Atmospheric analysis

Understanding climate and climate change.

NIWA’s climate scientists can now confirm what you may have suspected. After carefully poring through more than a century’s worth of data, it has been officially determined that winter 2022 was Aotearoa New Zealand’s warmest and wettest on record.

Some simple steps to minimise the effects of wastewater on water quality and mahinga kai.

Descriptions of the common terms that explain the processes that occur in hydrology.

Raglan B Cam-era station

NIWA's research on freshwater monitoring and reporting is one of three research areas within the 'Values, Monitoring and Outcomes' (VMO) programme led by Landcare Research.

A summary of up-coming tropical cyclone seasons, issued 6-monthly.

Glass eels (about 5.5 to 7.0 cm) arrive in fresh water during spring, especially during September and October, although they may be present from July to December.

Short-term to long-term data estimation

The High Performance Computing Facility (HPCF) is supercharging New Zealand science.

These datasets are available in a range of formats.