Our Services

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

An easy-to-use system for recording instream structures and assessing their likely impact on fish movements and river connectivity.

An interactive webtool to support barrier prioritisation and fish passage environmental reporting. 

Free sources of weather and climate information and data from NIWA.

Obtain NIWA35 forecast data from NIWA.

Storm-tide red-alert days 2024

Whether you need weather or climate information six hours, days or months out, our accurate forecasts can help you with operational requirements and decision making.

This is the home for NIWA's UV and ozone research, including maps and graphs showing daily predictions and measurements for UV levels across New Zealand.

Plots of today's UV index are available in graphical form for Auckland, Wellington, Christchurch, Lauder and Invercargill.

NIWA's Tide forecaster provides tidal data for any point in New Zealand.

NIWA Weather is NIWA's public facing weather forecasting website. You'll find 2-day, hour-by-hour forecasts for locations across Aotearoa New Zealand, as well as forecast videos by our in-house meteorologists, animations showing rain forecasts, tide forecasts and NIWA's daily UV index.

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