Does NW9 flood?

Yes — parts of the NW9 district carry real flood risk: 23 of its 77 at-risk postcodes reach the Environment Agency's High likelihood band. The NW9 postcode district covers Colindale South, West Hendon, Burnt Oak, Welsh Harp, close to Hendon, Edgware, Golders Green, and surrounding villages in parts of Greater London and Hertfordshire.

77 postcodes in the NW9 district appear in the Environment Agency's rivers-and-sea flood-risk dataset — worst bands: 23 high, 26 medium, 26 low, 2 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 NW9 postcodes are at risk?

NW9 5AB up to High NW9 5AP up to High NW9 5AT up to High NW9 5BG up to High NW9 5BY up to High NW9 5EE up to High NW9 5EF up to High NW9 5EG up to High NW9 5EL up to High NW9 5EP up to High NW9 5ES up to High NW9 5ET up to High NW9 5EY up to High NW9 6DE up to High NW9 6DF up to High NW9 6DG up to High NW9 6DH up to High NW9 6DQ up to High NW9 6DX up to High NW9 6RE up to High NW9 6RZ up to High NW9 7BW up to High NW9 8SB up to High NW9 5AR up to Medium NW9 5AS up to Medium NW9 5AU up to Medium NW9 5EH up to Medium NW9 5EU up to Medium NW9 5EX up to Medium NW9 5HB up to Medium NW9 6BY up to Medium NW9 6DJ up to Medium NW9 6DL up to Medium NW9 6DU up to Medium NW9 6DY up to Medium NW9 6EB up to Medium NW9 6EJ up to Medium NW9 6JL up to Medium NW9 6JP up to Medium NW9 6QA up to Medium NW9 6QB up to Medium NW9 6QD up to Medium NW9 6QJ up to Medium NW9 6RA up to Medium NW9 6RB up to Medium NW9 6RD up to Medium NW9 6RY up to Medium NW9 7EZ up to Medium NW9 8SA up to Medium NW9 5AX up to Low NW9 5AY up to Low NW9 5BU up to Low NW9 5BX up to Low NW9 5DA up to Low NW9 5DY up to Low NW9 5ED up to Low NW9 5RJ up to Low NW9 6DA up to Low NW9 6DD up to Low NW9 6ED up to Low NW9 6EP up to Low NW9 6ER up to Low NW9 6FR up to Low NW9 6FZ up to Low NW9 6HA up to Low NW9 6JE up to Low NW9 6JX up to Low NW9 6PB up to Low NW9 6RG up to Low NW9 6RJ up to Low NW9 7BY up to Low NW9 7DN up to Low NW9 7TH up to Low NW9 8RX up to Low NW9 8SD up to Low NW9 6EA up to Very low NW9 6EL up to Very low

Rivers and flooding history near NW9

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

193 official flood warnings and alerts have been raised within ~10 km of the district's centre since 2006 (16 at warning level or above), most recently 28 August 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 NW9? 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

NW10 NW11 NW7 NW4 NW2

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.