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 10 Sep 2026 06:00
• Bissoe
  Carnon River · 8.9 km away 0.26 m
  normal range · steady · 1 h 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 25 flood warnings and alerts for them since 2006, most recently on 29 Aug 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
  18 warnings and alerts since 2006, latest Aug 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. Absence of a record does not mean a place has never 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

The nearest rain gauge, Rainfall station (2.8 km away), recorded 0.4 mm in the last 24 hours and 27.4 mm in the last 7 days (latest reading 1 h 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.