Natural Resources Wales River Levels API
Real-time river, reservoir and coastal water-level monitoring data from NRW sites across Wales, exposed through a public River Levels API.
rivers-and-seas.naturalresources.wales
At a glance
- Region
- UK (Europe)
- Coverage
- Wales
- Access
- Free
- Category
- Government
- Last updated
- 2026
What's inside
- river level
- reservoir level
- coastal water level
What you can do with it
Typical work that data of this type supports.
- 01
Storage tracking
Follow storage and releases through the season.
Because it has: reservoir level
- 02
Change over time
See how lakes and wetlands have grown or shrunk.
- 03
Sea-level planning
Plan for sea-level rise and storm surge.
Because it has: coastal water level
Where AI adds value
Ideas for machine learning and AI agents built on this kind of data.
- 01
Storage from space
Estimate volume from satellite water area and altimetry.
- 02
Release decisions
Optimise releases against inflow forecasts.
- 03
Surge forecasts
Forecast surge and coastal water levels quickly.
Machine access and documentation
Open API
Public River Levels REST API (JSON); keyless
Licence: Open data
Listed in our registry of open water APIs, which WaterDataGPT can query live.
Related water data
- Andalusia Reservoir Viewer (datos.gob.es)Europe | Free
- ARPA Piemonte Rete Meteo-IdrograficaEurope | Free
- ARPAE Emilia-Romagna Open Data Meteo-Climate & HydrologyEurope | Free
- BODC / National Oceanography Centre Linked Systems ERDDAPEurope | Free
- data.gov.uk - Hydrological Open Data (Environment Agency)Europe | Free
- datamap.gov.wales - Natural Resources Wales River Levels APIEurope | Free
Find more water data
Search and compare 1,900+ water data sources by region, type and access.