A Flood Alert was issued for Tidal Thames riverside from Putney Bridge to Teddington Weir in Greater London, Hammersmith and Fulham, Hounslow, Richmond upon Thames, Wandsworth between 15th and 18th May 2026. Affected watercourses included the River Thames.
During this event, FloodRadar monitoring gauges recorded notable rises. The River Thames at Thames Ditton Island rose 0.27m, peaking at 4.88m, while the River Thames at Sunbury Lock climbed 0.17m.
Environment Agency advice issued
High tides tomorrow morning may lead to flooding. Flooding is possible from 4:00 AM to 6:00 AM on 19/05/2026. The forecast high tide at Richmond is 4.60 mAOD at 05:00 AM on 19/05/2026. We believe there is a possibility of flooding for Putney Embankment (SW15), Chiswick Mall and Strand on the Green (W4), Thames Bank at Mortlake (SW14), Ranelagh Drive (TW1), Friars Lane and Water Lane (TW9), Riverside and The Embankment at Twickenham, and the Towpath below Teddington Lock. Flooding of properties is not expected. Astronomical tide levels are peaking. The river flow at Teddington Weir is 25 cubi
Monitoring gauges during this event
| Station | River | Rise | Peak |
|---|---|---|---|
| Thames Ditton Island | River Thames | +0.27m | 4.88m |
| Sunbury Lock | River Thames | +0.17m | 2.60m |
| Staines | River Thames | +0.15m | 2.82m |