dataset · Wales

National Flood Hazard Maps - Present Day

The National Flood Hazard Maps for Present day, are based on generalised modelling only. The maps have been published to comply with the Flood Risk Regulations (2009) and the EU Directive (2007/60/EC), and used to inform the creation of Flood Risk Management plans across Wales. 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

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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 and direction) · flood hazard · flood extent · rivers flooding · sea flooding · surface water and small watercourse flooding
Coverage docs-verified: Wales
Update frequency docs-verified: annually
Access docs-verified: Free, open: no access restrictions; NRW may release, publish or disseminate it freely. Dataset page licence field is 'Not set'.

Useful for

Use cases llm-inferred: Screening flood depth, velocity and hazard at a Welsh site as context for a flood risk assessment · Mapping flood extent for a river, sea or surface water catchment as a drainage or site-constraints baseline · Identifying flood hazard context for a Welsh Flood Risk Management plan review
Audience llm-inferred: flood consultants · hydrologists · drainage engineers · GIS analysts · planners

Limitations

Constraints docs-verified: Based on generalised modelling only · No official status for Planning or Insurance purposes; use Flood Risk Assessment Wales Map or Development Advice Map/Flood Map for Planning instead · Scenarios assume no raised flood defences · Wales only

Evidence

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