FloodRadar
Log inCreate free account
FloodRadar
Log inCreate free account
Another gauge is also registered under the name Cowley: Cowley Bridge (Devon) — see the Devon gauges. This page is Cowley, Greater London.
No official flood warning is active nearby and the closest river stations are within normal ranges.
Updated 2026-10-10 12:32:17 UTC · Official GOV.UK warnings · Flood preparation & help guide
Cowley is a village contiguous with the town of Uxbridge in the London Borough of Hillingdon. A largely suburban village with 16 listed buildings, Cowley is 15.4 miles (24.8 km) west of Charing Cross, bordered to the west by Uxbridge Moor in the Green Belt and the River Colne, forming the border with Buckinghamshire. Cowley was an ancient parish in the historic county of Middlesex.
Towns and villages near Cowley with a page of their own: the homes in a flood risk area there, the nearest river gauges, and recorded floods.
New Denham · Hayes · Colnbrook · Harrow · Slough · Chalfont St Peter · Wraysbury · Ashford
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 Fray's River, about 310 m from the middle of Cowley's gauges. It flows into the River Colne about 4.3 km 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 Fray's River nearest the middle of Cowley'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.
Cowley is monitored by 2 Environment Agency river level stations on the River Colne, the River Pinn, in Greater London. Water levels are updated every 15 minutes, providing real-time flood monitoring for the area.
The River Colne is monitored by 1 station (Iver, Clisbys Bridge). The River Pinn is monitored by 1 station (Uxbridge). 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 Cowley. When the EA issues a flood warning for any of these areas, it will appear on this page. These include: The River Pinn at Yiewsley including Cowley Peachey; The Lower River Colne and Frays River at Uxbridge, West Drayton, Poyle and Stanwell Moor; The River Pinn at Uxbridge including Hillingdon; The Colne Brook at Iver including Thorney.
There is 1 storm overflow within 5km of Cowley. 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 Cowley, 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.
Cowley gets about 654 mm of rain a year on average (wettest month November, 72 mm; driest March, 41 mm). That is 44% 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), 2.1 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.
Cowley has river level monitoring on River Colne, River Pinn — 2 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 12 recorded flood extents around the town centre since 1703, most recently in 2023. 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.
FloodRadar helper · beta