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

Climate & Weather

Understanding our variable and changing climate is critical for managing resources and reducing risks.

  • Climate change and variability - report for the Greater Wellington Region

  • Climate change will cause more deaths from air pollution, study finds

    Media release
    New research estimates that if climate change goes unchecked 60,000 more people will die globally from air pollution in 2030 – just 13 years away.
  • So far, so stormy

    Media release
    Today’s low came spinning off the coast of Hawke’s Bay funneling strong winds through the Cook Strait and hitting Wellington region with strong winds before moving on to Taranaki and Auckland this afternoon.
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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.
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    What is the greenhouse effect?

    Education Resource
    The greenhouse effect is a warming of the earth's surface and lower atmosphere caused by substances which let the sun's energy through to the ground but impede the passage of energy from the earth back into space.
  • Regional climatologies

    A regional climatology is a summary of the typical weather and climate of a region, based on historical data observations made at climate stations located within the region.
  • Climate Change Vulnerability Assessment (CCVA)

    Service
    To prepare for changes in climate, our freshwater and oceans decision-makers need information on species vulnerability to climate change.
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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.
  • Blue Lake, St Bathans

    Seasonal

    Publication series
    Seasonal climate summaries from summer 2001 to the present.
  • Glaciers don't lie

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    Mean relative humidity

    Dataset available for download