Flood alert: Portsmouth

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On Wednesday, no flooding is expected but tides are higher than usual. On Monday night and Tuesday, no flooding is expected. On Wednesday afternoon, the weather increases tide table values by 0.22 m. The total forecast tide is 5.23 metres Chart Datum (2.50 mAOD) at Portsmouth. Light Westerly Force 4 wind. Wednesday's tide at 00:45 on 29/10/2026 is forecast to be 47 cm lower (2.03 mAOD). We are liaising with emergency services and local authorities over flood defence gate closures around Portsmouth. Consider activating any flood protection products you may have. This message will be updated by 06:00 PM on 27/10/2026.