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Conditions are worth watching: heavy rain has fallen nearby (16.4 mm in the last 24 hours at Rainfall station). Keep an eye on updates if heavy rain continues.
Updated 2026-10-09 22:01:35 UTC · Official GOV.UK warnings · Flood preparation & help guide
Thornhill is a village and civil parish in the county of Derbyshire, England, in the Peak District, south of Ladybower Reservoir and east of Castleton. The population of the civil parish at the 2021 census was 147.
The nearest watercourse on the river map is the River Derwent, about 20 m from the middle of Thornhill's gauges. It flows into the River Trent about 89 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 Derwent nearest the middle of Thornhill'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.
Thornhill is monitored by 1 Environment Agency river level station on the River Derwent, in Derbyshire. Water levels are updated every 15 minutes, providing real-time flood monitoring for the area.
The River Derwent is monitored by 1 station (Yorkshire Bridge). Each station records water levels continuously, with data synced to FloodRadar every 5 minutes.
There are 5 Environment Agency flood warning areas within 10km of Thornhill. When the EA issues a flood warning for any of these areas, it will appear on this page. These include: River Derwent at Bamford including the Garden Centre at Shatton and Mytham Bridge; Properties near Bradwell Brook at Bradwell; Peakshole Water at Castleton; River Derwent at Hathersage for riverside farms and properties.
There are 8 storm overflows within 5km of Thornhill. 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 Thornhill, 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.
Thornhill gets about 1,317 mm of rain a year on average (wettest month December, 156 mm; driest May, 76 mm). That is close to 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), 3.2 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 (16.4 mm in the last 24 hours at Rainfall station). Keep an eye on updates if heavy rain continues.
Thornhill has river level monitoring on River Derwent — 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 12 recorded flood extents around the town centre since 1703, most recently in 2021. 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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