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.

  • Bay of Plenty

    The topography of the North Island has a profound effect on the weather of the Bay of Plenty region.
  • Canterbury Wave Conditions

    Software Tool/Resource
    NIWA run a computer model which simulates wave heights across the Canterbury continental shelf and along the coast.
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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.
  • Publicly available data and publications

    Facility
    NIWA makes available and regularly updates results from several greenhouse gas measurement projects.
  • 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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    Mean relative humidity

    Dataset available for download
  • Analysis of water quality trends

    NIWA has developed a powerful software tool for the analysis of water quality data.
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    Summer Series 10: Super snapper! Delicious!

    News article
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    Tornadoes - how frequently do they hit New Zealand?

    News article
    Tornadoes, like the one that hit Auckland's western suburbs today, are relatively rare events in New Zealand.
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    Software tools

    NIWA develops and supplies custom software for environmental analysis and modelling.