A Flood Alert was issued for River Thames from Shepperton to Molesey in Greater London, Richmond upon Thames, Surrey between 25th and 27th February 2026. Affected watercourses included the River Thames.
During this event, FloodRadar monitoring gauges recorded notable rises. The River Thames at Teddington Lock rose 5.76m, peaking at 5.74m, while the River Thames at Penton Hook climbed 3.86m.
Environment Agency advice issued
High river levels today may lead to flooding. Flooding is possible on 27 February 2026. River levels are high but slowly falling on the River Thames. Flooding of low lying land and roads is expected to continue today, 27 February 2026, especially in the Sunbury area. Light rainfall is forecast for today and tomorrow. We are monitoring rainfall and river levels. We are liaising with emergency services and local authorities. Avoid using low lying footpaths and any bridges near local watercourses. Go to River levels online for updates on current river levels. This message will be updated by 8:00P
Monitoring gauges during this event
| Station | River | Rise | Peak |
|---|---|---|---|
| Teddington Lock | River Thames | +5.76m | 5.74m |
| Penton Hook | River Thames | +3.86m | 4.00m |
| Shepperton Lock | River Thames | +3.64m | 3.76m |
| Molesey Lock | River Thames | +3.56m | 3.65m |
| Chertsey Lock | River Thames | +3.26m | 3.63m |
| Thames Ditton Island | River Thames | +0.48m | 5.55m |
| Kingston | River Thames | +0.48m | 4.94m |
| Staines | River Thames | +0.41m | 3.55m |
| Walton | River Thames | +0.22m | 3.52m |