Does Barnet flood?

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

Ordnance Survey places 37 postcodes in Barnet 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 357 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 Barnet

Environment Agency gauges within 10 km of Barnet watch Pymmes Brook, Dollis Brook, Salmon Brook, Mutton Brook, Deans Brook, Mimmshall Brook, Silk Stream.

• New Barnet
  Pymmes Brook · 0.7 km away 0.13 mASD
  normal range · steady · 31 min ago
• Whetstone
  Dollis Brook · 2.6 km away 0.01 mASD
  below normal · steady · 31 min ago
• North Finchley
  Dollis Brook · 3.6 km away 0.26 mASD
  normal range · steady · 31 min ago
• Arnos Park Structure
  Pymmes Brook · 4.3 km away 2.60 mASD
  controlled by a sluice or weir · 1 h ago
• Powys Lane
  Pymmes Brook · 4.7 km away 0.64 mASD
  below normal · steady · 31 min ago
• Enfield, The Chine
  Salmon Brook · 5.2 km away 0.96 mASD
  normal range · steady · 1 h ago
• Hampstead Suburb
  Mutton Brook · 6.7 km away 0.82 mASD
  normal range · steady · 31 min ago
• Edgware, Deans Brook
  Deans Brook · 7.3 km away 0.80 mASD
  normal range · steady · 31 min ago
• Mimmshall Brook
  Mimmshall Brook · 7.7 km away 0.26 mASD
  normal range · steady · 31 min ago
• Edmonton Green
  Salmon Brook · 7.8 km away 0.07 mASD
  normal range · steady · 31 min ago
• Colindale Structure
  Silk Stream · 7.9 km away 0.14 mASD
  controlled by a sluice or weir · 31 min ago
• Edmonton, Silver Street
  Pymmes Brook · 7.9 km away 0.05 mASD
  normal range · steady · 31 min ago

Distances are from the middle of Barnet'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 Barnet

16 Environment Agency flood warning areas lie within 10 km of Barnet. The EA has issued 223 flood warnings and alerts for them since 2006, most recently on 27 Aug 2026.

• The Pymmes Brook at East Barnet including Cockfosters and New Southgate 2.5 km
• The Dollis Brook from Barnet to Hendon including Whetstone and Finchley 4.0 km
• The Pymmes Brook from Bowes Park to Edmonton 5.9 km
• The Lower Lee tributaries, including the Nazeing Brook, Ching Brook, Cobbins Brook, Pymmes Brook, Rags Brook, Salmons Brook, Turkey Brook, Trinity Marsh Ditch and the Small River Lee
  122 warnings and alerts since 2006, latest Aug 2026 6.4 km
• The Mutton Brook at Hampstead Garden Suburb 6.6 km
• The Mimmshall Brook at Warrengate Road including South Mimms, Potters Bar, Brookmans Park and Welham Green
  10 warnings and alerts since 2006, latest Mar 2024 6.8 km
• The Deans Brook at Edgware 7.1 km
• The Turkey Brook at Enfield including Clay Hill 7.6 km
• The Silk Stream at Edgware and Colindale
  4 warnings and alerts since 2006, latest Jul 2025 8.2 km
• The Silk Stream and the Deans, Edgware, Dollis, Mutton, Wembley and Wealdstone Brooks and their tributaries
  85 warnings and alerts since 2006, latest Aug 2026 8.2 km
• The Salmons Brook at Grange Park and Lower Edmonton including World's End 8.2 km
• The Mimmshall Brook at Warrengate Road including Water End 8.4 km

Recorded floods near Barnet

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

• 11 Jun 2012 — ea06JuneSummer2012 Main river
• 1 Jan 1993 — 06OctoberAutumn1993 Main river
• 1 Jan 1992 — 06SeptemberAutumn1992 Main river
• 1 Jan 1987 — 06JulySummer1987 Main river
• 1 Jan 1981 — 06DecemberWinter1981 Main river
• 1 Jan 1980 — 06JulySummer1980 Main river
• 1 Dec 1964 — 06JulySumer1964 Main river
• 1 Dec 1964 — 06JulySummer1964 Main river
• 1 Jan 1947 — 06MarchSpring1947 Main river

Rainfall near Barnet

The nearest rain gauge, Rainfall station (7.4 km away), recorded 3.4 mm in the last 24 hours and 15.8 mm in the last 7 days (latest reading 46 min ago).

At-risk postcodes in Barnet

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

High likelihood (13)

Medium likelihood (8)

Low likelihood (16)

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.