dataset · Wales

National Flood Hazard Maps - Climate Change

The National Flood Hazard Climate Change maps are based on generalised modelling only. These maps use the same base information as the Present Day Hazard Maps, but include an allowance for Climate Change (2120). These maps have no official status for Planning or Insurance purposes, therefore the public and professionals are advised to use the information contained within the Flood Risk Assessment Wales Map, the Development Advice Map / Flood Map for planning (as appropriate) for these purposes a

Visit source ↗

Source details

Licence: ["There are no access restrictions on this data. NRW may release, publish or disseminate it freely.", "\u00a9 CNC/NRW. Some features of this information are based on digital spatial data licensed from

Evidence quality: 45.1

Listed in data.gov.uk public catalogue API on 2026-10-16; relevance/value screened (haiku).

Metadata checked: 2026-10-14T13:20:00.000Z

What's in it

Data offered docs-verified: flood depth · flood velocity (speed) · flood hazard · flood extent · flooding from rivers · flooding from the sea · flooding from surface water and small watercourses
Coverage docs-verified: Wales · Climate change allowance for 2120 (single projection year)
Update frequency docs-verified: annually
Access docs-verified: Free and open: no access restrictions; NRW may release, publish or disseminate freely. Attribution: © CNC/NRW. Some features based on digital spatial data licensed from (truncated in entry).

Useful for

Use cases llm-inferred: Climate-change sensitivity screening of future flood hazard and depth for Welsh development sites, as a non-statutory supplement to the FRA · Long-term resilience and adaptation appraisal for drainage and civils schemes in Wales (2120 depth and velocity inputs) · Comparing present-day and climate-changed flood hazard extents to scope Welsh flood risk options
Audience llm-inferred: flood consultants · hydrologists · drainage engineers · civils engineers · planners · GIS analysts

Limitations

Constraints docs-verified: Based on generalised modelling only · No official status for planning or insurance purposes; use the Flood Risk Assessment Wales Map or Development Advice Map / Flood Map for those · Wales only (extent 51.384° to 53.427° N) · Climate change uplift uses the Welsh Government 2018 central estimate for 2120, so it may not reflect later guidance · Single climate change scenario (2120); no other time horizons documented

Evidence

Check upstream coverage, uncertainty and licence before use. Station observations are not forecasts or design levels.