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Does SW3 flood?

Yes — parts of the SW3 district carry real flood risk: 1 of its 47 at-risk postcodes reach the Environment Agency's High likelihood band. The SW3 postcode district covers Chelsea Riverside, Royal Hospital, close to Westminster, Barnes, Tower Pier, and surrounding villages in parts of Greater London and Surrey.

47 postcodes in the SW3 district appear in the Environment Agency's rivers-and-sea flood-risk dataset — worst bands: 1 high, 46 very low. A postcode not listed here has no properties in any recorded risk band (which is good news, but never proof it cannot flood).

Free preview first · full report £19

Which SW3 postcodes are at risk?

SW3 5RJ up to High SW3 4HS up to Very low SW3 4JA up to Very low SW3 4JB up to Very low SW3 4JD up to Very low SW3 4JE up to Very low SW3 4JG up to Very low SW3 4JH up to Very low SW3 4JJ up to Very low SW3 4JL up to Very low SW3 4JP up to Very low SW3 4LA up to Very low SW3 4LE up to Very low SW3 4LF up to Very low SW3 4LG up to Very low SW3 4LH up to Very low SW3 4LJ up to Very low SW3 4LL up to Very low SW3 4LQ up to Very low SW3 4LS up to Very low SW3 4LW up to Very low SW3 4SR up to Very low SW3 5AX up to Very low SW3 5DQ up to Very low SW3 5HH up to Very low SW3 5HJ up to Very low SW3 5HL up to Very low SW3 5HS up to Very low SW3 5HX up to Very low SW3 5LN up to Very low SW3 5LP up to Very low SW3 5LR up to Very low SW3 5LS up to Very low SW3 5LW up to Very low SW3 5LX up to Very low SW3 5NB up to Very low SW3 5QG up to Very low SW3 5QP up to Very low SW3 5QS up to Very low SW3 5QT up to Very low SW3 5QW up to Very low SW3 5QX up to Very low SW3 5QY up to Very low SW3 5QZ up to Very low SW3 5RA up to Very low SW3 5RB up to Very low SW3 5TJ up to Very low

Rivers and flooding history near SW3

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

1,142 official flood warnings and alerts have been raised within ~10 km of the district's centre since 2006 (3 at warning level or above), most recently 29 September 2026. Warnings cover flood areas, not individual addresses.

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

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

🏠 Buying or renting in SW3? 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

SW1A SW1E SW1H SW1P SW1V SW1W SW1X SW6

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.