Does St Austell flood?

Flood warnings in force near St Austell

• Flood alert — South Cornwall coast from Lizard Point to Gribbin Head excluding the Tidal Fal Estuary
  Flooding is possible 2 hours either side of high tide on Monday afternoon and Tuesday morning 5.4 km

From the Environment Agency (England). Always check the GOV.UK Check for Flooding service or call Floodline on 0345 988 1188.

What the Environment Agency's rivers-and-sea flood-risk data says about St Austell

Ordnance Survey places 40 postcodes in St Austell in the Environment Agency's rivers-and-sea flood-risk dataset (Risk of Flooding from Rivers and Sea). Each postcode is counted once, under the worst band any of its properties reaches; together they hold 324 properties in the EA dataset's likelihood bands.

This dataset covers flooding from rivers and the sea only — one of five flood sources. Surface water, groundwater, sewers and reservoirs are assessed separately, so a postcode missing from it is not proof that a place cannot flood. The band describes the land around properties (allowing for defences), not any single address and not today's conditions.

Rivers and live river levels near St Austell

Environment Agency gauges within 10 km of St Austell watch St Austell River, St Blazey Stream, Par River, Mevagissey Stream, River Fal.

• Molingey
  St Austell River · 3.6 km away 0.73 m
  normal range · 41 min ago
• St Blazey Station Road
  St Blazey Stream · 4.8 km away 0.06 m
  below normal · 41 min ago
• Pentewan Structure
  St Austell River · 5.4 km away 1.27 m
  controlled by a sluice or weir · 41 min ago
• Ponts Vale
  Par River · 5.7 km away 0.47 m
  normal range · 41 min ago
• Luxulyan
  Par River · 5.8 km away 0.52 m
  normal range · 41 min ago
• Mevagissey Structure
  Mevagissey Stream · 7.6 km away 0.22 m
  controlled by a sluice or weir · 41 min ago
• Trenowth
  River Fal · 9.1 km away 0.50 m
  normal range · 41 min ago

Distances are from the middle of St Austell's at-risk postcodes. Tidal and structure gauges are shown as readings only — the tide and sluice gates move them, not floods. A gauge with no recent reading shows no level.

Flood warning areas near St Austell

8 Environment Agency flood warning areas lie within 10 km of St Austell. The EA has issued 322 flood warnings and alerts for them since 2006, most recently on 26 Oct 2026.

• Pentewan, St Blazey, Luxulyan and Mevagissey
  59 warnings and alerts since 2006, latest Feb 2026 4.7 km
• St Blazey Stream at St Blazey including low lying properties at Prideaux Road, Station Road, St Blazey Road, Aberdeen Close, Roselyon Place, Middleway, Harbour Road and Tredenham Close
  no warning on record since 2006 4.8 km
• River Par at Par and St Blazey including the A390, the Sports Centre, St Andrews Road, Railway Station and Station Road
  no warning on record since 2006 5.0 km
• Lizard Point to Gribbin Head including Coverack, the tidal Helford Estuary, Falmouth, St Mawes, Gorran Haven, Portmellon, Mevagissey, Pentewan and Par
  70 warnings and alerts since 2006, latest Feb 2026 5.4 km
• Lizard Point to Gribbin Head including Coverack, the tidal Helford Estuary, Falmouth, St Mawes, Gorran Haven, Portmellon, Mevagissey, Pentewan and Par
  138 warnings and alerts since 2006, latest Oct 2026 5.4 km
• River Par from Luxulyan to Tywardreath Highway including Ponts Mill
  2 warnings and alerts since 2006, latest Jan 2026 5.4 km
• Mevagissey Stream at Mevagissey including the Fire Station, Valley Road, Chapel Street, Church Street, Fore Street and the Harbour
  1 warning or alert since 2006, latest Dec 2025 7.7 km
• The Lizard, Penryn, Falmouth, Truro, Ladock, Tresillian and Grampound
  52 warnings and alerts since 2006, latest Feb 2026 9.1 km

Recorded floods near St Austell

Floods whose mapped extent (EA Recorded Flood Outlines) reached within ~5 km of St Austell, most recent first. Records, not floods: no outline on the record is not evidence a place has not flooded. See them on the map →

• 30 Oct 2021 — Tregrehan Stream Main river
• 27 Aug 2020 — CW9669 - St Blazey
• 24 Dec 2018 — CW9583 - Par moore
• 1 Aug 2018 — CW9587 - St Blazey
• 14 Feb 2014 — CW9393 - St Blazey
• 22 Dec 2012 — CW9279 - Tregrehan Main river
• 22 Dec 2012 — CW9269 - Par - Treesmill Dam Main river
• 22 Dec 2012 — CW9268 - Prideaux Rd. Par Ordinary watercourse
• 22 Dec 2012 — CW9270 - Tregrehan Main river
• 20 Dec 2012 — CW9252 - Par Moor Main river
• 24 Oct 2011 — CW8963 - London Apprentice
• 24 Oct 2011 — CW8968 - Trewoon (SW) Drainage

…and 33 earlier recorded floods on the map.

Rainfall near St Austell

St Austell gets about 1,278 mm of rain a year on average (wettest month November, 160 mm; driest June, 70 mm). That is close to the UK as a whole, which averages 1,163 mm a year. Source: Met Office HadUK-Grid 1991–2020 (5 km grid), 0.2 km from the place centre.

The nearest rain gauge, Rainfall station (3.6 km away), recorded 13.8 mm in the last 24 hours and 97.7 mm in the last 7 days (latest reading 41 min ago).

At-risk postcodes in St Austell

Every postcode Ordnance Survey places in St Austell that appears in the EA's rivers-and-sea dataset, worst band first. Each links to its own flood-risk page.

High likelihood (17)

Medium likelihood (7)

Low likelihood (15)

Very low likelihood (1)

Postcode districts

Sources

FloodRadar summarises public flood data. It is not a flood-risk survey of any property, and it does not replace official GOV.UK flood warnings or the GOV.UK long-term flood risk service.