NIWA aims to provide the knowledge needed for the sound environmental management of our marine resources.

  • Sun, sand, and stingers

    Feature story
    Long hot days, sand between your toes, and jellyfish – all part of the New Zealand beach summer.
  • Storm-tide red-alert days 2024

    Storm-tide red-alert days 2024
  • Freshwater biosecurity

    Reducing the risk of new freshwater invasive species, minimising the impacts of these species, and developing methods for reducing or eradicating those populations.
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    Species Key – Coastal Taxonomic Resource Tool

    A web-based taxonomic resource tool has been developed to improve the accuracy and consistency in soft sediment estuarine and coastal benthic intertidal and shallow subtidal macroinvertebrate identification across New Zealand.
  • Tide envelopes

    Annual tide envelopes
  • Views from Houghton Bay on the South Coast of Wellington in the July 2022 storm that saw 130km/h winds and seven metre swells.

    Tide Forecaster

    NIWA's Tide forecaster provides tidal data for any point in New Zealand.
  • Image of Cook Strait bathymetric map

    Charts and posters

    NIWA posters, as well as bathymetry, sediment, and circulation charts. 
  • Pacific Rim


    Cam-Era is a network of computer-controlled cameras that monitor the New Zealand environment for research and resource management. These are also useful for surfers and swimmers.
  • Te Ukaipo o Hinemoana (Cumulative effects)

    Software Tool/Resource
    Online decision-support web mapping tools for informing the management of cumulative effects in the coastal and marine environment.
  • Higher and drier – the cost of raising homes

    Media release
    New research shows that in some cases, lifting houses may be a cost-effective way to reduce intermittent flooding risk.
  • Pacific atoll mangrove forests losing ground to sea-level rise

    Research Project
    Observations of a Pacific atoll mangrove forest by a NIWA-led research team suggests mangrove systems on oceanic atolls may lose the race to keep pace with sea-level rise.
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    Impacts of sediment on freshwater and estuarine and freshwater fish species