Does Penton Hook flood?
What the Environment Agency's rivers-and-sea flood-risk data says about Penton Hook
Ordnance Survey places 21 postcodes in Penton Hook 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 521 properties in the EA dataset's likelihood bands.
| EA likelihood band | Postcodes (worst band) | Properties in the EA dataset | of which homes |
|---|---|---|---|
| High | 18 | 357 | 329 |
| Medium | 3 | 149 | 143 |
| Low | 0 | 15 | 13 |
| Very low | 0 | 0 | 0 |
| All bands | 21 | 521 | 485 |
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 Penton Hook
Environment Agency gauges within 10 km of Penton Hook watch River Thames, Chertsey Bourne, River Ash, Wraysbury River, River Colne, Addlestone Bourne.
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Penton Hook Structure
River Thames · 0.7 km away 0.14 mASD
controlled by a sluice or weir · 31 min ago -
Chertsey Lock Structure
River Thames · 2.1 km away 0.18 mASD
controlled by a sluice or weir · 31 min ago -
Guildford Street
Chertsey Bourne · 2.1 km away 0.47 mASD
normal range · rising · 31 min ago -
Free Prae Road
Chertsey Bourne · 2.4 km away 1.00 mASD
normal range · rising · 31 min ago -
Knowle Green
River Ash · 2.6 km away 0.43 mASD
normal range · steady · 31 min ago -
Staines
River Thames · 2.8 km away 2.63 mASD
below normal · steady · 31 min ago -
Pound Mill, Staines Structure
Wraysbury River · 3.3 km away 0.15 mASD
controlled by a sluice or weir · 31 min ago -
Staines Trading Estate
River Colne · 3.4 km away 1.19 mASD
normal range · rising · 31 min ago -
Staines Ash Structure
River Ash · 3.7 km away 0.07 mASD
controlled by a sluice or weir · 31 min ago -
Shepperton Lock Structure
River Thames · 4.0 km away 0.11 mASD
controlled by a sluice or weir · 31 min ago -
Addlestone
Addlestone Bourne · 4.0 km away 0.30 mASD
normal range · steady · 31 min ago -
Bell Weir Structure
River Thames · 4.3 km away 0.23 mASD
controlled by a sluice or weir · 31 min ago
Distances are from the middle of Penton Hook'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 Penton Hook
45 Environment Agency flood warning areas lie within 10 km of Penton Hook. The EA has issued 399 flood warnings and alerts for them since 2006, most recently on 14 Mar 2026.
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River Thames at Laleham and Penton Hook including Penton Park, Laleham Reach and Laleham Abbey, Staines Road, The Broadway and Thames Side
7 warnings and alerts since 2006, latest Jan 2024 0.3 km -
River Thames from Runnymede Pleasure Grounds, Staines to Penton Hook, including Hythe End Road, Bell Weir Lock, Holm Island, Church Island, Truss Island and Penton Hook Lock areas of Staines
7 warnings and alerts since 2006, latest Jan 2024 1.6 km -
Chertsey Bourne at Chertsey, including Chilsey Green Road, St. Annes Road, Fordwater Road and Fordwater Trading Estate areas
2 warnings and alerts since 2006, latest Jan 2024 1.8 km -
River Thames at the Littleton Lane, Chertsey Road and Pool End areas of Shepperton Green as well as Dockett Eddy, Dockett Point and Pharaoh's Island
6 warnings and alerts since 2006, latest Jan 2024 2.0 km -
River Thames at Chertsey including Chertsey Lock, Abbeychase, Chertsey Bridge Road, Thames Close, Hazelbank Road, Mead Lane and Bridge Wharf
6 warnings and alerts since 2006, latest Jan 2024 2.2 km -
River Ash at Ashford and Staines, including Birch Green, Knowle Green, Littleton and Shepperton
1 warning or alert since 2006, latest Feb 2014 2.3 km -
Areas at risk of groundwater flooding in Egham
2 warnings and alerts since 2006, latest Jan 2021 2.4 km -
River Thames in the Shepperton Green village area
2 warnings and alerts since 2006, latest Feb 2014 2.7 km -
Areas closest to the Chertsey Bourne in Chertsey including Grove Road, Free Prae Road, Eastworth Road, Meadow View, Lakeside Park and the Chertsey Mead and Hamm Court Estate areas
2 warnings and alerts since 2006, latest Feb 2026 2.8 km -
Chertsey Bourne at Thorpe Green including Green Road and Trumps Green, Surrey
2 warnings and alerts since 2006, latest Jan 2024 3.1 km -
River Ash in the Borough of Spelthorne including Ashford and Staines
1 warning or alert since 2006, latest Feb 2014 3.1 km -
Chertsey Bourne including Virginia Water, Thorpe Green and Chertsey and the Moat at Thorpe
92 warnings and alerts since 2006, latest Mar 2026 3.2 km
Recorded floods near Penton Hook
Floods whose mapped extent (EA Recorded Flood Outlines) reached within ~5 km of Penton Hook, most recent first. Absence of a record does not mean a place has never flooded. See them on the map →
- 9 Jan 2024 — EA06JanuaryWinter2024 Main river
- 7 Jan 2024 — EA06JanuaryWinter2024 Main river
- 2 Nov 2023 — EA06NovemberAutumn2023 Main river
- 20 Dec 2019 — ea06DecemberWinter2019 Main river
- 19 Dec 2019 — EA06DecemberWinter2019 Main river
- 31 Jan 2014 — ea06FebruaryWinter2014 Main river
- 7 Jan 2014 — ea06JanuaryWinter2014 Main river
- 23 Nov 2013 — Winter 2013/2014 Other
- 28 Dec 2012 — ea06DecemberWinter2012 Main river
- 18 Jun 2011 — ea06JuneSummer2011 Main river
- 30 Nov 2009 — ea06NovemberAutumn2009 Main river
- 23 Dec 2002 — 06JanuaryNewYear2003 Main river
Rainfall near Penton Hook
The nearest rain gauge, Rainfall station (1.9 km away), recorded 2.5 mm in the last 24 hours and 18.6 mm in the last 7 days (latest reading 46 min ago).
At-risk postcodes in Penton Hook
Every postcode Ordnance Survey places in Penton Hook that appears in the EA's rivers-and-sea dataset, worst band first. Each links to its own flood-risk page.
High likelihood (18)
Medium likelihood (3)
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.
Flood-risk bands: © Environment Agency copyright and/or database right 2025. All rights reserved. Some features of this map are based on digital spatial data from the Centre for Ecology & Hydrology, © NERC (CEH). © Crown Copyright and Database Rights 2025 OS AC0000807064. This product is produced in part from PAF® and Multiple Residence Data, the copyright in which is owned by Royal Mail Group Limited and/or Royal Mail Group plc. All rights reserved. Licence number AC0000807064.
Recorded Flood Outlines, flood warning areas and warning history © Environment Agency copyright and/or database right 2025. Licensed under the Open Government Licence v3.0.
River levels and rainfall: Environment Agency real-time flood-monitoring data, updated every 15 minutes (Open Government Licence v3.0).
Place names: Contains OS data © Crown copyright and database rights 2026. Contains Royal Mail data © Royal Mail copyright and database right 2026. Contains National Statistics data © Crown copyright and database right 2026. Licensed under the Open Government Licence v3.0.