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No official flood warning is active nearby and the closest river stations are within normal ranges.
Updated 2026-10-10 12:33:44 UTC · Official GOV.UK warnings · Flood preparation & help guide
Portsmouth is a village on the A646 road, in the civil parish of Todmorden, in the Calderdale district, in the county of West Yorkshire, England. Nearby settlements include the towns of Burnley and Todmorden and the village of Cornholme.
Towns and villages near Portsmouth 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 the River Calder, about 10 m from the middle of Portsmouth's gauges. It flows into the River Aire (Castleford Cut) about 83 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 Calder nearest the middle of Portsmouth'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.
Portsmouth is monitored by 1 Environment Agency river level station on the River Calder, in West Yorkshire. Water levels are updated every 15 minutes, providing real-time flood monitoring for the area.
The River Calder is monitored by 1 station (Portsmouth Lennox Road). 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 Portsmouth. When the EA issues a flood warning for any of these areas, it will appear on this page. These include: Cornholme, Robinwood and Lydgate including Lineholme Avenue, Orchan Road, Glen Avenue, Scaitcliffe Hall, Todmorden High School, Burnley Road, Church Road and Redwater Clough; Harley Wood areas including Stoney Royd Lane, Burnley Road, Cross Lee Road and Mons Road; Gauxholme area including Bacup Road between Gorpley Wood and Gauxholme Bridge; Todmorden Cricket Ground to the Railway Bridge south of Burnley Road including Queen Street and Back Ridge Street.
There are 16 storm overflows within 5km of Portsmouth. None of the 15 with a reporting monitor are currently discharging (1 has no live status right now). 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 Portsmouth, 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.
Portsmouth gets about 1,403 mm of rain a year on average (wettest month December, 164 mm; driest May, 80 mm). That is 21% wetter 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), 2.7 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.
Portsmouth has river level monitoring on River Calder — 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 4 recorded flood extents around the town centre since 1703, most recently in 2015. 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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