Does Alconbury flood?

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

Ordnance Survey places 21 postcodes in Alconbury 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 173 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 Alconbury

Environment Agency gauges within 10 km of Alconbury watch Alconbury Brook, Brampton Brook, River Great Ouse, Bury Brook.

• Alconbury Weston
  Alconbury Brook · 1.4 km away 0.17 m
  normal range · steady · 27 min ago
• Brampton Racecourse
  Alconbury Brook · 4.5 km away 0.08 m
  normal range · steady · 27 min ago
• Brampton
  Brampton Brook · 5.4 km away 9.16 m
  normal range · steady · 27 min ago
• Brampton Sluice Structure
  River Great Ouse · 6.3 km away 0.12 m
  controlled by a sluice or weir · 2 h ago
• Kings Ripton
  Bury Brook · 7.5 km away 0.16 m
  normal range · steady · 27 min ago
• Godmanchester
  River Great Ouse · 7.7 km away No recent reading
  last reported 10 Nov 2026 14:00
• Hamerton
  Alconbury Brook · 9.4 km away 1.02 m
  normal range · steady · 27 min ago

Distances are from the middle of Alconbury'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 Alconbury

10 Environment Agency flood warning areas lie within 10 km of Alconbury. The EA has issued 47 flood warnings and alerts for them since 2006, most recently on 1 Mar 2026.

• Alconbury Brook at Hamerton, The Alconburys, Little Stukeley and Brampton
  29 warnings and alerts since 2006, latest Mar 2026 1.4 km
• Hamerton Road, Willow Farm Close, Spires End, High Street and North Road in Alconbury Weston, Great North Road, Mill Road, Brookside, Sharps Lane, High Street and Rusts Lane in Alconbury, Low Road in Little Stukeley, Thrapston Road in Brampton
  9 warnings and alerts since 2006, latest Jan 2024 1.6 km
• High Street in Spaldwick, Thrapston Road in Easton and Thrapston Road and Grove Lane in Ellington
  4 warnings and alerts since 2006, latest Jan 2021 4.0 km
• Elizabethan Way, Centenary Way, Layton Crescent, Lenton Close, Hawkes End, Park Road, North Road, Buckden Road, Allens Orchard, St Georges Close, River Lane, Central Avenue and Badger Way in Brampton
  no warning on record since 2006 5.5 km
• Berry Lane in Godmanchester and Bromholme Lane in Brampton
  no warning on record since 2006 6.5 km
• Berry Lane, West Street, The Causeway, St Anns Lane, Cambridge Street, Earning Street, Fairey Avenue, The Close, Tudor Road, Cambridge Road, White Hart Lane, Anderson Crescent, Orchard Way, Chadley Lane, Post Street, and The Avenue in Godmanchester
  no warning on record since 2006 7.7 km
• Waters Meet, Temple Close, Hartford Road, Tennis Court Avenue, Nursery Road and Brookside in Huntington, Main Street, Church Lane, The Grove and Old Houghton Road in Hartford
  2 warnings and alerts since 2006, latest Sep 2024 7.7 km
• Cambridge Road, Cambridge Street, Meadow Way, Almond Close, Rectory Gardens, Fox Grove, Lancaster Way, East Chadley Lane, Orchard Way, Linden Grove, Pavilion Close, Park Lane, The Avenue and Post Street
  no warning on record since 2006 8.1 km
• Broughton Lodge Farm in Southoe, Mill Road in Buckden, High Street in Offord Darcy and Station Lane in Offord Cluny
  3 warnings and alerts since 2006, latest Nov 2024 9.3 km
• Banks End, Splash Lane, Manor Close, St Margarets Road, Warren Close, Ware Lane, Victoria Crescent, Rectory Lane and Huntingdon Road in Wyton, St Ives Road, Home Farm Road, Mill Street, Chapel Lane, Thicket Road and Meadow Lane in Houghton
  no warning on record since 2006 9.5 km

Recorded floods near Alconbury

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

• 10 Apr 1998 — Easter 1998 Alconbury Main river
• 9 Apr 1998 — LNA_1998_April_River Nene_d/s Northampton Main river
• 1 Jan 1998 — Easter 1998
• 1 Jan 1988 — January 1988 River
• 1 Jan 1968 — July 1968 River
• 16 Mar 1947 — LNA_1947_March_River Nene_d/s Northampton Main river
• 1 Jan 1947 — March 1947

Rainfall near Alconbury

Alconbury gets about 605 mm of rain a year on average (wettest month October, 63 mm; driest March, 37 mm). That is 48% drier than the UK as a whole, which averages 1,163 mm a year. Source: Met Office HadUK-Grid 1991–2020 (5 km grid), 2.0 km from the place centre.

The nearest rain gauge, Rainfall station (6.0 km away), recorded 0.1 mm in the last 24 hours and 0.2 mm in the last 7 days (latest reading 28 min ago).

At-risk postcodes in Alconbury

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

High likelihood (10)

Medium likelihood (6)

Low likelihood (5)

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.