On 1 July 2025, NIWA merged with GNS Science to become Earth Sciences New Zealand.

Differences from average global sea surface temperatures for 4th of May 2014 to 31st of May 2014. Map courtesy of NOAA Climate Diagnostics Centre (http://www.cdc.noaa.gov/map/images/sst/sst.anom.month.gif).

Differences from average global sea surface temperatures for 4th of May 2014 to 31st of May 2014. Map courtesy of NOAA Climate Diagnostics Centre (http://www.cdc.noaa.gov/map/images/sst/sst.anom.month.gif).