Does RH18 flood?

Yes — parts of the RH18 district carry real flood risk: 13 of its 31 at-risk postcodes reach the Environment Agency's High likelihood band. The RH18 postcode district covers Forest Row, Hartfield, Danehill & Fletching, close to Withyham, Lingfield, Groombridge, and surrounding villages in parts of Kent and West Sussex.

31 postcodes in the RH18 district appear in the Environment Agency's rivers-and-sea flood-risk dataset — worst bands: 13 high, 7 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).

Free preview first · full report £19

Which RH18 postcodes are at risk?

Rivers and flooding history near RH18

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

Forest Row on the River Medway — 1 km away, highest on record 2.26m
Summerford Bridge on the River Medway — 7.2 km away, highest on record 3.19m
Lingfield Eden Brook on the Eden Tributary Medway — 8.9 km away, highest on record 2.90m
Hendal Bridge on the Eridge Stream Tributary Medway — 9.5 km away, highest on record 2.35m

139 official flood warnings and alerts have been raised within ~10 km of the district's centre since 2006 (24 at warning level or above), most recently 18 February 2026. Warnings cover flood areas, not individual addresses.

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

07302C200_Dec2013_Medway_Eden_Teise_Beult (2013) — about 27.1 km from the centre
07304C200_JUL2007_Medway_Forest Row1 (2007) — about 0.5 km from the centre
07304C200_JUL2007_Medway_Forest Row2 (2007) — about 0.9 km from the centre
07304C200_JUL2007_Medway_Marsh Green & Newbridge (2007) — about 3.7 km from the centre

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

🏠 Buying or renting in RH18? 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

RH17 RH19 RH16 RH20 RH15 RH14 RH13 RH12

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.