No official flood warning is active nearby and the closest river stations are within normal ranges.
Updated 2026-08-24 00:48:12 UTC · Official GOV.UK warnings · Flood preparation & help guide
Merton is monitored by 4 Environment Agency river level stations on the River Graveney, the River Wandle, in England. Water levels are updated every 15 minutes.
Merton is monitored by 4 Environment Agency river level stations on the River Graveney, the River Wandle, in England. Water levels are updated every 15 minutes, providing real-time flood monitoring for the area.
The River Graveney is monitored by 1 station (Longley Road). The River Wandle is monitored by 3 stations (Summerstown, Wandle Park Main Channel, Wandle Park Side Channel). Each station records water levels continuously, with data synced to FloodRadar every 5 minutes.
There are 8 Environment Agency flood warning areas within 10km of Merton. When the EA issues a flood warning for any of these areas, it will appear on this page. These include: River Wandle at Wimbledon including Colliers Wood, Merton Abbey, Connollys Mill, Summerstown and Wimbledon Stadium, London Borough of Merton; River Graveney at Tooting and Colliers Wood, London Boroughs of Wandsworth and Merton; River Wandle area in the London Boroughs of Wandsworth, Merton, Lambeth, Croydon and Sutton. Including the Norbury Brook from Thornton Heath to Tooting; River Wandle at Morden, including Morden Hall Park, London Borough of Merton.
There are 28 storm overflows within 5km of Merton. None are currently discharging. Enable "Sewage" on the map above to see their locations.
If flooding is forecast in Merton, call Floodline on 0345 988 1188 for the latest information. Move valuables upstairs, turn off gas and electricity if safe to do so, and avoid walking or driving through flood water. Sign up for flood warnings on any station page above to receive email alerts when water levels rise. For emergency numbers, a preparation checklist and insurance guidance, see our flood help & preparation guide.
Floods whose mapped extent (EA Recorded Flood Outlines) reached within ~5 km of the town centre — most recent first. See them on the map →
Current verdict: Normal. No official flood warning is active nearby and the closest river stations are within normal ranges.
Merton has river level monitoring on River Graveney, River Wandle — 4 monitoring stations in total.
Use the GOV.UK Check for Flooding service (check-for-flooding.service.gov.uk) or call Floodline on 0345 988 1188 (24 hours). You can also set up free FloodRadar email or browser alerts from any station page above.
Follow official advice: move valuables and vehicles to safety, never walk or drive through flood water, turn off gas and electricity if safe, and check on vulnerable neighbours. See our flood preparation guide at floodradar.co.uk/flood-help.
