Does Cley next the Sea flood?

What the Environment Agency's rivers-and-sea flood-risk data says about Cley next the Sea

Ordnance Survey places 29 postcodes in Cley next the Sea 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 205 properties in the EA dataset's likelihood bands.

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 Cley next the Sea

Environment Agency gauges within 10 km of Cley next the Sea watch River Glaven.

• Hunworth
  River Glaven · 7.9 km away 0.12 m
  below normal · steady · 32 min ago

Distances are from the middle of Cley next the Sea'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.

Flood warning areas near Cley next the Sea

9 Environment Agency flood warning areas lie within 10 km of Cley next the Sea. The EA has issued 227 flood warnings and alerts for them since 2006, most recently on 14 Aug 2026.

• The north Norfolk coast at Cley-next-the-Sea including Fresh Marshes, Wiveton and Glandford
  2 warnings and alerts since 2006, latest Jan 2017 0.6 km
• The north Norfolk coast at Blakeney
  3 warnings and alerts since 2006, latest Jan 2017 2.1 km
• The north Norfolk coast at east Cley and Salthouse, including parts of the A149 coast Road, Beach Road and surrounding marshland
  22 warnings and alerts since 2006, latest Mar 2025 2.1 km
• The north Norfolk coast at East Cley and Salthouse, including parts of the A149 coast Road, Beach Road and surrounding marshland
  133 warnings and alerts since 2006, latest Aug 2026 2.1 km
• The north Norfolk coast at Morston
  3 warnings and alerts since 2006, latest Jan 2017 4.1 km
• The River Glaven through Letheringsett
  3 warnings and alerts since 2006, latest Oct 2023 5.4 km
• The River Glaven through Hunworth, Thornage and Letheringsett
  30 warnings and alerts since 2006, latest May 2024 5.7 km
• The north Norfolk coast at Stiffkey
  2 warnings and alerts since 2006, latest Dec 2013 6.6 km
• The River Stiffkey from Fulmodeston to Warham, including Great Walsingham
  29 warnings and alerts since 2006, latest Feb 2024 9.3 km

Recorded floods near Cley next the Sea

Floods whose mapped extent (EA Recorded Flood Outlines) reached within ~5 km of Cley next the Sea, most recent first. Absence of a record does not mean a place has never flooded. See them on the map →

• 5 Dec 2013 — 2013 Flood Outline Sea
• 31 Jan 1953 — 1953 Coast Flood Outline Norfolk Sea

Rainfall near Cley next the Sea

The nearest rain gauge, Rainfall station (5.2 km away), recorded 1.8 mm in the last 24 hours and 9.5 mm in the last 7 days (latest reading 1 h ago).

At-risk postcodes in Cley next the Sea

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

High likelihood (3)

Medium likelihood (2)

Low likelihood (17)

Very low likelihood (7)

Postcode districts

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.