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

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

Read about how NIWA can map any aspect of climate to help guide your organisation's response to a changing and variable climate.

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

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

NIWA is a major sponsor of the Auckland, Manukau City, North Harbour, Waikato, Wellington, Canterbury and Bay of Plenty – Science & Technology Fairs.

Objective: to observe the relationship between temperature and relative humidity.

Casal2 is an advanced software package developed by NIWA for modelling the population dynamics of marine species.

NIWA has transformed 1.5 million square kilometres of data into the most accurate and detailed map yet of the land underneath the sea around New Zealand.

How healthy is your stream? SHMAK - the New Zealand Stream Health Monitoring and Assessment Kit - has been designed to help you find out.

One of the most common species of freshwater fish in Aotearoa is the common bully or toitoi.

A list all of New Zealand's freshwater fish species.