A Flood Alert was issued for River Thames at Trowlock Island in Greater London, Richmond upon Thames on 24th February 2026. Affected watercourses included the River Thames.
During this event, FloodRadar monitoring gauges recorded notable rises. The River Thames at Teddington Lock rose 1.79m, peaking at 5.95m, while the River Thames at Kingston climbed 0.65m.
Environment Agency advice issued
High tides combined with high river flows upstream could lead to flooding. Flooding is possible on 24 Feb 2026. River levels are high on the River Thames. Flooding of low lying land and roads is possible during high tides today, 24 Feb 2026, especially in areas around Trowlock Island. Very little rainfall is forecast over the next few days. We expect river levels to slowly fall over the next few days. Additionally, tides are declining into neaps, so we expect peak levels to be getting lower. The next high tide is at 7:00pm on 24 February and could reach between 4.70m and 4.83m, the 2nd tide is
Monitoring gauges during this event
| Station | River | Rise | Peak |
|---|---|---|---|
| Teddington Lock | River Thames | +1.79m | 5.95m |
| Kingston | River Thames | +0.65m | 5.10m |
| Trowlock Island | River Thames | +0.49m | 5.04m |
| Thames Ditton Island | River Thames | +0.49m | 5.69m |
| Molesey Lock | River Thames | +0.41m | 3.77m |
| Penton Hook | River Thames | +0.30m | 4.09m |
| Chertsey Lock | River Thames | +0.25m | 3.72m |
| Sunbury Lock | River Thames | +0.22m | 3.38m |
| Shepperton Lock | River Thames | +0.19m | 3.79m |
| Walton | River Thames | +0.17m | 3.52m |