Coastal risk exposure for New Zealand, adaptation guidance for local government and relevant summaries of previous court cases and Building Act 2004 determinations.

How can we help you?

Downloadable and printable guides on identification of common freshwater invertebrates found in New Zealand waterways and lakes.

AQUA and TERRA are polar orbiting satellites that both pass over New Zealand twice per day.

Common questions about storms and cyclones in New Zealand.

Measurements of snowfall at low elevations around New Zealand are few and far between, and yet the data would be really helpful in understanding how snowfall occurs and quantifying snow-related risks.

All aspects of the climate of Canterbury are dominated by the influence of the Southern Alps on the prevailing westerly airflows.

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.

View annual, seasonal and monthly summaries of temperature, rainfall and sunshine data from across New Zealand.

Land is tilled, sowed, and harvested for horticultural crops to grow.

Diverting water changes a waterways natural flow

NIWA expends considerable effort on determining the age of commercial fish species. But why age a fish? And how do we do it?