Tonbridge and Malling Flood Risk
In Tonbridge and Malling, 3,279 of 67,465 properties (4.9%) 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 59th of 296 local authorities in England by number.
By bandProperties in Tonbridge and Malling by flood-risk band
| Risk band | Chance of flooding each year | All properties | Homes |
|---|---|---|---|
| High | 3.3% (1 in 30) or greater chance in any year | 1,354 | 940 |
| Medium | between 1% and 3.3% (1 in 100 to 1 in 30) chance in any year | 1,925 | 1,481 |
| Low | between 0.1% and 1% (1 in 1,000 to 1 in 100) chance in any year | 2,557 | 2,075 |
| Very low | less than 0.1% (1 in 1,000) chance in any year | 850 | 609 |
2,421 of the high- or medium-risk properties are homes and 708 are non-residential. 346 postcodes in Tonbridge and Malling have at least one property at high or medium risk.
Postcode districtsFlood risk across Tonbridge and Malling
Counts are for the part of each district inside Tonbridge and Malling.
Recorded floodsPast floods mapped in Tonbridge and Malling
The Environment Agency has mapped flood outlines on 10 dates in postcode districts that mostly lie in Tonbridge and Malling since 1927; the most recent started on 23 Dec 2013.
1920s 1 1950s 2 1960s 5 2000s 1 2010s 1
| Started | Place / name in the record | Source of flooding | Cause | Districts |
|---|---|---|---|---|
| 23 Dec 2013 – 27 Dec 2013 | Medway 2 outlines | Main river | Channel capacity exceeded (no raised defences) | TN10 TN9 |
| 11 Oct 2000 – 14 Oct 2000 | Medway Tidal 2 outlines | Main river | Channel capacity exceeded (no raised defences) | ME20 TN10 |
| 14 Sep 1968 | Medway Five Oak Green 3 outlines | Main river | Channel capacity exceeded (no raised defences) | ME19 TN11 TN9 |
| 1 Jan 1967 | Medway Tonbridge | Main river | Channel capacity exceeded (no raised defences) | TN9 |
| 10 Dec 1965 | Medway Aylesford | Ordinary watercourse | Channel capacity exceeded (no raised defences) | ME20 |
| 18 Nov 1963 – 19 Nov 1963 | Medway Tonbridge | Main river | Channel capacity exceeded (no raised defences) | TN10 |
| 2 Nov 1960 – 4 Nov 1960 | Medway Five Oak Green 5 outlines | Drainage, main river | Local drainage/surface water | ME6 TN10 TN9 |
| 5 Sep 1958 | EdenbridgetoEastPeckham | Other | Local drainage/surface water | TN11 |
| 1 Feb 1953 – 5 Feb 1953 | Medway Tidal Snodland | Sea | Overtopping of defences | ME6 |
| 25 Dec 1927 | Medway Aylesford | Sea | Channel capacity exceeded (no raised defences) | ME20 |
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.
"Tonbridge and Malling" means the local authority area (ONS code E07000115), not only the town centre.
If you live in Tonbridge and Malling
- Check your own address on gov.uk; it also covers surface water.
- Sign up for free flood warnings: gov.uk/get-flood-warnings. Floodline: 0345 988 1188.
- What is in force now: flood warnings UK · river levels.
- Never walk or drive through flood water: why shallow water kills.
FAQQuestions people ask
Is Tonbridge and Malling at risk of flooding?
In Tonbridge and Malling, 3,279 of 67,465 properties (4.9%) 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 59th of 296 local authorities in England by number.
Which parts of Tonbridge and Malling have the most properties at flood risk?
Postcode district TN9 has the most: 1,469 properties at high or medium risk (15.6% of its properties in Tonbridge and Malling). The table on this page lists every district.
When did Tonbridge and Malling last flood?
The Environment Agency has mapped flood outlines on 10 dates in postcode districts that mostly lie in Tonbridge and Malling since 1927; the most recent started on 23 Dec 2013.
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.