nutbourne, Chidham, Bosham, Bosham Hoe, Dell Quay, Salterns and Ellanore Lane

Flood alert area Chichester Harbour West Sussex Solent and South Downs

Flood Alert Active Warning

Raised: 25 Oct 2026 at 11:35am • Updated: 25 Oct 2026 at 11:35am
High tides on Sunday may lead to flooding. 
Flooding is possible for 1 hour either side of Sunday evening's tide at 22:30 on 25/10/2026. 
The weather increases tide table values by 0.48 m. Total forecast tide is 5.24 metres Chart Datum (2.50 mAOD) at Chichester Harbour. The tide will flood Shore Road. At Bosham High Street, water will be near to or flood front door steps. Land of shore side properties around the Harbour could also be affected. Monday morning’s tide at 11:00 on 26/10/2026 is forecast to be 15cm higher.
A Flood Warning will be issued for Monday morning’s tide and isolated property flooding is expected in Bosham.
Monday evening’s tide at 23:00 will be lower and no further flooding is predicted. 
We are closely monitoring the situation . 
Consider activating any flood protection products you may have.  
This message will be updated by 6:00PM on Monday 26 October or as the situation changes.

Map

Nearby Monitoring Stations

Bosham Moreton Road
Bosham Stream • Bosham • 2.6 km
Steady · normal
0.23 m
48min ago
Emsworth
West Brook • Emsworth • 4.5 km
Rising · normal — Up 0.24 m since 09:15, still rising (0.21 m/h)
2.12 m
33min ago
WESTBOURNE GS
• 5.0 km
Steady
0.02 m
48min ago
Westbourne
River Ems • Westbourne • 5.0 km
Steady · normal
0.07 m
48min ago
Crosslands Drive
River Lavant • Havant • 7.3 km
Rising · normal
0.17 m
33min ago
West Street
River Lavant • Havant • 7.3 km
Steady · normal
7.07 m
33min ago
Havant
Hermitage Stream • Havant • 8.0 km
Rising · normal
5.11 m
33min ago
Chichester Tozer Way
River Lavant • Chichester • 8.8 km
Easing · normal — Easing — down from 12.67 at 07:00, now 12.64
12.64 m
48min ago
Graylingwell
River Lavant • Graylingwell • 9.5 km
Rising slightly · normal — Up 0.03 m since 03:00, rising slightly
0.02 m
33min ago
Medmerry
Tide • Selsey • 10.5 km
tidal gauge
2.83 m
48min ago

Flood Event History (50)

25 Oct 2026 at 11:35am Flood Alert
High tides on Sunday may lead to flooding.  Flooding is possible for 1 hour either side of Sunday evening's tide at 22:30 on 25/10/2026.  The weather increases tide table values by 0.48 m. Total forecast tide is 5.24 metres Chart Datum (2.50 mAOD) at Chichester Harbour. The tide will flood Shore Ro...
2 Feb 2026 at 2:02pm Flood Alert
8 Jan 2026 at 3:18pm Flood Alert
6 Dec 2025 at 12:42pm Flood Alert
4 Nov 2025 at 2:59pm Flood Alert
9 Sep 2025 at 5:25pm Flood Alert
30 Mar 2025 at 3:03pm Flood Alert
18 Dec 2024 at 3:04pm Flood Alert
19 Oct 2024 at 4:22pm Flood Alert
18 Oct 2024 at 4:50pm Flood Alert
16 Oct 2024 at 12:30pm Flood Alert
11 Apr 2024 at 4:37pm Flood Alert
10 Apr 2024 at 4:56pm Flood Alert
9 Apr 2024 at 2:01pm Flood Alert
8 Apr 2024 at 1:04pm Flood Alert
7 Apr 2024 at 1:42pm Flood Alert
28 Mar 2024 at 9:09am Flood Alert
12 Mar 2024 at 4:30pm Flood Alert
10 Mar 2024 at 12:04pm Flood Alert
13 Feb 2024 at 6:16pm Flood Alert
12 Feb 2024 at 2:22pm Flood Alert
11 Feb 2024 at 3:38pm Flood Alert
10 Feb 2024 at 2:16pm Flood Alert
9 Feb 2024 at 5:41pm Flood Alert
8 Feb 2024 at 4:54pm Flood Alert
27 Oct 2023 at 11:26pm Flood Alert
1 Sep 2023 at 12:44am Flood Alert
4 Aug 2023 at 5:12pm Flood Alert
1 Aug 2023 at 2:14pm Flood Alert
22 Mar 2023 at 12:17pm Flood Alert
9 Mar 2023 at 12:59pm Flood Alert
8 Nov 2022 at 9:26am Flood Alert
21 Feb 2022 at 9:52am Flood Alert
20 Feb 2022 at 4:59pm Flood Alert
20 Feb 2022 at 9:33am Flood Alert
18 Feb 2022 at 5:17pm Flood Alert
17 Feb 2022 at 4:49pm Flood Alert
4 Jan 2022 at 8:12am Flood Alert
6 Dec 2021 at 4:59pm Flood Alert
6 Nov 2021 at 4:19pm Flood Alert
20 Oct 2021 at 2:51pm Flood Alert
1 Feb 2021 at 6:58pm Flood Alert
14 Dec 2020 at 5:38pm Flood Alert
15 Nov 2020 at 11:53am Flood Alert
14 Nov 2020 at 2:06pm Flood Alert
13 Nov 2020 at 5:58pm Flood Alert
20 Aug 2020 at 6:40pm Flood Alert
12 Mar 2020 at 7:49am Flood Alert
11 Mar 2020 at 1:48pm Flood Alert
11 Mar 2020 at 8:18am Flood Alert

Related Flood Areas

Bosham and West Itchenor
Chichester Harbour • West Sussex • Flood Warning
Climping Seafront
English Channel • West Sussex • Flood Alert
Coastal areas of West Wittering to Medmerry
The Solent, English Channel • West Sussex • Flood Alert
Selsey Bill to Elmer
English Channel • West Sussex • Flood Alert
Tidal areas of Littlehampton Rope Walk
Littlehampton Harbour • West Sussex • Flood Alert
Aldingbourne and Barnham Rifes
Aldingbourne and Barnham Rifes • West Sussex
Amberley on the River Arun
River Arun • West Sussex
Angmering on the Black Ditch
Black Ditch • West Sussex
Arundel on the River Arun
River Arun • West Sussex
Arundel, River Road
River Arun • West Sussex
Barnham on the Barnham Rife
Barnham Rife • West Sussex
Bersted on the Aldingbourne Rife
Aldingbourne Rife • West Sussex

Official sources for this area

This area on the Environment Agency’s flood service →
Floodline quick dial: 216027 — call 0345 988 1188 and give that code for a recorded update on this area.
Area code: 065WAC401

Live warnings and area boundaries are the Environment Agency’s and the EA is the authority on them. Contains public sector information licensed under the Open Government Licence v3.0. This area in the EA’s own data.