Does Stevenage flood?

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

Ordnance Survey places 46 postcodes in Stevenage 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 546 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 Stevenage

Environment Agency gauges within 10 km of Stevenage watch Stevenage Brook, River Beane, River Mimram.

• Bragbury Park
  Stevenage Brook · 3.2 km away 0.13 m
  normal range · 29 min ago
• Walkern
  River Beane · 5.6 km away 0.12 m
  normal range · steady · 29 min ago
• Fulling Mill
  River Mimram · 6.2 km away 0.07 m
  normal range · steady · 29 min ago
• Whitwell
  River Mimram · 6.5 km away 0.06 m
  normal range · steady · 29 min ago
• Dane End
  River Beane · 8.8 km away 0.87 m
  normal range · steady · 29 min ago

Distances are from the middle of Stevenage'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 Stevenage

10 Environment Agency flood warning areas lie within 10 km of Stevenage. The EA has issued 26 flood warnings and alerts for them since 2006, most recently on 8 Jan 2026.

• The Stevenage Brook at Stevenage including Hooks Cross
  2 warnings and alerts since 2006, latest Jun 2021 2.4 km
• The River Beane at Walkern including Holbrook
  1 warning or alert since 2006, latest Feb 2014 3.9 km
• The River Beane catchment including the Stevenage Brook and the Dane End Tributary
  15 warnings and alerts since 2006, latest Jan 2026 5.4 km
• The River Mimram at Whitwell including Codicote
  no warning on record since 2006 6.2 km
• The River Mimram at Welwyn including Welwyn Garden City and Digswell
  no warning on record since 2006 7.3 km
• The River Mimram at Whitwell, Welwyn, Tewin, Hertingfordbury and Hertford
  3 warnings and alerts since 2006, latest Jan 2025 7.4 km
• Woolgrove Road, Green Lane, Purwell Lane, Brook View, Ninesprings Way and Oakfield Avenue in Hitchin, Stevenage Road in Ashbrook, Stevenage Road, Priory Lane and Elms Close in Little Wymondley, High Street and Church Lane in Graveley
  1 warning or alert since 2006, latest Sep 2024 7.4 km
• The River Beane at Watton-at-Stone to Waterford including Stapleford
  no warning on record since 2006 7.7 km
• Areas at risk of groundwater flooding in Kimpton and Lilley Bottom, including Lye Hill, Whiteway and Claggy Bottom
  4 warnings and alerts since 2006, latest Dec 2024 8.6 km
• The Dane End tributary at Dane End including Sacombe
  no warning on record since 2006 9.0 km

Recorded floods near Stevenage

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

• 17 Jul 2015 — ea06JulySummer2015 Main river
• 31 Jan 2014 — ea06FebruaryWinter2014 Main river
• 24 Dec 2013 — ea06DecemberWinter2013 Main river
• 1 Jan 1993 — 06OctoberAutumn1993 Main river
• 1 May 1992 — 06MaySpring1992 Main river
• 1 Jan 1978 — 06MaySpring1978 Main river
• 1 Jan 1968 — September 1968
• 1 Jan 1968 — 06SeptemberAutumn1968 Main river
• 1 Jan 1947 — 06MarchSpring1947 Main river

Rainfall near Stevenage

Stevenage gets about 658 mm of rain a year on average (wettest month October, 67 mm; driest March, 39 mm). That is 43% 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 (2.3 km away), recorded 3.2 mm in the last 24 hours and 51.1 mm in the last 7 days (latest reading 29 min ago).

At-risk postcodes in Stevenage

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

Medium likelihood (10)

Low likelihood (36)

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.