Guides and other tools

NIWA makes many tools, resources and ID guides available.

  • Tide resources

    NIWA has a range of online tools and information relating to tides, including a tide forecaster, yearly tide envelopes and storm tide "red alert" days.
  • Cumulative effects

    Today’s marine ecosystems are under immense pressure from growing populations wanting more. From food provision to cultural and recreational opportunities, the increase in activity translates into more use of certain areas. Stressors can affect ecosystems in many ways.