Does SN4 flood?

Yes — parts of the SN4 district carry real flood risk: 7 of its 26 at-risk postcodes reach the Environment Agency's High likelihood band. The SN4 postcode district covers Wroughton and Wichelstowe, Ridgeway, Royal Wootton Bassett South & West, Marlborough West, close to Swindon, Ogbourne, Haydon Wick, and surrounding villages in parts of Wiltshire and Swindon.

26 postcodes in the SN4 district appear in the Environment Agency's rivers-and-sea flood-risk dataset — worst bands: 7 high, 8 medium, 11 low. A postcode not listed here has no properties in any recorded risk band (which is good news, but never proof it cannot flood).

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Which SN4 postcodes are at risk?

Rivers and flooding history near SN4

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

Rushey Platt on the River Ray — 3.2 km away, highest on record 2.19m
Draycot Foliat on the Groundwater Level — 4.7 km away, highest on record 162.97m
Rodbourne on the River Ray — 5.3 km away, highest on record 2.46m
Lower Stratton on the River Cole — 6.5 km away, highest on record 4.30m

61 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 24 February 2026. Warnings cover flood areas, not individual addresses.

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

June 1971 flooding — about 2.7 km from the centre
September 1968 flooding — about 3.8 km from the centre

🏠 Buying or renting in SN4? 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

SN3 SN5 SN2 SN6 SN1 SN7 SN8 SN9

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.