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Rivers and the sea · England · Environment Agency data updated 6 July 2026

Cornwall Flood Risk

In Cornwall, 10,863 of 415,455 properties (2.6%) are in areas at high or medium risk of flooding from rivers and the sea — at least a 1 in 100 chance in any year — per Environment Agency data updated 6 July 2026; that ranks 9th of 296 local authorities in England by number.

Check an address — gov.uk ↗Flood warnings nowRiver levels

7,284
Properties at high risk
3,579
Properties at medium risk
2.6%
Share at high or medium (rank 78th)
324
Dates with a mapped flood

By bandProperties in Cornwall by flood-risk band

Risk bandChance of flooding each yearAll propertiesHomes
High3.3% (1 in 30) or greater chance in any year7,2843,961
Mediumbetween 1% and 3.3% (1 in 100 to 1 in 30) chance in any year3,5792,199
Lowbetween 0.1% and 1% (1 in 1,000 to 1 in 100) chance in any year4,2172,600
Very lowless than 0.1% (1 in 1,000) chance in any year2,1581,057

6,160 of the high- or medium-risk properties are homes and 3,777 are non-residential. 1,755 postcodes in Cornwall have at least one property at high or medium risk.

Postcode districtsFlood risk across Cornwall

Counts are for the part of each district inside Cornwall.

DistrictPropertiesHigh + mediumHighShare
PL246,814 1,08127315.9%
PL139,702 8868169.1%
TR2610,231 8343708.2%
TR1812,762 6444015.0%
PL2619,109 5364192.8%
PL102,827 44340815.7%
TR63,828 4027710.5%
TR812,516 3713043.0%
TR1611,599 3222642.8%
PL223,068 31024710.1%
TR1119,518 3042501.6%
TR198,223 2842633.5%
TR107,229 2762403.8%
TR2711,936 2752032.3%
PL2515,522 2661861.7%
EX2314,481 2632131.8%
TR1313,616 261871.9%
TR1512,934 2332161.8%
TR208,581 2131022.5%
TR1416,247 1931721.2%
PL1418,485 1901541.0%
TR129,475 1831591.9%
PL2711,693 1771351.5%
PL1214,034 1731631.2%
PL1516,695 136580.8%
PL3010,519 134961.3%
TR38,390 133791.6%
TR28,921 128851.4%
PL116,655 1201001.8%
PL233,323 1191053.6%
TR410,163 114931.1%
PL319,938 114341.1%
PL177,940 1121021.4%
PL285,980 102861.7%
PL351,140 10088.8%
TR714,092 97860.7%
TR113,856 67290.5%
PL291,366 59574.3%
PL183,440 52411.5%
PL324,076 49101.2%
TR53,188 42421.3%
TR95,573 34270.6%
TR171,318 18161.4%
PL341,759 750.4%
EX221,247 310.2%
PL331,445 210.1%
TR211 11100.0%

Recorded floodsPast floods mapped in Cornwall

The Environment Agency has mapped flood outlines on 324 dates in postcode districts that mostly lie in Cornwall since 1880; the most recent started on 9 Dec 2025.

1880s 1 1890s 1 1900s 2 1920s 2 1930s 3 1940s 2 1950s 11 1960s 8 1970s 14 1980s 25 1990s 47 2000s 66 2010s 93 2020s 49

