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 15th August 2026. Affected watercourses included the River Thames.
During this event, FloodRadar monitoring gauges recorded notable rises. The River Thames at Sunbury Lock rose 3.34m, peaking at 0.31m, while the River Thames at Thames Ditton Island climbed 0.41m.
Environment Agency advice issued
High tides overnight may lead to flooding. Flooding is possible from 05:00 AM to 07:00 AM on Sunday 16th August. The forecast high tide at Richmond is 4.60 mAOD at 06:00 AM on Sunday 16th August. 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 falling. The river flow at Teddington Weir
Monitoring gauges during this event
| Station | River | Rise | Peak |
|---|---|---|---|
| Sunbury Lock | River Thames | +3.34m | 0.31m |
| Thames Ditton Island | River Thames | +0.41m | 4.73m |
| Trowlock Island | River Thames | +0.40m | 4.65m |
| Kingston | River Thames | +0.32m | 4.65m |
| Teddington Lock | River Thames | +0.28m | 0.26m |
| Molesey Lock | River Thames | +0.15m | 0.16m |
| Shepperton Lock | River Thames | +0.13m | 0.17m |
| Penton Hook | River Thames | +0.12m | 0.14m |
| Staines | River Thames | +0.09m | 2.62m |