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

SST anomalies for December 2013

Surface temperature anomalies (ºC) for December 2013, data is from the NOAA OISST Version 2 dataset, available at the NOAA’s Climate Data Center (ftp://ftp.cdc.noaa.gov/Datasets/noaa.oisst.v2.highres/).