A Flood Alert was issued for River Thames from Hurley to Cookham in Buckinghamshire, Windsor and Maidenhead 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 Bray Lock rose 3.51m, peaking at 3.65m, while the River Thames at Cookham Lock climbed 3.33m.
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 declining on the River Thames. Flooding of low lying land and roads is expected to continue today, 27 February 2026, especially in the Hurley and Marlow areas. 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 upd
Monitoring gauges during this event
| Station | River | Rise | Peak |
|---|---|---|---|
| Bray Lock | River Thames | +3.51m | 3.65m |
| Cookham Lock | River Thames | +3.33m | 3.58m |
| Boulters Lock | River Thames | +3.29m | 3.34m |
| Marlow Lock | River Thames | +3.21m | 3.64m |
| Marsh Lock | River Thames | +3.13m | 3.27m |
| Hurley Lock | River Thames | +2.16m | 2.23m |
| Hambleden Lock | River Thames | +0.60m | 0.70m |
| Temple Lock | River Thames | +0.20m | 0.23m |
| Maidenhead | River Thames | +0.10m | 2.92m |
| Boveney Lock | River Thames | +0.09m | 0.17m |