June 2025 mean sea level air pressure was higher than normal to the south of Aotearoa New Zealand, and mostly near normal over the country. This was associated with more easterly winds than normal for ...

Methane (CH₄) is New Zealand’s most significant greenhouse gas, making up over 50% of the country’s emissions, primarily from farmed livestock and waste facilities. Unlike CO₂, methane is more potent ...

Forecasting future weather starts by knowing what the weather is doing right now – everywhere in the world!

This research project is developing an energy-efficient, net-zero-emission process for wastewater denitrification.

Weather tells you what to wear each day, while climate tells you what types of clothes to have in your closet.

NIWA’s annual end-of-summer snowline survey has revealed continued loss of snow and ice for New Zealand’s famous glaciers.

Scientists have found a new ghost shark that lives exclusively in the deep waters of Australia and New Zealand. The Australasian Narrow-nosed Spookfish was described by NIWA Fisheries Scientist Dr ...

A blob of smoke from the Australian bushfires is continuing to circle the globe almost four months after it formed. Scientists around the world have been tracking the blob since it formed in December ...

Stories of tremendous forest fires, huge storm events, and suffocating heatwaves have dominated headlines over the past few years. We instinctively feel that our weather is getting wilder. Are we ...

NIWA is part of a multi-agency biosecurity response to an invasive seaweed discovered at Aotea Great Barrier Island and subsequently at Ahuahu Great Mercury Island.

The NIWA and MetService assessment of tropical cyclone activity indicates six to 10 named TCs could occur in the Southwest Pacific from November 2024-April 2025.

New maps from NIWA and the Deep South National Science Challenge show areas across Aotearoa New Zealand that could be inundated by extreme coastal flooding. They show a large storm-tide with the ...