A weekly update describing soil moisture patterns across the country to show where dry to extremely dry conditions are occurring or imminent. Regions experiencing significant soil moisture deficits ...

Temperature Temperatures were well above average (>1.20°C above average) for Central Otago and western Tasman. Above average temperatures (0.51-1.20°C above average) were recorded for Southland, ...

The atmosphere is comprised of layers based on temperature. These layers are the troposphere, stratosphere, mesosphere and thermosphere. A further region at about 500 km above the Earth's surface is ...

This work is licensed under a Creative Commons Attribution 4.0 International License. These maps (click for full sized versions) are updated daily and are based on data from our National Climate ...

Effective flood preparation and response requires detail beyond river flows. We need to forecast where it will flood, and when. But the physical models used to map flood are very slow, taking up to 24 ...

Home Freshwater Stopping the gold clam: It's now or never Develop a suite of control tools Under Cover: Evaluating Benthic Barriers as a control tool The invasive gold clam (Corbicula fluminea) is ...

A New Zealand-led team has completed the fullest investigation to date into January’s eruption of the underwater Tongan volcano. Hunga-Tonga Hunga-Ha'apai (HT-HH) emitted the biggest atmospheric ...

A new NIWA-led study has found that climate change increased the amount of total rainfall during Cyclone Gabrielle by 10%. This additional rain fell during the most intense parts of the storm, ...

Thirty eight scientists and crew will set sail today for Antarctica on NIWA’s research vessel Tangaroa, with the aim of going as far south as the Ross Ice Shelf - a first for the ship. The ship, with ...

The website Ian Wishart has based his opinions on is not New Zealand’s national climate database. Wishart has conflated the Historic Weather Events website with the New Zealand National Climate ...

The tables below show the probabilities (or percent chances) for each of three categories: above average, near average, and below average. In the absence of any forecast guidance there would be an ...

Seven nations sharing world’s longest mountain range already impacted by climate change Climate change is already reshaping life and landscapes across the world’s longest mountain range which extends ...