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Conditions are worth watching: heavy rain has fallen nearby (15.5 mm in the last 24 hours at Rainfall station). Keep an eye on updates if heavy rain continues.
Updated 2026-10-08 01:35:20 UTC · Official GOV.UK warnings · Flood preparation & help guide
Idmiston is a village and civil parish in Wiltshire, England. The village is about 3 miles (4.8 km) southeast of Amesbury and 6 miles (10 km) northeast of Salisbury. The parish includes the villages of Porton and Gomeldon; all three villages are on the River Bourne and are linked by the A338 road.
The nearest watercourse on the river map is the River Bourne, about 30 m from the middle of Idmiston's gauges. It flows into the River Avon about 13 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 the River Bourne nearest the middle of Idmiston'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.
Idmiston is monitored by 1 Environment Agency river level station on the River Bourne, in Wiltshire. Water levels are updated every 15 minutes, providing real-time flood monitoring for the area.
The River Bourne is monitored by 1 station (Idmiston). 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 Idmiston. When the EA issues a flood warning for any of these areas, it will appear on this page. These include: Groundwater flooding in the Bourne Valley for the Winterbournes; Parkhouse Corner, Cholderton, Newton Tony, Allington, Boscombe, Idminston and Porton; Tributaries between Aughton and Laverstock; Winterborne Gunner, Winterborne Daunstsey, Winterborne Earls, Ford, Milford Mill Road in Laverstock, Milford Park and Milford Manor Gardens in the Salisbury, Bishopsdown area.
There are 4 storm overflows within 5km of Idmiston. None of the 4 with a reporting monitor are currently discharging. Enable "Sewage" on the map above to see their locations.
Each has its own page of live status and past discharges:
If flooding is forecast in Idmiston, 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.
Idmiston gets about 809 mm of rain a year on average (wettest month November, 92 mm; driest May, 51 mm). That is 30% 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: Watch. Conditions are worth watching: heavy rain has fallen nearby (15.5 mm in the last 24 hours at Rainfall station). Keep an eye on updates if heavy rain continues.
Idmiston has river level monitoring on River Bourne — 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.
No recorded flood outline is mapped around the Idmiston town centre means no flood was mapped here, which is not evidence none happened: the Environment Agency mapped only some floods, mapping effort rose sharply after about 2000, and surface-water flooding is largely absent from this record. FloodRadar has separately logged 10 flood warnings or alerts for the Wiltshire area since February 2026. See the flood history link below.
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