The New Zealand Drought Monitor is a system for keeping track of drought conditions across New Zealand based on a standardised climate index.

Trees are grown and converted into a range of useful timber and paper products.

Some commonly-asked questions about tornadoes in New Zealand.

View data that show reported target catch and estimated bycatch.

Last Updated: July 2025

The world’s oceans are acidifying as a result of the carbon dioxide (CO2) generated by humanity.

Rig shark is an important inshore commercial fish species in New Zealand, and we need to understand more about their habitats, movements, nursery grounds and vulnerability to human impacts to ensure they are managed sustainably and their productivity is enhanced.

Impacts of mining on water quality and mahinga kai.

Greenhouse gases are atmospheric gases that intercept long-wave (mainly infrared) radiation emitted from the Earth's surface.

NIWA has working relationships with hundreds of organisations in New Zealand and overseas.

These datasets are available in a range of formats.

El Niño accounts for less than 25 percent of the year-to year variance in seasonal rainfall and temperature at most locations in New Zealand.