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

  • National and regional climate maps

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

    Find out more about working at NIWA
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    Water resources and mining

    How may the activities of the mining industry influence water resources?
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    Mean 10cm earth temperature (°C)

    These datasets are available in a range of formats.
  • Coconut palms against the night sky in Tongatapu

    Island Climate Update

    Publication series
    A monthly summary of the climate in the tropical South Pacific islands, with an outlook for the coming months.
  • SolarView example

    An illustrated example, showing how to input data and interpret SolarView results.
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    Tuna - glass eels

    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.
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    Kākahi

    The kākahi or freshwater mussel was a valuable mahinga kai resource for many Māori.
  • Library

    Service
    The NIWA library collection contains items in a range of formats, covering subjects including atmospheric and climate research, aquaculture, oceanography, fisheries and marine sciences.
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    Mean monthly sunshine (hours)

    These datasets are available in a range of formats.
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    Map E North

    Education Resource
    Sheltered by high country to the west, the eastern zone of the North Island enjoys a dry, sunny climate.