No official flood warning is active nearby and the closest river stations are within normal ranges.
Updated 2026-08-24 00:47:48 UTC · Official GOV.UK warnings · Flood preparation & help guide
Alton is monitored by 3 Environment Agency river level stations on the Caker Stream, the River Wey, in Hampshire. Water levels are updated every 15 minutes.
Alton is monitored by 3 Environment Agency river level stations on the Caker Stream, the River Wey, in Hampshire. Water levels are updated every 15 minutes, providing real-time flood monitoring for the area.
The Caker Stream is monitored by 1 station (Caker Stream). The River Wey is monitored by 2 stations (Alton High Street, Kings Pond). Each station records water levels continuously, with data synced to FloodRadar every 5 minutes.
There are 2 Environment Agency flood warning areas within 10km of Alton. When the EA issues a flood warning for any of these areas, it will appear on this page. These include: Communities at risk of groundwater flooding in the Alton, Chawton and Lower Farringdon areas; River Wey and Caker Stream at Alton and the River Wey at Upper Froyle and Bentley, Hampshire.
There are 2 storm overflows within 5km of Alton. None are currently discharging. Enable "Sewage" on the map above to see their locations.
If flooding is forecast in Alton, 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.
Floods whose mapped extent (EA Recorded Flood Outlines) reached within ~5 km of the town centre — most recent first. See them on the map →
Current verdict: Normal. No official flood warning is active nearby and the closest river stations are within normal ranges.
Alton has river level monitoring on Caker Stream, River Wey — 3 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 5 recorded flood extents around the town centre since 1946, most recently in 1968. Absence of a record does not mean a place has never flooded. See the flood history link below.
