Does SE3 flood?

Yes — parts of the SE3 district carry real flood risk: 10 of its 23 at-risk postcodes reach the Environment Agency's High likelihood band. The SE3 postcode district covers Kidbrooke Village & Sutcliffe, Blackheath, Blackheath Westcombe, close to Hither Green, Grove Park, Catford, and surrounding villages in Greater London.

23 postcodes in the SE3 district appear in the Environment Agency's rivers-and-sea flood-risk dataset — worst bands: 10 high, 5 medium, 3 low, 5 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 SE3 postcodes are at risk?

SE3 9AT up to High SE3 9DA up to High SE3 9DJ up to High SE3 9DS up to High SE3 9DU up to High SE3 9DW up to High SE3 9DY up to High SE3 9DZ up to High SE3 9HP up to High SE3 9HT up to High SE3 7DH up to Medium SE3 9DE up to Medium SE3 9DG up to Medium SE3 9DP up to Medium SE3 9GB up to Medium SE3 9BY up to Low SE3 9HH up to Low SE3 9HL up to Low SE3 9AD up to Very low SE3 9AG up to Very low SE3 9AJ up to Very low SE3 9ED up to Very low SE3 9NF up to Very low

Rivers and flooding history near SE3

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

Manor House Gardens on the River Quaggy — 0.7 km away, highest on record 1.08m
Chinbrook Park on the River Quaggy — 3.3 km away, highest on record 0.75m
Catford Hill on the River Ravensbourne — 3.5 km away, highest on record 1.20m
Winsford Road on the River Pool — 3.9 km away, highest on record 0.89m

314 official flood warnings and alerts have been raised within ~10 km of the district's centre since 2006 (17 at warning level or above), most recently 27 August 2026. Warnings cover flood areas, not individual addresses.

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

September 1968 flooding — about 2.3 km from the centre
November 1965 flooding — about 2.1 km from the centre

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

🏠 Buying or renting in SE3? 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

SE2 SE4 SE1 SE1P SE5 SE6 SE7 SE8

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.