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Does SN9 flood?

Yes — parts of the SN9 district carry real flood risk: 26 of its 43 at-risk postcodes reach the Environment Agency's High likelihood band. The SN9 postcode district covers Pewsey, Pewsey Vale West, Avon Valley, close to Rushall, Upavon, Marlborough, and surrounding villages in Wiltshire.

43 postcodes in the SN9 district appear in the Environment Agency's rivers-and-sea flood-risk dataset — worst bands: 26 high, 5 medium, 12 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 SN9 postcodes are at risk?

SN9 5AA up to High SN9 5AD up to High SN9 5AF up to High SN9 5AQ up to High SN9 5DG up to High SN9 5DH up to High SN9 5DJ up to High SN9 5DL up to High SN9 5DN up to High SN9 5DW up to High SN9 5ES up to High SN9 5EX up to High SN9 5FA up to High SN9 5HJ up to High SN9 5NT up to High SN9 5NY up to High SN9 5PA up to High SN9 5PZ up to High SN9 6AG up to High SN9 6AW up to High SN9 6DD up to High SN9 6EA up to High SN9 6EB up to High SN9 6EN up to High SN9 6LA up to High SN9 6NR up to High SN9 5AG up to Medium SN9 5JX up to Medium SN9 6AQ up to Medium SN9 6AR up to Medium SN9 6JZ up to Medium SN9 5DB up to Low SN9 5HS up to Low SN9 5JF up to Low SN9 5LD up to Low SN9 5LQ up to Low SN9 5NU up to Low SN9 6BB up to Low SN9 6DE up to Low SN9 6DQ up to Low SN9 6EU up to Low SN9 6FA up to Low SN9 6JW up to Low

Rivers and flooding history near SN9

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

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

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

🏠 Buying or renting in SN9? 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

SN10 SN8 SN11 SN7 SN12 SN6 SN13 SN5

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.