Pressure One of the main things we have to watch to understand the weather is the presence of low and high pressure. Areas with low pressure are usually associated with bad weather. If an area has low ...

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 ...

Overview 2024 was Aotearoa New Zealand’s 10th-warmest year on record. The 2024 nationwide average temperature calculated from NIWA’s seven station series was 13.25˚C, being 0.51˚C above the 1991-2020 ...

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

Cyclone Gabrielle - Hawkes Bay. NIWA's Jochen Bind surveying stop banks to assess flood water levels and stop bank breaches. The team also looked at what may have happened if the world was even hotter ...

January was Auckland's wettest month since records began, according to meteorologists. The Central Auckland Rainfall series recorded a total of 539 mm of rain at Albert Park, smashing the previous ...

November 2024 was characterised by a large belt of higher-than-normal mean sea level pressure that straddled Aotearoa New Zealand and the surrounding seas. This pressure setup resulted in a relatively ...

Microbes - such as those living in wetlands, landfills or the digestive tracts of livestock – are behind unprecedented spikes in methane emissions.

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 ...

NIWA is pleased with the announcement today by the Science, Innovation and Technology Minister of the Government’s response to a recent review of New Zealand’s weather forecasting system.

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 ...

A new study from NIWA has mapped outdoor air quality for Invercargill and Alexandra in more detail than ever before. Researchers found that outdoor air in the most polluted locations contained three ...