Does Falmouth flood?

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

Ordnance Survey places 41 postcodes in Falmouth 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 292 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 Falmouth

Environment Agency gauges within 10 km of Falmouth watch Praze Stream, River Kennall, Carnon River.

• Penryn Trelawney Park Structure
  Praze Stream · 3.1 km away Sensor under review
  reading not shown
• Ponsanooth
  River Kennall · 6.4 km away No recent reading
  last reported 25 Oct 2026 06:00
• Bissoe
  Carnon River · 8.9 km away 0.38 m
  normal range · 44 min ago

Distances are from the middle of Falmouth'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 Falmouth

2 Environment Agency flood warning areas lie within 10 km of Falmouth. The EA has issued 29 flood warnings and alerts for them since 2006, most recently on 30 Sep 2026.

• Tidal Fal Estuary at Falmouth, Penryn, Flushing, Perranarworthal and Tresillian
  7 warnings and alerts since 2006, latest Feb 2026 6.3 km
• Tidal Fal Estuary at Falmouth, Penryn, Flushing, Perranarworthal, Truro and Tresillian
  22 warnings and alerts since 2006, latest Sep 2026 6.3 km

Recorded floods near Falmouth

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

• 9 Sep 2025 — Restronguet Sea
• 9 Sep 2025 — Penryn Sea
• 9 Sep 2025 — Mylor Sea
• 18 Oct 2024 — Penryn Sea
• 18 Oct 2024 — Mylor Churchtown Sea
• 21 Sep 2024 — Falmouth Drainage
• 28 Oct 2023 — St Mawes Sea
• 16 Dec 2020 — CW9657 - Flushing Sea
• 27 Nov 2019 — CW9613 - Penryn amd Falmouth Sea
• 6 Nov 2019 — CW9610 - Falmouth
• 9 Oct 2019 — CW9634 - St Mawes
• 30 Sep 2019 — CW9602 - Swanpool Drainage

…and 57 earlier recorded floods on the map.

Rainfall near Falmouth

Falmouth gets about 1,078 mm of rain a year on average (wettest month December, 131 mm; driest May, 59 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), 2.2 km from the place centre.

The nearest rain gauge, Rainfall station (2.8 km away), recorded 0.6 mm in the last 24 hours and 95.2 mm in the last 7 days (latest reading 44 min ago).

At-risk postcodes in Falmouth

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

High likelihood (25)

Medium likelihood (5)

Low likelihood (10)

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.