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Does BN27 flood?

Yes — parts of the BN27 district carry real flood risk: 18 of its 43 at-risk postcodes reach the Environment Agency's High likelihood band. The BN27 postcode district covers Hellingly, Herstmonceux & Pevensey Levels, Hailsham East, Hailsham North West, close to Lealands, Cowbeech, Pevensey Bay, and surrounding villages in East Sussex.

43 postcodes in the BN27 district appear in the Environment Agency's rivers-and-sea flood-risk dataset — worst bands: 18 high, 11 medium, 12 low, 2 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 BN27 postcodes are at risk?

BN27 1PG up to High BN27 1PQ up to High BN27 1QD up to High BN27 1SF up to High BN27 3BE up to High BN27 3GL up to High BN27 3PZ up to High BN27 3QS up to High BN27 3UU up to High BN27 4EW up to High BN27 4EX up to High BN27 4EY up to High BN27 4FS up to High BN27 4HD up to High BN27 4HL up to High BN27 4JL up to High BN27 4JN up to High BN27 4TQ up to High BN27 1PH up to Medium BN27 1QB up to Medium BN27 1QF up to Medium BN27 1QG up to Medium BN27 1SB up to Medium BN27 2RP up to Medium BN27 3PR up to Medium BN27 4AT up to Medium BN27 4DH up to Medium BN27 4DN up to Medium BN27 4HH up to Medium BN27 1SA up to Low BN27 1SD up to Low BN27 1SE up to Low BN27 2RN up to Low BN27 3FT up to Low BN27 3RJ up to Low BN27 3SX up to Low BN27 4DL up to Low BN27 4EQ up to Low BN27 4EU up to Low BN27 4QR up to Low BN27 4UA up to Low BN27 2RS up to Very low BN27 2SD up to Very low

Rivers and flooding history near BN27

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

317 official flood warnings and alerts have been raised within ~10 km of the district's centre since 2006 (51 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):

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

🏠 Buying or renting in BN27? 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

BN26 BN25 BN24 BN23 BN22 BN21 BN20 BN18

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.