Does Ash Vale flood?

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

Ordnance Survey places 57 postcodes in Ash Vale 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 1,027 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 Ash Vale

Environment Agency gauges within 10 km of Ash Vale watch River Blackwater, Cove Brook, Fleet Brook, River Wey, River Hart.

• Farnborough
  River Blackwater · 3.3 km away 0.63 mASD
  normal range · steady · 32 min ago
• Tongham Tidal
  River Blackwater · 3.5 km away 0.66 mASD
  rises and falls with the tide · 32 min ago
• Cove Hazel Avenue
  Cove Brook · 4.2 km away No recent reading
  last reported 10 Sep 2026 14:00
• Mayfield Road Structure
  Cove Brook · 5.2 km away 0.90 mASD
  controlled by a sluice or weir · 32 min ago
• Kings Road Bridge
  Fleet Brook · 7.4 km away No recent reading
  last reported 10 Sep 2026 15:00
• Blackwater Bridge
  River Blackwater · 7.7 km away 1.33 mASD
  normal range · steady · 32 min ago
• Farnham Structure
  River Wey · 8.4 km away 0.11 mASD
  controlled by a sluice or weir · 47 min ago
• Tilford
  River Wey · 9.7 km away 0.17 mASD
  normal range · steady · 32 min ago
• Crondall Bridge
  River Hart · 9.8 km away 0.10 mASD
  normal range · steady · 2 h ago
• Crookham Village
  River Hart · 9.8 km away 0.42 mASD
  normal range · steady · 32 min ago

Distances are from the middle of Ash Vale'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 Ash Vale

11 Environment Agency flood warning areas lie within 10 km of Ash Vale. The EA has issued 91 flood warnings and alerts for them since 2006, most recently on 3 Feb 2026.

• River Blackwater at Aldershot and Farnborough including Lakeside Park, Ash Vale, Farnborough Park and Mytchett, Hampshire and Surrey 0.7 km
• Cove Brook at West Farnborough including West Heath and Rafborough 4.5 km
• River Blackwater at Badshot Lea 4.6 km
• Cove Brook at Farnborough including Hawley Bridge, Hampshire 5.5 km
• Properties at Mill Lane, Rapleys Field and Law Meadows 6.1 km
• Properties near the Fleet Brook along Reading Road, Aldershot Road and north of Fleet Pond, and also properties near the Pinegrove Stream in the Pondtail area 7.1 km
• River Wey at Farnham and Waverley Abbey, Surrey
  1 warning or alert since 2006, latest Feb 2020 8.2 km
• River Wey at Tilford, Surrey
  2 warnings and alerts since 2006, latest Feb 2020 9.4 km
• River Wey at Elstead and Eashing, Surrey
  18 warnings and alerts since 2006, latest Jan 2026 9.4 km
• Hoe Stream including Woking
  68 warnings and alerts since 2006, latest Feb 2026 9.5 km
• Properties off The Borough, The Withies, Redlands Lane and Pankridge Street, Crondall
  2 warnings and alerts since 2006, latest Feb 2024 9.8 km

Recorded floods near Ash Vale

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

• 1 Jan 1990 — 06FebruaryWinter1990 Main river
• 1 Jan 1968 — 06SeptemberAutumn1968 Main river

Rainfall near Ash Vale

The nearest rain gauge, Rainfall station (5.7 km away), recorded 0.0 mm in the last 24 hours and 1.0 mm in the last 7 days (latest reading 32 min ago).

At-risk postcodes in Ash Vale

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

High likelihood (7)

Low likelihood (50)

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.