Does Erith flood?

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

Ordnance Survey places 52 postcodes in Erith 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 934 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 Erith

Environment Agency gauges within 10 km of Erith watch River Cray, Shuttle Tributary Cray, River Beam, River Darent, Thames Tideway, River Ingrebourne.

• Crayford
  River Cray · 3.9 km away 0.18 mASD
  normal range · steady · 35 min ago
• Hall Place
  River Cray · 4.5 km away 0.02 mASD
  normal range · steady · 35 min ago
• Lamorbey Park
  Shuttle Tributary Cray · 6.4 km away -1.44 mASD
  below normal · steady · 35 min ago
• Hornchurch_Bretons Farm
  River Beam · 6.9 km away 0.10 mASD
  normal range · steady · 35 min ago
• Hawley
  River Darent · 7.9 km away 0.05 mASD
  normal range · steady · 35 min ago
• Silvertown Tidal
  Thames Tideway · 8.3 km away 0.67 mAOD
  rises and falls with the tide · 35 min ago
• Gaynes Park Structure
  River Ingrebourne · 8.8 km away 0.10 mASD
  controlled by a sluice or weir · 35 min ago

Distances are from the middle of Erith'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 Erith

26 Environment Agency flood warning areas lie within 10 km of Erith. The EA has issued 221 flood warnings and alerts for them since 2006, most recently on 27 Aug 2026.

• River Thames from Dartford Creek to Erith High Street East including the Darent Industrial Estate, Slade Green and the Church Industrial Estate 2.2 km
• River Thames riverside from Dartford Creek and The Mardyke to the Thames Barrier
  27 warnings and alerts since 2006, latest Apr 2024 2.6 km
• River Thames from The Mardyke to Barking Creek including Rainham Marshes, South Hornchurch, Ford Motor Works, Creekmouth, the New England Estate and South Barking 3.0 km
• The River Thames from Erith High Street to Woolwich Arsenal including Erith Marshes, Thamesmead, Abbey Wood, North Plumstead and the Woolwich Arsenal site. 3.4 km
• Areas at risk of tidal flooding in Dartford 4.1 km
• River Thames including areas in the boroughs of Bexley and Greenwich
  2 warnings and alerts since 2006, latest Feb 2008 4.4 km
• The River Beam at Dagenham including Rainham 4.4 km
• River Darent in Hawley, the Dartford Trade Park, Brooklands, Dartford Town Centre, Dartford and Crayford Marshes to the River Thames including Slade Green and the Darent Industrial Park
  3 warnings and alerts since 2006, latest Feb 2014 4.7 km
• River Thames including areas in the boroughs of Havering, Barking and Dagenham, and Newham
  2 warnings and alerts since 2006, latest Feb 2008 4.8 km
• Areas at risk of tidal flooding in Dartford, Crayford and Greenhithe 4.9 km
• River Shuttle at Blackfen, Sidcup Golf Course, Lamorbey Park, Sidcup and Old Bexley to Hall Place
  2 warnings and alerts since 2006, latest Jun 2016 5.5 km
• River Cray from St Mary's Cray to Crayford, including Hall Place and the River Shuttle from Blackfen through Sidcup to Old Bexley including Lamorbey Park
  58 warnings and alerts since 2006, latest Jun 2026 5.7 km

Recorded floods near Erith

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

• 29 Jan 2021 — ea06JanuaryWinter2021
• 29 May 2018 — ea06MaySpring2018 Ordinary watercourse
• 23 Jun 2016 — ea06JuneSummer2016
• 31 Jan 2014 — ea06FebruaryWinter2014 Main river
• 14 Feb 2007 — 06FebruaryWinter2007 Main river
• 23 Dec 2002 — 06JanuaryNewYear2003 Main river
• 1 Jan 2000 — 06DecemberWinter2000 Main river
• 27 Aug 1977 — 07337E300_AUG1977_River Cray_Old Bexley/St Mary's Main river
• 1 Jan 1974 — 06NovemberAutumn1974 Main river
• 14 Sep 1968 — 07337E200_SEPT1968_Darent_Dartford Main river
• 14 Sep 1968 — 07337E200_SEPT1968_Cray_Dartford Main river
• 12 Jan 1968 — 1968 September Flood Outline Main river

…and 7 earlier recorded floods on the map.

Rainfall near Erith

The nearest rain gauge, Rainfall station (3.5 km away), recorded 0.2 mm in the last 24 hours and 24.6 mm in the last 7 days (latest reading 2 h ago).

At-risk postcodes in Erith

Every postcode Ordnance Survey places in Erith 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 (3)

Low likelihood (7)

Very low likelihood (39)

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.