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

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    Mean daily maximum temperatures (°C)

    These datasets are available in a range of formats.
  • El Niño maps and charts

    View a collection of maps showing the impact of past El Niño and La Niña events.
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    Summer Series 8: The forces behind beach ‘foam’

    News article
  • Assessment of crop and tree species growing potential using climate, soil and topographic information

    Research Project
    This project demonstrates how to assess high value alternative land-use options by means of a quantitative analysis of the growing potential of selected niche crops and tree species.
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    Piharau

    Piharau/kanakana are an important mahinga kai species and a prized delicacy for many Māori.
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    Lake Ōmāpere and the Utakura River

    Tuna harvested from Lake Ōmāpere and Utakura River catchment have long comprised an important fishery for tangata whenua.
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    Invertebrates and stream health

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    Map South

    Education Resource
    Most of this climate zone is characterised by cool coastal breezes, and absence of shelter from the unsettled weather that moves over the sea from the south and southwest.
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    What do we measure?

    Research Project
    A range of physical and chemical variables are measured in the NRWQN.
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    Tuna - identification

    There are several ways to tell the three New Zealand eel species apart.
  • Urbanisation

    Aotearoa’s main urban areas cover approximately 2% of total available land.