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Does Staines flood? 479 postcodes in Staines are in the Environment Agency's rivers-and-sea flood-risk data (112 High, 77 Medium likelihood) — the breakdown is further down this page.
No official flood warning is active nearby and the closest river stations are within normal ranges.
Updated 2026-10-08 01:35:21 UTC · Official GOV.UK warnings · Flood preparation & help guide
Staines-upon-Thames, commonly known simply as Staines, is a market town in northwest Surrey, England, around 17 miles west of central London. It is in the Borough of Spelthorne, at the confluence of the River Thames and Colne. Historically part of Middlesex, the town was transferred to Surrey in 1965. Staines is close to Heathrow Airport and is linked to the national motorway network by the M25 and M3. The town is part of the Greater London Built-up Area.
Ordnance Survey places 479 postcodes in Staines-upon-Thames 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 9,457 properties in the EA dataset's likelihood bands.
| EA likelihood band | Postcodes (worst band) | Properties in the EA dataset | of which homes |
|---|---|---|---|
| High | 112 | 1,547 | 1,335 |
| Medium | 77 | 1,262 | 1,104 |
| Low | 214 | 4,636 | 4,333 |
| Very low | 76 | 2,012 | 1,825 |
| All bands | 479 | 9,457 | 8,597 |
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.
…and 379 more at-risk postcodes, listed on the district pages below.
Penton Hook · Ashford · Wraysbury · Shepperton Green · Ashford Common · Charlton · Colnbrook · Shepperton
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.
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.
The nearest watercourse on the river map is the River Colne, about 240 m from the middle of Staines's gauges. It flows into the River Thames about 470 m downstream.
A gauge downstream shows water that has already passed this point; one upstream sees it first. Distances along the river are from the point on the River Colne nearest the middle of Staines's gauges. From Ordnance Survey’s river map (OS Open Rivers), which leaves out small streams, ditches and culverts, so a nearer one may exist. This describes where water goes on the map; it says nothing about flooding at any address. Contains OS data © Crown copyright and database rights 2026.
Staines is monitored by 5 Environment Agency river level stations on the River Ash, the River Colne, the River Thames, the Wraysbury River, in Surrey. Water levels are updated every 15 minutes, providing real-time flood monitoring for the area.
The River Ash is monitored by 2 stations (Knowle Green, Staines Ash). The River Colne is monitored by 1 station (Staines Trading Estate). The River Thames is monitored by 1 station (Staines). The Wraysbury River is monitored by 1 station (Pound Mill, Staines). Each station records water levels continuously, with data synced to FloodRadar every 5 minutes.
There are 8 Environment Agency flood warning areas within 10km of Staines. When the EA issues a flood warning for any of these areas, it will appear on this page. These include: Areas at risk of groundwater flooding in Egham; 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; River Thames at Staines and Egham including Bell Weir and Penton Hook Locks, Runnymede, Hythe End, Pooley Green, Thorpe Lea and east Egham; River Thames from Datchet to Shepperton Green including Old Windsor, Wraysbury, Horton, Staines, Egham, Laleham and Chertsey.
There is 1 storm overflow within 5km of Staines. None of the 1 with a reporting monitor is currently discharging. Enable "Sewage" on the map above to see their locations.
It has its own page of live status and past discharges:
If flooding is forecast in Staines, call Floodline on 0345 988 1188 for the latest information. Move valuables upstairs, turn off gas and electricity if safe to do so, and avoid walking or driving through flood water. Sign up for flood warnings on any station page above to receive email alerts when water levels rise. For emergency numbers, a preparation checklist and insurance guidance, see our flood help & preparation guide.
Staines gets about 645 mm of rain a year on average (wettest month October, 70 mm; driest March, 41 mm). That is 45% drier than the UK as a whole, which averages 1,163 mm a year. See the rain gauges →
A thirty-year average for the area, not a forecast and not a flood risk on its own. Source: Met Office HadUK-Grid 1991–2020 (5 km grid), 1.3 km away. Average rainfall: HadUK-Grid v1.3.2, Met Office. Contains public sector information licensed under the Open Government Licence v3.0.
Floods whose mapped extent (EA Recorded Flood Outlines) reached within ~5 km of the town centre — most recent first. These are records of mapped extents, not a full list of floods. See them on the map →
Records, not floods: no outline on the record is not evidence a place has not flooded.
Current verdict: Normal. No official flood warning is active nearby and the closest river stations are within normal ranges.
Staines has river level monitoring on River Ash, River Colne, River Thames, Wraysbury River — 5 monitoring stations in total.
Use the GOV.UK Check for Flooding service (check-for-flooding.service.gov.uk) or call Floodline on 0345 988 1188 (24 hours). You can also set up free FloodRadar email or browser alerts from any station page above.
Follow official advice: move valuables and vehicles to safety, never walk or drive through flood water, turn off gas and electricity if safe, and check on vulnerable neighbours. See our flood preparation guide at floodradar.co.uk/flood-help.
Yes — the Environment Agency's Recorded Flood Outlines dataset shows 60 recorded flood extents around the town centre since 1703, most recently in 2024. That is a count of mapped extents, not of separate floods. Records, not floods: no outline on the record is not evidence a place has not flooded. See the flood history link below.
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