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Portsmouth

Coastal area around Portsmouth

Flood alert area The Solent, Portsmouth Harbour, Langstone Harbour Portsmouth Solent and South Downs

Flood Alert Active Warning

Raised: 25 Oct 2026 at 5:43pm • Updated: 25 Oct 2026 at 5:43pm
High tides on Monday may lead to flooding. 
Flooding is possible for 1 hour either side of Monday morning's tide at 11:00 on 26/10/2026. 
The weather increases tide table values by 0.44 m. Total forecast tide is 5.37 metres Chart Datum (2.64 mAOD) at Portsmouth. Strong Southerly Force 5 wind. In Old Portsmouth, the tide may just exceed the top of the main slipway which will cause minor road flooding in East Street and to the boat yards at The Camber. Spray overtopping of defence walls at Southsea promenade and Eastern road is also expected. To protect property in Old Portsmouth, tidal defence gates will be closed. Monday's tide at 23:18 26/10/2026 is forecast to be 29 cm lower (2.35 mAOD). 
We are liaising with emergency services and local authorities . 
Don't put yourself or others at risk.  
This message will be updated by 6:00PM on Monday 26 October or as the situation changes.

Map

Nearby Monitoring Stations

Portsmouth on the boundary
Tide • Gosport • 4.3 km
tidal gauge
2.45 m
33min ago
Havant
Hermitage Stream • Havant • 6.6 km
Rising · normal
5.11 m
33min ago
West Street
River Lavant • Havant • 6.7 km
Steady · normal
7.07 m
33min ago
Crosslands Drive
River Lavant • Havant • 7.7 km
Rising · normal
0.17 m
33min ago
Browndown
River Alver • Gosport • 8.1 km
Steady · normal
1.20 m
33min ago
Denmead
River Wallington • Denmead • 8.4 km
Rising · normal
33.36 m
33min ago
North Fareham weir
River Wallington • Wallington • 9.0 km
structure gauge
0.23 m
33min ago
NORTH FAREHAM GS
• 9.0 km
Falling — Down from 0.52 at 02:45, now 0.37
0.37 m
33min ago
Emsworth
West Brook • Emsworth • 9.3 km
Rising · normal — Up 0.24 m since 09:15, still rising (0.21 m/h)
2.12 m
33min ago
Westbourne
River Ems • Westbourne • 10.6 km
Steady · normal
0.07 m
48min ago

Flood Event History (50)

25 Oct 2026 at 5:43pm Flood Alert
High tides on Monday may lead to flooding.  Flooding is possible for 1 hour either side of Monday morning's tide at 11:00 on 26/10/2026.  The weather increases tide table values by 0.44 m. Total forecast tide is 5.37 metres Chart Datum (2.64 mAOD) at Portsmouth. Strong Southerly Force 5 wind. In Old...
8 Jan 2026 at 12:52pm Flood Alert
6 Dec 2025 at 3:58pm Flood Alert
6 Nov 2025 at 3:10pm Flood Alert
5 Nov 2025 at 3:26pm Flood Alert
4 Nov 2025 at 5:39pm Flood Alert
5 Jan 2025 at 4:34pm Flood Alert
31 Dec 2024 at 6:00pm Flood Alert
20 Oct 2024 at 8:33am Flood Alert
9 Apr 2024 at 8:46am Flood Alert
8 Apr 2024 at 12:58pm Flood Alert
27 Mar 2024 at 8:37pm Flood Alert
11 Feb 2024 at 6:38pm Flood Alert
11 Feb 2024 at 3:34pm Flood Alert
10 Feb 2024 at 7:34pm Flood Alert
10 Feb 2024 at 2:12pm Flood Alert
9 Feb 2024 at 4:57pm Flood Alert
8 Feb 2024 at 4:08pm Flood Alert
27 Oct 2023 at 11:32pm Flood Alert
1 Aug 2023 at 4:01pm Flood Alert
22 Mar 2023 at 12:13pm Flood Alert
24 Nov 2022 at 6:38pm Flood Alert
23 Nov 2022 at 6:06pm Flood Alert
7 Nov 2022 at 2:37pm Flood Alert
18 Feb 2022 at 2:58pm Flood Alert
17 Feb 2022 at 3:04pm Flood Alert
7 Dec 2021 at 4:07pm Flood Alert
6 Dec 2021 at 2:36pm Flood Alert
15 Nov 2020 at 3:13pm Flood Alert
14 Nov 2020 at 2:33pm Flood Alert
13 Nov 2020 at 3:55pm Flood Alert
20 Aug 2020 at 5:48pm Flood Alert
11 Mar 2020 at 3:09pm Flood Alert
10 Mar 2020 at 2:21pm Flood Alert
12 Feb 2020 at 1:54pm Flood Alert
10 Feb 2020 at 4:02pm Flood Alert
9 Feb 2020 at 11:38am Flood Alert
14 Jan 2020 at 12:50pm Flood Alert
26 Nov 2019 at 4:23pm Flood Alert
25 Nov 2019 at 3:26pm Flood Alert
1 Nov 2019 at 4:51pm Flood Alert
30 Sep 2019 at 6:17pm Flood Alert
28 Sep 2019 at 5:18pm Flood Alert
28 Sep 2019 at 12:11pm Flood Alert
6 Nov 2018 at 4:49pm Flood Alert
3 Jan 2018 at 5:28pm Flood Alert
2 Jan 2018 at 8:17pm Flood Alert
20 Oct 2017 at 6:59pm Flood Alert
27 Feb 2017 at 3:02pm Flood Alert
16 Nov 2016 at 8:22pm Flood Alert

Related Flood Areas

Eastern Portsmouth
Langstone Harbour • Portsmouth
Hilsea
Portsmouth Harbour • Portsmouth
Old Portsmouth
Portsmouth Harbour, The Solent • Portsmouth
Southsea
The Solent • Portsmouth
Tipner and Stamshaw
Portsmouth Harbour • Portsmouth

Official sources for this area

This area on the Environment Agency’s flood service →
Floodline quick dial: 216023 — call 0345 988 1188 and give that code for a recorded update on this area.
Area code: 065WAC158

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.