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 on 28th September 2026. Affected watercourses included the River Thames.
During this event, FloodRadar monitoring gauges recorded notable rises. The River Thames at Thames Ditton Island rose 0.54m, peaking at 4.80m, while the River Thames at Kingston climbed 0.43m.
Environment Agency advice issued
High tides overnight may lead to flooding. Flooding is possible from 04:00 AM to 06:00 AM on Tuesday 29 September. The forecast high tide at Richmond is 4.60 mAOD at 05:00 AM on Tuesday 29 September. Locations most affected will be 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 rising. The river flow at Teddington Weir is 5 cubic met
Monitoring gauges during this event
| Station | River | Rise | Peak |
|---|---|---|---|
| Thames Ditton Island | River Thames | +0.54m | 4.80m |
| Kingston | River Thames | +0.43m | 4.73m |
| Teddington Lock | River Thames | +0.38m | 0.31m |
| Trowlock Island | River Thames | +0.36m | 4.69m |
| Molesey Lock | River Thames | +0.21m | 0.29m |
| Sunbury Lock | River Thames | +0.11m | 0.28m |
| Penton Hook | River Thames | +0.08m | 0.17m |