NIWA / Earth Sciences NZ Open Data (ArcGIS Hub)
NIWA (Earth Sciences New Zealand) public geospatial open data hub for discovering and downloading science datasets in CSV, KML, GeoJSON, GeoTIFF and other formats, including hydrology and marine layers.
data-niwa.opendata.arcgis.com
At a glance
- Region
- New Zealand (Oceania)
- Coverage
- New Zealand
- Access
- Free
- Category
- Research Institute
- Last updated
- 2026
What's inside
- Hydrology
- Marine
- Geospatial
What you can do with it
Typical work that data of this type supports.
- 01
Design flows
Estimate 1-in-50 and 1-in-100 year floods for bridges, culverts and spillways.
Because it has: Hydrology
- 02
Low flows
Set environmental flows and check what is left in the river in a dry year.
- 03
Sea-level planning
Plan for sea-level rise and storm surge.
Because it has: Marine
Where AI adds value
Ideas for machine learning and AI agents built on this kind of data.
- 01
Flow forecasting
Train LSTM-style models on past records to forecast river levels and flow days ahead.
- 02
Ungauged basins
Combine with catchment data to estimate flow where there is no gauge.
- 03
Surge forecasts
Forecast surge and coastal water levels quickly.
Machine access and documentation
Open API
Esri ArcGIS Hub GeoServices REST, WMS/WFS
Licence: Open data
Listed in our registry of open water APIs, which WaterDataGPT can query live.
Related water data
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- NIWA Hydro Web PortalOceania | Free
- AODN Portal (Australian Ocean Data Network)Oceania | Free
- Auckland Council Environment Data PortalOceania | Free
- CAMELS-NZ: Hourly dataset for Aotearoa New ZealandOceania | Free
- Canterbury Maps Open Data - River Flow and Stage Monitoring Sites (New Zealand)Oceania | Free
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