Hazards

HIRDS is a simple online tool that can estimate the magnitude and frequency of high intensity rainfall at any point in New Zealand.

Decisions about how we adapt to sea-level rise need to be based on information about our exposure to coastal flooding.

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.

This Toolbox helps you find out about the changing climate, what it might mean for your business, organisation or community and what you can do about it.

NIWA is using updated climate projections to help New Zealanders better understand climate-related risks.

Storm-tide red-alert days 2024

We combine capabilities in weather, wave, storm surge and tide forecasting with tide gauge observations.

NIWA is using serious games to look at problems holistically, support understanding and give a framework for adaptation decisions.

Coastal risk exposure for New Zealand, adaptation guidance for local government and relevant summaries of previous court cases and Building Act 2004 determinations.

To prepare for changes in climate, our freshwater and oceans decision-makers need information on species vulnerability to climate change.

The New Zealand Palaeotsunami Database (Database) brings together all known information about tsunamis that occurred prior to written records.

This system combines daily sea-level data from NIWA, regional councils, port companies, Antarctica NZ, Bureau of Meteorology and territorial authorities.