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No official flood warning is active nearby and the closest river stations are within normal ranges.
Updated 2026-10-09 13:00:33 UTC · Official GOV.UK warnings · Flood preparation & help guide
Corsham is a historic market town and civil parish in west Wiltshire, England. It is at the southwestern edge of the Cotswolds, just off the A4 national route. It is 28 miles (45 km) southwest of Swindon, 20 miles (32 km) east of Bristol, 8 miles (13 km) north-east of Bath, and 4 miles (6 km) southwest of Chippenham.
Towns and villages near Corsham with a page of their own: the homes in a flood risk area there, the nearest river gauges, and recorded floods.
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 an unnamed stream, about 160 m from the middle of Corsham's gauges. It flows into Byde Mill Brook about 130 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 an unnamed stream nearest the middle of Corsham'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.
Corsham is monitored by 1 Environment Agency river level station on the River Avon, in Wiltshire. Water levels are updated every 15 minutes, providing real-time flood monitoring for the area.
The River Avon is monitored by 1 station (Corsham). Each station records water levels continuously, with data synced to FloodRadar every 5 minutes.
There are 7 Environment Agency flood warning areas within 10km of Corsham. When the EA issues a flood warning for any of these areas, it will appear on this page. These include: Bristol Avon and tributaries from downstream of Chippenham to Melksham including Reybridge, Lacock and Bewley Court; Bristol Avon including New Broughton Road, Old Broughton Road and Bradford Road. Clackers Brook including Lowbourne, Webbs Close and Bath Road and the South Brook including Northbrook Road, Southbrook Road and Roundpond; Avon Reach, The Bridge, Foghamshire, Providence Terrace, Ivy Road, St Mary Street, Emery Gate, Borough Parade, Westmead Lane, Monkton Park, St Mellion Close, Riverside Drive, Lytham Close, Gleneagles Close, Eastern Avenue and Wentworth Close; Sea and Air Cadet Headquarters, High Street, Borough Parade, River Parade, The Bridge, Rowden Hill and Bath Road.
There are 8 storm overflows within 5km of Corsham. None of the 8 with a reporting monitor are currently discharging. Enable "Sewage" on the map above to see their locations.
6 of them, nearest first, with their own page of live status and past discharges:
If flooding is forecast in Corsham, 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.
Corsham gets about 845 mm of rain a year on average (wettest month November, 92 mm; driest March, 56 mm). That is 27% 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), 2.5 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.
Corsham has river level monitoring on River Avon — 1 monitoring station 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 5 recorded flood extents around the town centre since 1703, most recently in 2014. 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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