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Does Copthorne flood?

West Sussex
20postcodes in the EA rivers-and-sea dataset
12river gauges within 10 km
8years with a mapped flood record within 5 km
🏠 Thinking of buying in Copthorne? Get the detailed Property Flood-Risk Report for any Copthorne postcode — official risk band, recorded floods since 1703, warning history, river behaviour and nearby storm overflows. £19 one-off, instant. Learn more →

What the Environment Agency's rivers-and-sea flood-risk data says about Copthorne

Ordnance Survey places 20 postcodes in Copthorne in the Environment Agency's rivers-and-sea flood-risk dataset (Risk of Flooding from Rivers and Sea). Each postcode is counted once, under the worst band any of its properties reaches; together they hold 203 properties in the EA dataset's likelihood bands.

EA likelihood bandPostcodes (worst band)Properties in the EA datasetof which homes
High93431
Medium44846
Low7121114
Very low000
All bands20203191

This dataset covers flooding from rivers and the sea only — one of five flood sources. Surface water, groundwater, sewers and reservoirs are assessed separately, so a postcode missing from it is not proof that a place cannot flood. The band describes the land around properties (allowing for defences), not any single address and not today's conditions.

Rivers and live river levels near Copthorne

Environment Agency gauges within 10 km of Copthorne watch Burstow Stream, Gatwick Stream, River Mole, Ifield Brook, Salfords Stream, Eden Tributary Medway.

Distances are from the middle of Copthorne's at-risk postcodes. Tidal and structure gauges are shown as readings only — the tide and sluice gates move them, not floods. A gauge with no recent reading shows no level.

The watercourse nearest Copthorne

The nearest watercourse on the river map is Copthorne Brook, about 70 m from the middle of Copthorne's at-risk postcodes. It flows into Burstow Stream about 1.2 km downstream.

A gauge downstream shows water that has already passed this point; one upstream sees it first. Distances along the river are from the point on Copthorne Brook nearest the middle of Copthorne's at-risk postcodes. From Ordnance Survey’s river map (OS Open Rivers), which leaves out small streams, ditches and culverts, so a nearer one may exist. This describes where water goes on the map; it says nothing about flooding at any address. Contains OS data © Crown copyright and database rights 2026.

Flood warning areas near Copthorne

13 Environment Agency flood warning areas lie within 10 km of Copthorne. The EA has issued 177 flood warnings and alerts for them since 2006, most recently on 23 Oct 2026.

Recorded floods near Copthorne

Floods whose mapped extent (EA Recorded Flood Outlines) reached within ~5 km of Copthorne, most recent first. Records, not floods: no outline on the record is not evidence a place has not flooded. See them on the map →

…and 5 earlier recorded floods on the map.

Rainfall near Copthorne

Copthorne gets about 873 mm of rain a year on average (wettest month December, 103 mm; driest June, 50 mm). That is 25% drier than the UK as a whole, which averages 1,163 mm a year. Source: Met Office HadUK-Grid 1991–2020 (5 km grid), 2.1 km from the place centre.

The nearest rain gauge, Rainfall station (4.7 km away), recorded 2.7 mm in the last 24 hours and 67.0 mm in the last 7 days (latest reading 38 min ago).

At-risk postcodes in Copthorne

Every postcode Ordnance Survey places in Copthorne that appears in the EA's rivers-and-sea dataset, worst band first. Each links to its own flood-risk page.

High likelihood (9)

RH10 3LXRH10 3PJRH10 3PLRH10 3QJRH10 3QQRH10 3RBRH10 3RDRH10 3RHRH10 3RZ

Medium likelihood (4)

RH10 3LPRH10 3LWRH10 3LYRH10 3NX

Low likelihood (7)

RH10 3BFRH10 3PERH10 3PGRH10 3QSRH10 3QWRH10 3SLRH10 3XD

Postcode districts

RH10 · 20

Sources

FloodRadar summarises public flood data. It is not a flood-risk survey of any property, and it does not replace official GOV.UK flood warnings or the GOV.UK long-term flood risk service.

Flood-risk bands: © 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.

Recorded Flood Outlines, flood warning areas and warning history © Environment Agency copyright and/or database right 2025. Licensed under the Open Government Licence v3.0.

River levels and rainfall: Environment Agency real-time flood-monitoring data, updated every 15 minutes (Open Government Licence v3.0).

Average rainfall: HadUK-Grid v1.3.2, Met Office. Contains public sector information licensed under the Open Government Licence v3.0.

Place names: Contains OS data © Crown copyright and database rights 2026. Contains Royal Mail data © Royal Mail copyright and database right 2026. Contains National Statistics data © Crown copyright and database right 2026. Licensed under the Open Government Licence v3.0.

All data sources & licences