Update 12pm Friday 23 October 2020
We are aware of a technical issue, which means that some users may experience an error while accessing our maps. We are working to resolve the issue as soon as possible and are sorry for any inconvenience caused.
If you have an urgent concern about flood risk, please see our flood warnings and alerts service or call Floodline Call Floodline 0345 988 1188 - 24 hour service
Check if you're at risk
The Flood Risk Assessment Wales map shows your risk of flooding from:
- the sea
- surface water and small watercourses
The map also provides additional information about your area, such as:
- the location of flood defences
- the areas benefitting from flood defences
- shoreline management plans
You can also see all the areas we cover for free flood warnings and alerts.
Zoom into your location of interest to find out more
Development Advice Map
The Development Advice Map is for land use planning purposes and will be replaced by the new Flood Map for Planning in Spring 2021.
This should be used alongside Planning Policy Wales and Technical Advice Note (TAN) 15 to direct new development with respect to flood risk. Together, they form a precautionary framework to guide planning applications.
The map is based on Natural Resource Wales' extreme flood outlines (Zone C) and the British Geological Survey drift data (Zone B). Zone B data originally published 2004, updated in 2017, Zone C data revised quarterly.
The online maps shown here are limited to a scale above 1:25,000 and not designed for small-scale investigations but as a trigger for policy advice in TAN 15.
National Flood Hazard and Risk maps
The National Flood Hazard and Risk maps show flood extent, depths, velocities and hazard. It doesn't have any official status for planning or insurance purposes.
The national flood hazard and risk maps are used to inform the creation of Flood Risk Management plans across Wales and comply with the Flood Risk Regulations (2009) and the EU Directive (2007/60/EC).
If you need to download GIS data, many of the map layers can be downloaded from 'Lle' the Welsh Government Portal for Open GIS data.
Other ways of finding out long term flood risk
- Call Floodline: 0345 988 1188
- Type talk: 0345 602 6340 (for the hard of hearing)
Contains Natural Resources Wales information © Natural Resources Wales and database right. All rights reserved. Some features of this information are based on digital spatial data licensed from the UK Centre for Ecology & Hydrology © UKCEH, the Environment Agency © EA and Getmapping Plc and Bluesky International Limited . Defra, Met Office and DARD Rivers Agency © Crown copyright. © Cranfield University. © James Hutton Institute. Contains OS data © Crown copyright and database right. Land & Property Services © Crown copyright and database right.