Atmospheric analysis

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

Mountainous areas are subject to heavy snowfalls, high winds, and low temperatures. Semi-permanent snow and ice fields exist at about 1000-1100 metres during winter.

How do hydro-electricity activities potentially influence waterway temperatures?

How do agricultural activities potentially influence water flows?

Last Updated: July 2025

NIWA collects and manages significant amounts of New Zealand's environmental data, particularly in the climate, freshwater, marine and atmosphere domains.

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.

These climate maps are updated daily and are based on data from our National Climate Database.

NIWA offers a range of standard toxicity tests for both freshwater and marine environments.

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