Does SN12 flood?

Yes — parts of the SN12 district carry real flood risk: 20 of its 69 at-risk postcodes reach the Environment Agency's High likelihood band. The SN12 postcode district sits close to Melksham, Semington, Corsham and surrounding villages in parts of Wiltshire and Somerset.

69 postcodes in the SN12 district appear in the Environment Agency's rivers-and-sea flood-risk dataset — worst bands: 20 high, 8 medium, 41 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 SN12 postcodes are at risk?

SN12 7AQ up to High SN12 7JW up to High SN12 7RB up to High SN12 7RD up to High SN12 7RE up to High SN12 7RF up to High SN12 8BU up to High SN12 8DS up to High SN12 8DT up to High SN12 8DU up to High SN12 8EG up to High SN12 8HH up to High SN12 8HJ up to High SN12 8NN up to High SN12 8NY up to High SN12 8PA up to High SN12 8PL up to High SN12 8PS up to High SN12 8PX up to High SN12 8PY up to High SN12 6LP up to Medium SN12 6PP up to Medium SN12 8AA up to Medium SN12 8AD up to Medium SN12 8BS up to Medium SN12 8BT up to Medium SN12 8DA up to Medium SN12 8LH up to Medium SN12 6BG up to Low SN12 6EL up to Low SN12 6GD up to Low SN12 6LL up to Low SN12 6LN up to Low SN12 6LX up to Low SN12 6LY up to Low SN12 6PW up to Low SN12 7DT up to Low SN12 7DU up to Low SN12 7EB up to Low SN12 7ED up to Low SN12 7FS up to Low SN12 7FT up to Low SN12 7GS up to Low SN12 7JJ up to Low SN12 7LG up to Low SN12 7LQ up to Low SN12 7LS up to Low SN12 7LU up to Low SN12 7NG up to Low SN12 7NJ up to Low SN12 7NQ up to Low SN12 7PA up to Low SN12 7PR up to Low SN12 7QF up to Low SN12 7RU up to Low SN12 8AB up to Low SN12 8AJ up to Low SN12 8BP up to Low SN12 8BW up to Low SN12 8BX up to Low SN12 8DD up to Low SN12 8DF up to Low SN12 8DG up to Low SN12 8DR up to Low SN12 8DX up to Low SN12 8EB up to Low SN12 8LL up to Low SN12 8LQ up to Low SN12 8NR up to Low

Rivers and flooding history near SN12

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

286 official flood warnings and alerts have been raised within ~10 km of the district's centre since 2006 (75 at warning level or above), most recently 1 March 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 SN12? 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

SN11 SN13 SN10 SN14 SN15 SN9 SN16 SN8

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.