Does Basingstoke flood?

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

Ordnance Survey places 77 postcodes in Basingstoke 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 1,171 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 Basingstoke

Environment Agency gauges within 10 km of Basingstoke watch River Loddon, Petty's Brook, River Whitewater.

• Pyotts Bridge
  River Loddon · 2.9 km away No recent reading
  last reported 27 Oct 2026 05:30
• Chineham
  Petty's Brook · 3.5 km away 0.36 m
  normal range · just past its peak · 35 min ago
• Longbridge Mill
  River Loddon · 7.0 km away 0.24 m
  normal range · steady · 35 min ago
• Lodge Farm Structure
  River Whitewater · 9.5 km away 0.17 m
  controlled by a sluice or weir · 35 min ago

Distances are from the middle of Basingstoke'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 Basingstoke

6 Environment Agency flood warning areas lie within 10 km of Basingstoke. The EA has issued 93 flood warnings and alerts for them since 2006, most recently on 1 Apr 2026.

• Communities at risk of groundwater flooding in the Basingstoke and Buckskin areas
  2 warnings and alerts since 2006, latest Feb 2020 2.2 km
• Communities at risk of groundwater flooding in the Sherborne St John area
  1 warning or alert since 2006, latest Mar 2024 2.8 km
• Pettys Brook at Chineham, Hampshire
  no warning on record since 2006 3.8 km
• River Loddon at Old Basing including Wildmore, Hampshire
  no warning on record since 2006 5.1 km
• Upper River Loddon including Basingstoke, Old Basing, Sherfield-on-Loddon, Chineham and Meadow Park
  46 warnings and alerts since 2006, latest Aug 2024 6.3 km
• Areas at risk of groundwater flooding in Deane and Ashe in the Upper Test catchment in North Hampshire
  44 warnings and alerts since 2006, latest Apr 2026 10.0 km

Recorded floods near Basingstoke

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

• 1 Jan 1947 — 06MarchSpring1947 Main river

Rainfall near Basingstoke

Basingstoke gets about 798 mm of rain a year on average (wettest month November, 92 mm; driest May, 52 mm). That is 31% drier than the UK as a whole, which averages 1,163 mm a year. Source: Met Office HadUK-Grid 1991–2020 (5 km grid), 1.3 km from the place centre.

The nearest rain gauge, Rainfall station (4.2 km away), recorded 8.5 mm in the last 24 hours and 55.1 mm in the last 7 days (latest reading 35 min ago).

At-risk postcodes in Basingstoke

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

High likelihood (33)

Medium likelihood (6)

Low likelihood (38)

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.