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Does Cowes flood?

Isle of Wight
54postcodes in the EA rivers-and-sea dataset
4river gauges within 10 km
4tidal gauges within 10 km
3years with a mapped flood record within 5 km
🏠 Thinking of buying in Cowes? Get the detailed Property Flood-Risk Report for any Cowes 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 Cowes

Ordnance Survey places 54 postcodes in Cowes 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 532 properties in the EA dataset's likelihood bands.

EA likelihood bandPostcodes (worst band)Properties in the EA datasetof which homes
High45417147
Medium34117
Low57026
Very low142
All bands54532192

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 Cowes

Environment Agency gauges within 10 km of Cowes watch Gurnard Luck, Lukely Brook, Brownwich Stream, River Alver.

Distances are from the middle of Cowes'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 Cowes

The nearest watercourse on the river map is the River Medina (tidal here), about 630 m from the middle of Cowes's at-risk postcodes.

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 the River Medina nearest the middle of Cowes'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 Cowes

17 Environment Agency flood warning areas lie within 10 km of Cowes. The EA has issued 297 flood warnings and alerts for them since 2006, most recently on 25 Oct 2026.

Recorded floods near Cowes

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

Rainfall near Cowes

Cowes gets about 813 mm of rain a year on average (wettest month November, 103 mm; driest July, 45 mm). That is 30% drier than the UK as a whole, which averages 1,163 mm a year. Source: Met Office HadUK-Grid 1991–2020 (5 km grid), 2.3 km from the place centre.

The nearest rain gauge, Rainfall station (0.7 km away), recorded 5.5 mm in the last 24 hours and 115.1 mm in the last 7 days (latest reading 25 min ago).

At-risk postcodes in Cowes

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

High likelihood (45)

PO31 7AJPO31 7ARPO31 7ASPO31 7ATPO31 7AWPO31 7AXPO31 7AYPO31 7BDPO31 7BQPO31 7BUPO31 7BXPO31 7DAPO31 7DDPO31 7DFPO31 7DUPO31 7DWPO31 7HTPO31 7LPPO31 7NUPO31 7PGPO31 7PQPO31 7QJPO31 7QSPO31 7QTPO31 7RRPO31 7RSPO31 7RTPO31 7RXPO31 7RYPO31 7RZPO31 7SAPO31 7TAPO31 7TDPO31 7TXPO31 7XBPO31 7XFPO31 7XJPO31 8AUPO31 8BPPO31 8BSPO31 8HXPO31 8JQPO31 8LDPO31 8LEPO31 8LL

Medium likelihood (3)

PO31 7BHPO31 7SUPO31 8BZ

Low likelihood (5)

PO31 7BEPO31 7DJPO31 7PBPO31 7RJPO31 8BW

Very low likelihood (1)

PO31 7QH

Postcode districts

PO31 · 54

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