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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    Other Climate data products

    Short-term to long-term data estimation
  • High Performance Computing Facility

    Facility
    The High Performance Computing Facility (HPCF) is supercharging New Zealand science.
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    Mean daily global radiation (Mj/sq m)

    These datasets are available in a range of formats.
  • Wave action

    Feature story
    New Zealand’s coast is sculpted by ocean waves. Some wave conditions bring joy to surfers and beachgoers, but, at other times, waves can cause major hazards at sea or along the shore.
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    Trawl fisheries bycatch

    Accurate reporting on the amount of fish and invertebrates that are caught and discarded by New Zealand’s commercial fishing industry is vital to effective management of these fisheries.
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    Tuna

    Tuna or freshwater eels are a very significant, widely-valued, heavily-exploited, culturally iconic mahinga kai resource.
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    Tuna - elvers and recruitment

    Once in freshwater, glass eels develop into darker pigmented juvenile eels known as elvers.
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    What do 'carbon neutral' and 'carbon footprint' mean?

    A carbon neutral activity is one that has a carbon footprint of zero.
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    Water clarity

    Water clarity or turbidity is the cloudiness or haziness in a fluid caused by individual small particles (suspended solids).