Maps of average annual rainfall, temperature and other climate variables have been produced for all of New Zealand, based on the period 1981–2010.

When soils erode, sediments are washed into waterways.

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The climate of this area is greatly dependent on its exposure to weather systems from the Tasman Sea and the lie of the Southern Alps to the east.

Information about climate and weather and links to climate-related websites.

A monthly summary of the climate in the tropical South Pacific islands, with an outlook for the coming months.

NIWA collects a vast range of environmental information about New Zealand’s environment from the sky to the seafloor.

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.

Wood chips and plant material make pulp that is used to produce paper products.

This weekly update helps assess likelihood of extremely dry weather preceding a drought.