StartedPlace / name in the recordSource of floodingCauseDistricts
9 Dec 2025Notterbridge 10 outlinesMain river, drainageChannel capacity exceeded (no raised defences)PL12 PL13 PL14 PL22
6 Dec 2025Bude 2 outlinesSeaChannel capacity exceeded (no raised defences)EX23
9 Sep 2025Looe 11 outlinesSea, drainageChannel capacity exceeded (no raised defences)PL13 PL23 PL25 TR10 TR3
3 Sep 2025LooeDrainageLocal drainage/surface waterPL13
28 Aug 2025 – 29 Aug 2025Polperro 4 outlinesMain river, drainageLocal drainage/surface waterPL10 PL13 PL25
24 Nov 2024Gunnislake 2 outlinesMain riverChannel capacity exceeded (no raised defences)PL18
18 Oct 2024Mylor Churchtown 2 outlinesSeaLocal drainage/surface waterTR10 TR11
7 Oct 2024TruroDrainageLocal drainage/surface waterTR1
6 Oct 2024PolmorlaMain riverChannel capacity exceeded (no raised defences)PL27
21 Sep 2024FalmouthDrainageLocal drainage/surface waterTR11
19 Sep 2024Little PetherickSeaChannel capacity exceeded (no raised defences)PL28
9 Apr 2024St Ives 8 outlinesSeaChannel capacity exceeded (no raised defences)EX23 TR26
8 Apr 2024Penzance 4 outlinesSeaChannel capacity exceeded (no raised defences)PL13 TR18
11 Mar 2024MillbrookSeaChannel capacity exceeded (no raised defences)PL10
4 Jan 2024MevagisseyMain riverChannel capacity exceeded (no raised defences)PL25
29 Oct 2023Looe 4 outlinesSeaChannel capacity exceeded (no raised defences)PL13 PL23 PL25 TR26
28 Oct 2023Looe 6 outlinesSeaChannel capacity exceeded (no raised defences)PL13 PL22 PL23 PL25 TR11 TR3
30 Sep 2023BudeSeaChannel capacity exceeded (no raised defences)EX23
1 Sep 2023Looe 2 outlinesSeaChannel capacity exceeded (no raised defences)PL13 PL23
20 Jun 2023BodminNot recordedLocal drainage/surface waterPL31
9 May 2023Bush, BudeMain riverChannel capacity exceeded (no raised defences)EX23
23 Mar 2023Looe 5 outlinesSeaChannel capacity exceeded (no raised defences)EX23 PL13 PL25 TR18 TR6
22 Mar 2023 – 23 Mar 2023Penzance 7 outlinesSeaChannel capacity exceeded (no raised defences)PL23 PL25 TR17 TR18
10 Mar 2023Perranporth 3 outlinesSeaChannel capacity exceeded (no raised defences)PL28 PL29 TR6
20 Dec 2022BodminNot recordedLocal drainage/surface waterPL31
24 Nov 2022Perranporth 2 outlinesSeaChannel capacity exceeded (no raised defences)PL29 TR6
7 Nov 2022Lostwithiel 2 outlinesMain river, seaChannel capacity exceeded (no raised defences)PL22 PL23
3 Nov 2022MarazionMain riverChannel capacity exceeded (no raised defences)TR20
16 Aug 2022Newquay 5 outlinesOtherLocal drainage/surface waterPL23 PL30 TR7
15 Aug 2022Launceston 2 outlinesOtherLocal drainage/surface waterPL15 TR1
30 May 2022LostwithielOtherLocal drainage/surface waterPL22
18 Feb 2022PerranporthSeaChannel capacity exceeded (no raised defences)TR6
7 Dec 2021Perranporth 2 outlinesSeaOtherPL29 TR6
30 Oct 2021Tregrehan StreamMain riverChannel capacity exceeded (no raised defences)PL25
10 Feb 2021PortmellonSeaOtherPL25
31 Jan 2021Lelant 2 outlinesOrdinary watercourseChannel capacity exceeded (no raised defences)TR27
19 Dec 2020Lostwithiel 3 outlinesMain riverChannel capacity exceeded (no raised defences)PL12 PL17 PL22
18 Dec 2020Lostwithiel 3 outlinesSea, drainageOvertopping of defencesPL12 PL22 PL25
16 Dec 2020Millendreath 7 outlinesSea, main riverLocal drainage/surface waterPL13 PL23 PL25 PL31 TR11 TR18
15 Nov 2020Mevagissey 2 outlinesSeaOvertopping of defencesPL25

Showing the 40 most recent of 324 dates.

What this page shows, and what it misses

The Environment Agency's count of properties in each postcode that sit in areas of land at very low, low, medium or high risk of flooding from rivers and the sea, allowing for flood defences and their condition, added up here by postcode district and local authority. Every property in England is counted once, so the share is of all properties in the area.

It misses: surface water (heavy rain), groundwater, sewer and reservoir flooding; Wales, Scotland and Northern Ireland; and anything about a single building. A band describes the land a property stands on, not its floor level or flood protection, so it is not a forecast for any one home. Past floods come from the EA's Recorded Flood Outlines and are placed in the postcode district whose centre is nearest (within 12 km), so a flood near a boundary can be listed under a neighbour. Older records are patchy, and a flood with no outline is not listed.

"Cornwall" means the local authority area (ONS code E06000052), not only the town centre.

If you live in Cornwall

FAQQuestions people ask

Is Cornwall at risk of flooding?

In Cornwall, 10,863 of 415,455 properties (2.6%) are in areas at high or medium risk of flooding from rivers and the sea — at least a 1 in 100 chance in any year — per Environment Agency data updated 6 July 2026; that ranks 9th of 296 local authorities in England by number.

Which parts of Cornwall have the most properties at flood risk?

Postcode district PL24 has the most: 1,081 properties at high or medium risk (15.9% of its properties in Cornwall). The table on this page lists every district.

When did Cornwall last flood?

The Environment Agency has mapped flood outlines on 324 dates in postcode districts that mostly lie in Cornwall since 1880; the most recent started on 9 Dec 2025.

Does this include surface water flooding?

No. These counts cover flooding from rivers and the sea only. Surface water (heavy rain) flooding affects more properties in England; check it for one address on gov.uk's long-term flood risk service.

Flood risk counts: Environment Agency, Risk of Flooding from Rivers and Sea – Postcodes in Areas at Risk and Recorded Flood Outlines, used under the Open Government Licence v3.0. © Environment Agency copyright and/or database right 2025. All rights reserved. Some features of this information are based on digital spatial data from the Centre for Ecology & Hydrology, © NERC (CEH). © Crown Copyright and Database Rights 2025 OS AC0000807064. This product is produced in part from PAF® and Multiple Residence Data, the copyright in which is owned by Royal Mail Group Limited and/or Royal Mail Group plc. All rights reserved. Licence number AC0000807064.

Local authority of each postcode: Office for National Statistics postcode lookup (May 2026), licensed under the Open Government Licence v3.0. Contains OS data © Crown copyright and database right 2026. Contains Royal Mail data © Royal Mail copyright and database right 2026. District centres and place names: postcodes.io (ONS/OS open data). Totals, ranks and grouping are Global Incident Tracker's own calculations; the Environment Agency does not endorse them.