A Flood Alert was issued for Tidal Thames riverside from the Thames Barrier to Putney Bridge in City of London, Greater London, Greenwich, Hammersmith and Fulham, Kensington and Chelsea, Lambeth, Lewisham, Newham, Southwark, Tower Hamlets, Wandsworth, Westminster on 9th October 2026. Affected watercourses included the River Thames.
During this event, FloodRadar monitoring gauges recorded notable rises. The River Thames at Kingston rose 0.15m, peaking at 4.41m, while the River Thames at Thames Ditton Island climbed 0.12m.
Environment Agency advice issued
High tides overnight may lead to flooding. Flooding is possible from 01:00 AM to 03:00 AM on Saturday 10th October. The forecast high tide at London Bridge is 4.50 mAOD at 02:00 AM on 10/10/2026. We believe there is a possibility of flooding for Custom House (EC3R), Narrow Street (E14), Mayflower and Angel pubs (SE16), Royal Naval College riverfront, the Almshouse Slipway at Crane Street (SE10), Bankside by the Tate Modern (SE1), and Three Mill Island (E3). Flooding of properties is not expected. Astronomical tide levels are rising. The river flow at Teddington Weir is 4 cubic metres per sec
Monitoring gauges during this event
| Station | River | Rise | Peak |
|---|---|---|---|
| Kingston | River Thames | +0.15m | 4.41m |
| Thames Ditton Island | River Thames | +0.12m | 4.36m |
| Teddington Lock | River Thames | +0.12m | 0.02m |
| Molesey Lock | River Thames | +0.11m | 0.19m |
| Sunbury Lock | River Thames | +0.09m | 0.30m |
| Shepperton Lock | River Thames | +0.08m | 0.17m |