How fast are New Zealand's oceans warming compared to the global average?

According to the report, the seas around New Zealand are warming 34% faster than the global average.

What other changes are occurring in New Zealand's oceans due to climate change?

The report found that sea levels are rising, accelerating the threat to thousands of coastal homes, and marine heatwaves are becoming more frequent, intense, and longer-lasting.

How are the changes in New Zealand's oceans impacting the country's marine ecosystems?

The study indicates that many native species are struggling to adapt to the warmer and more acidic ocean conditions, and are at risk of being overrun by invasive pests.

Home / Environment / New Zealand's Oceans Rapidly Warming, Acidifying, and Rising

New Zealand's Oceans Rapidly Warming, Acidifying, and Rising

8 Oct, 2025

•

Summary

Oceans around New Zealand warming 34% faster than global average
Sea levels rising, threatening thousands of coastal homes
Marine heatwaves becoming more frequent, intense, and longer-lasting

New Zealand's Oceans Rapidly Warming, Acidifying, and Rising

According to a report released on October 8th, 2025, the oceans surrounding New Zealand are undergoing significant changes due to the impacts of climate change. The study, conducted by the government, found that the seas around the island nation are warming 34% faster than the global average.

This rapid warming is driving other concerning trends, including accelerating sea-level rise that is already threatening thousands of coastal homes. Marine heatwaves are also becoming more frequent, intense, and longer-lasting, putting pressure on New Zealand's native marine species.

The report links these changes to disruptions in the vast oceanic currents that flow between New Zealand and Antarctica. Researchers say the country's proximity to these currents, as well as shifts in atmospheric circulation, are key factors behind the disproportionate warming of the surrounding waters.