Does BN21 flood?

Yes — parts of the BN21 district carry real flood risk: 3 of its 11 at-risk postcodes reach the Environment Agency's High likelihood band. The BN21 postcode district covers Devonshire, Upperton, Ratton, Meads, close to Eastbourne Harbour, Pevensey Bay, and surrounding villages in East Sussex.

11 postcodes in the BN21 district appear in the Environment Agency's rivers-and-sea flood-risk dataset — worst bands: 3 high, 8 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 BN21 postcodes are at risk?

BN21 3DX up to High BN21 3DY up to High BN21 3EL up to High BN21 2BH up to Very low BN21 2UF up to Very low BN21 3AD up to Very low BN21 3DW up to Very low BN21 3ET up to Very low BN21 3EY up to Very low BN21 3PG up to Very low BN21 4DL up to Very low

Rivers and flooding history near BN21

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

SHERMAN BRIDGE GS — 10 km away
Hellingly on the River Bull — 13.4 km away, highest on record 3.02m
Leabridge on the River Bull — 14.2 km away, highest on record 2.57m
TILLEY BRIDGE GS — 14.3 km away

149 official flood warnings and alerts have been raised within ~10 km of the district's centre since 2006 (39 at warning level or above), most recently 26 August 2026. Warnings cover flood areas, not individual addresses.

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

07418K402FEO_DEC2009_Polegate_Willingdon (2009) — about 2.5 km from the centre
07418K421FEO_JUL1980_LottbridgeSewer (1980) — about 1.8 km from the centre
07418NoRefFEO_JUL1980_Eastbourne (1980) — about 0.8 km from the centre
07418K418FEO_NOV1974_Langney (1974) — about 3.6 km from the centre

Records, not floods: no outline on the record is not evidence a place has not flooded.

🏠 Buying or renting in BN21? 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

BN20 BN22 BN23 BN18 BN24 BN17 BN25 BN16

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.