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Flood Warning: Portsmouth

Message Last Updated:
2025-11-04 17:39:00

Severity Last Changed:
2025-11-04 17:39:00

High tides on Wednesday may lead to flooding. 

Flooding is possible for 1 hour either side of Wednesday morning's tide at 10:30 on 05/11/25. 

The weather increases tide table values by 0.31 m. Total forecast tide is 5.36 metres Chart Datum (2.63 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. To protect property in Old Portsmouth, tidal defence gates will be closed. Wednesday's tide at 22:45 on 05/11/25 is forecast to be 13 cm lower (2.5 mAOD). There is no significant rainfall in the forecast outlook. Flood impacts are predicted at each high tide until Saturday 08/11/25. 

We are liaising with emergency services and local authorities . 

Don't put yourself or others at risk . 

This message will be updated by 3:00PM on 05 November 2025 or as the situation changes.