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

  • 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.
  • Coming from overseas?

    If you're moving to join us here at NIWA, we want to say thanks for choosing us by helping you with your big move.
  • Sea-level rise

    Education Resource
    One of the major consequences of climate change is rising global sea levels.
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    Climate mapping

    Read about how NIWA can map any aspect of climate to help guide your organisation's response to a changing and variable climate.
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    Mitigation and best practice options

    Some simple steps to minimise the effects of mining activities on water quality and mahinga kai.
  • Wellington science fair

    Science and Technology Fairs

    NIWA is a major sponsor of the Auckland, Manukau City, North Harbour, Waikato, Wellington, Canterbury and Bay of Plenty – Science & Technology Fairs.
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    Weather plots: temperature and relative humidity

    Objective: to observe the relationship between temperature and relative humidity.
  • Coldest seawater discovered

    Feature story
    The coldest seawater on earth could help scientists understand why Antarctic sea ice is growing in a warming world
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    Tuna aquaculture - New Zealand

    New Zealand's first eel farm was established in 1971. Despite other farms opening in later years, no eel farms remained by the start of the 1980s.
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    13 Beach types

    Learn about different kinds of beachs and how they form, with diagrams and examples of each type.