Does SL5 flood?

Yes — parts of the SL5 district carry real flood risk: 37 of its 59 at-risk postcodes reach the Environment Agency's High likelihood band. The SL5 postcode district covers Ascot & Sunninghill, Winkfield & Warfield East, Sunningdale & Cheapside, Swinley Forest, close to Bagshot, Warfield, Virginia Water, and surrounding villages in parts of Surrey and Windsor and Maidenhead.

59 postcodes in the SL5 district appear in the Environment Agency's rivers-and-sea flood-risk dataset — worst bands: 37 high, 3 medium, 19 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 SL5 postcodes are at risk?

SL5 7DH up to High SL5 7DJ up to High SL5 7LX up to High SL5 7NW up to High SL5 7NX up to High SL5 7NY up to High SL5 7PD up to High SL5 7PJ up to High SL5 7QE up to High SL5 7QL up to High SL5 7RF up to High SL5 7RP up to High SL5 7RU up to High SL5 7SQ up to High SL5 8NZ up to High SL5 8PA up to High SL5 8PF up to High SL5 8PG up to High SL5 8PP up to High SL5 8PR up to High SL5 8PX up to High SL5 8PY up to High SL5 8PZ up to High SL5 8QA up to High SL5 8QB up to High SL5 8QD up to High SL5 8QF up to High SL5 8QH up to High SL5 8QN up to High SL5 8QQ up to High SL5 8QS up to High SL5 8QU up to High SL5 9AG up to High SL5 9BL up to High SL5 9HJ up to High SL5 9HW up to High SL5 9LU up to High SL5 8FU up to Medium SL5 8TE up to Medium SL5 9SJ up to Medium SL5 0PU up to Low SL5 7DL up to Low SL5 7DQ up to Low SL5 7QP up to Low SL5 8NA up to Low SL5 8NQ up to Low SL5 8QT up to Low SL5 9BH up to Low SL5 9BJ up to Low SL5 9BN up to Low SL5 9BQ up to Low SL5 9QD up to Low SL5 9QQ up to Low SL5 9QS up to Low SL5 9QT up to Low SL5 9RA up to Low SL5 9RD up to Low SL5 9RE up to Low SL5 9RY up to Low

Rivers and flooding history near SL5

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

256 official flood warnings and alerts have been raised within ~10 km of the district's centre since 2006 (50 at warning level or above), most recently 14 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 SL5? 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

SL4 SL6 SL3 SL7 SL2 SL8 SL1 SL9

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.