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

  • Marine biosecurity

    Introduced pests and diseases can harm the health of Aotearoa New Zealand's marine ecosystems, our seafood industry, and the social and cultural benefits that we derive from the sea.
  • Extreme coastal flood maps for Aotearoa New Zealand

    Decisions about how we adapt to sea-level rise need to be based on information about our exposure to coastal flooding, both now and in the future after a period of rising sea levels.
  • Storm-tide red-alert days 2023

    Storm-tide red alerts are the highest high tide (also known as king tides) dates that Emergency Managers and Coastal Hazard Managers should write in their diaries and keep an eye on adverse weather (low barometric pressure, onshore winds), river levels and sea conditions (waves and swell). This page shows the 2023 dates of the highest high-tide "red alert" dates, and the lowest high-tide dates.
  • Ngā Waihotanga Iho - The Estuary Monitoring Toolkit

    Software Tool/Resource
    The main purpose of Ngā Waihotanga Iho is to provide tools for the public to measure environmental changes that occur in estuaries over time. These changes may occur due to natural processes and/or human activities.
  • Storm-tide red-alert days 2024

    Storm-tide red-alert days 2024
  • 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.
  • 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.
  • Colonial ascidians (grapes), crinoids (feather stars) and primnoid corals (orange) make up part of the Ross Sea ecosystem

    Biological traits

    Software Tool/Resource
    Based on the characteristics of individual organisms, Biological traits analysis is also a powerful way to measure ecosystem health and vulnerability to human activities.
  • NZTD - The New Zealand Trait Database for marine benthic invertebrates

    Software Tool/Resource
    Traits are defined as the components of organisms that can be measured and have an effect on ecosystem functioning. Examples of traits include the behaviour, life history, morphology, and physiology characteristics
  • eDNA research and services

    NIWA is active in a broad range of eDNA topics and can provide expert advice on applications and expected outcomes. We welcome inquiries into our services and can assist with experimental design.
  • Seaweed research and services

    NIWA has world-class expertise in marine macroalgae and extensive research on various aspects of seaweed ecology, growth and taxonomy.