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

Atmospheric analysis

NIWA has been using advanced scientific instruments to measure atmospheric trace gases and isotopes for over 50 years.

  • Waikato

    Waikato exhibits a range of climates due to the variety of landscapes in the region.
  • NZ's warmest and wettest winter on record

    Media release
    NIWA’s climate scientists can now confirm what you may have suspected. After carefully poring through more than a century’s worth of data, it has been officially determined that winter 2022 was Aotearoa New Zealand’s warmest and wettest on record.
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    What are whitebait?

    Whitebait are the juveniles of five species of galaxiidae, a family of fish confined to the Southern Hemisphere.
  • Chemical contamination

    Chemical contaminants are chemicals toxic to plants and animals in waterways.
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    NIWA Hydro Web Portal

    NIWA's Hydro Web Portal provides river flow and water quality monitoring data from NIWA’s Benchmark river monitoring network.
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    Virtual Climate Station data and products

    Virtual climate station estimates are produced every day, based on the spatial interpolation of actual data observations made at climate stations located around the country.
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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.
  • Freshwater monitoring and reporting

    Research Project
    NIWA's research on freshwater monitoring and reporting is one of three research areas within the 'Values, Monitoring and Outcomes' (VMO) programme led by Landcare Research.
  • SolarView example

    An illustrated example, showing how to input data and interpret SolarView results.
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    Kākahi

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