On 1 July 2025, NIWA merged with GNS Science to become Earth Sciences New Zealand.

  • Working with schools

    We sponsor regional science and technology fairs around New Zealand and support learning programmes that bring science into the classroom.
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    Mean monthly wet-days

    These datasets are available in a range of formats.
  • Special Climate Statement 2017-18 Summer

    Sea surface temperatures in the southern Tasman Sea rose to exceptionally high levels in late 2017 and early 2018. These temperatures were far above any others previously observed at that time of year in the region, and extended west from New Zealand to Tasmania and mainland southeast Australia.
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    Map I South

    Education Resource
    The climate of this zone is largely dependent on the lie of the Southern Alps to the west, but many areas are also sheltered by high country to the south and east.
  • Tornado damage Whenuapai.

    Extreme weather - winds and tornadoes

    Education Resource
    Due to its position in the 'Roaring Forties', a belt of strong winds in the Southern Hemisphere which generally occur between the latitudes of 40 and 49 degrees, as well as its small size, New Zealand is a windy country.
  • Other vessels

    Facility
    NIWA operates about 30 other Maritime New Zealand-certified vessels based at Bream Bay, Auckland, Hamilton, Rotorua, Turangi, Wellington, Nelson, Greymouth, Tekapo, Christchurch, and Dunedin.
  • Waikato River

    River Environment Classification

    The River Environment Classification (REC) is a database of catchment spatial attributes, summarised for every segment in New Zealand's network of rivers.
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    Water temperature and hydro

    How do hydro-electricity activities potentially influence waterway temperatures?
  • Glaciers don't lie

  • Statement of Corporate Intent

    This Statement of Corporate Intent (SCI) sets out NIWA's strategy for delivering against its core purpose over the next five years.
  • Tuna information resource

    Tuna, or freshwater eels, are the most widespread freshwater fish in New Zealand. This 'living' educational resource summarises a large amount of scientific and technical literature.