Does SM5 flood?

Yes — parts of the SM5 district carry real flood risk: 4 of its 24 at-risk postcodes reach the Environment Agency's High likelihood band. The SM5 postcode district covers The Wrythe, Hackbridge, St Helier East, close to Carshalton, Beddington, North Cheam, and surrounding villages in parts of England and Surrey.

24 postcodes in the SM5 district appear in the Environment Agency's rivers-and-sea flood-risk dataset — worst bands: 4 high, 1 medium, 19 low. A postcode not listed here has no properties in any recorded risk band (which is good news, but never proof it cannot flood).

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Which SM5 postcodes are at risk?

Rivers and flooding history near SM5

The rivers that matter here, each monitored live on FloodRadar:

Hackbridge on the River Wandle — 0.2 km away, highest on record 2.04m
Carshalton Ponds on the River Wandle — 1.2 km away, highest on record 0.57m
Beddington Park on the River Wandle — 1.7 km away, highest on record 1.83m
Waddon Ponds on the River Wandle — 3 km away, highest on record 0.43m

172 official flood warnings and alerts have been raised within ~10 km of the district's centre since 2006 (9 at warning level or above), most recently 18 July 2025. Warnings cover flood areas, not individual addresses.

Recorded flood extents near the district (Environment Agency record):

September 1968 flooding — about 2.4 km from the centre

Records, not floods: no outline on the record is not evidence a place has not flooded.

🏠 Buying or renting in SM5? The full property flood-risk report covers any postcode here — the official likelihood band, every recorded flood nearby with distances, warning history year by year, how the local rivers behave, and an insurance outlook, print-ready for £19. See what's in the report →

Flood risk in nearby postcode districts

SM4 SM6 SM3 SM1

Band = the worst likelihood band of any property in that postcode (EA Risk of Flooding from Rivers & Sea, defence-adjusted, area-level). Check any postcode in detail — or get the full £19 property report — at the property flood-risk report. © Environment Agency copyright and/or database right 2025. All rights reserved. Some features of this map are based on digital spatial data from the Centre for Ecology & Hydrology, © NERC (CEH). © Crown Copyright and Database Rights 2025 OS AC0000807064. This product is produced in part from PAF® and Multiple Residence Data, the copyright in which is owned by Royal Mail Group Limited and/or Royal Mail Group plc. All rights reserved. Licence number AC0000807064.