Does CT18 flood?

Yes — parts of the CT18 district carry real flood risk: 2 of its 5 at-risk postcodes reach the Environment Agency's High likelihood band. The CT18 postcode district covers North Downs West, Alkham & Capel-le-Ferne, North Downs East, close to Folkestone, Sellindge, Aldington, and surrounding villages in Kent.

5 postcodes in the CT18 district appear in the Environment Agency's rivers-and-sea flood-risk dataset — worst bands: 2 high, 2 medium, 1 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 CT18 postcodes are at risk?

CT18 8HP up to High CT18 8HT up to High CT18 8EE up to Medium CT18 8EF up to Medium CT18 8AT up to Low

Rivers and flooding history near CT18

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

North Elham on the Groundwater Level — 4.3 km away, highest on record 79.50m
Black Bull Road on the Pent Stream — 6.1 km away, highest on record 0.77m
Sellindge on the East Stour Trib Great Stour — 7.7 km away, highest on record 1.98m
Upper Petham Bourne on the Groundwater Level — 8.6 km away, highest on record 87.22m

8 official flood warnings and alerts have been raised within ~10 km of the district's centre since 2006, most recently 6 July 2025. Warnings cover flood areas, not individual addresses.

No recorded flood extent is mapped near this district's centre. No recorded outline near the district means no flood was mapped here, which is not evidence none happened: the Environment Agency mapped only some floods, mapping effort rose sharply after about 2000, and surface-water flooding is largely absent from this record.

🏠 Buying or renting in CT18? 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

CT17 CT19 CT16 CT20 CT15 CT21 CT14 CT13

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.