New Zealand is experiencing mounting climate pressures that pose threats to the environment, native species, and communities, according to the Our Atmosphere and Climate 2026 report released this week. The nation’s annual average temperature has risen by 1.36 degrees Celsius since records began in 1909, with seven of the 10 warmest years on record occurring in the last decade, indicating a significant baseline shift with far-reaching consequences across natural systems, communities, and economic sectors.
Glacier decline represents a particularly concerning trend. New Zealand’s approximately 3,000 glaciers have shrunk substantially, declining in volume from 56 cubic kilometers in 1997 to 30 cubic kilometers in 2023. Projections indicate further substantial losses ahead, with modeling suggesting glaciers could lose between 14 and 86 percent of their volume by 2100 under lower emissions scenarios, rising to between 69 and 100 percent under higher emissions scenarios.
Greenhouse gas concentrations in the atmosphere have reached record levels. Carbon dioxide has increased by 30 percent since monitoring began in New Zealand in 1972, while methane levels reached their highest concentration ever in 2025. These atmospheric changes are driving rising temperatures, warming oceans, sea level rise, and shifting precipitation patterns, alongside more intense extreme weather events.
The report identifies multiple climate-related hazards likely to intensify. Heatwaves are projected to increase in frequency, length, and intensity nationwide, with the number of days exceeding 25 degrees Celsius very likely to rise by 2050, exposing populations to heat-related health risks. Marine heatwaves are affecting native species, with 2025 data showing New Zealand’s oceans warming 34 percent faster than the global average, linked to mass sea sponge bleaching, southern bull kelp die-offs, large-scale fish strandings, and penguin deaths.
The report, a three-yearly update from the Ministry for Cities, Environment, Regions and Transport and Stats NZ, warns of additional climate impacts including damaging storms and cyclones, droughts affecting agriculture and species, and sea level rise threatening coastal infrastructure and housing. Māori communities face reduced access to culturally significant locations. Officials note that New Zealand’s development occurred under relatively stable climate conditions, presenting challenges as those conditions shift fundamentally.
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