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Mean number of days of ground frost
These datasets are available in a range of formats. -
Virtual Climate Station data and products
Virtual climate station estimates are produced every day, based on the spatial interpolation of actual data observations made at climate stations located around the country. -
Hotspot Watch Updates
This weekly update helps assess likelihood of extremely dry weather preceding a drought. -
Map Chatham
Education ResourceExtremes of temperature are rare as the Chatham Islands are small land masses surrounded by sea. -
What is ocean acidification?
Education ResourceOcean acidification is the name given to the lowering of pH of the oceans as a result of increasing carbon dioxide (CO2) in the atmosphere. -
Regional climatologies
A regional climatology is a summary of the typical weather and climate of a region, based on historical data observations made at climate stations located within the region. -
NIWA staff profile: Nava Fedaeff
Feature story06 June 2017At the age of seven, NIWA’s youngest climate scientist, Nava Fedaeff, swapped sub-arctic Siberia for balmy Auckland – and her first job was to learn to swim. -
Tuna - glass eels
Glass eels (about 5.5 to 7.0 cm) arrive in fresh water during spring, especially during September and October, although they may be present from July to December. -
National and regional climate maps
Research ProjectMaps of average annual rainfall, temperature and other climate variables have been produced for all of New Zealand, based on the period 1981–2010. -
The impact of El Niño and La Niña on New Zealand's climate
El Niño accounts for less than 25 percent of the year-to year variance in seasonal rainfall and temperature at most locations in New Zealand.