nsidc.org

September 30, 2025
Antarctic sea ice maximum settles in third place
On September 17, Antarctic sea ice likely reached its annual maximum extent of 17.81 million square kilometers (6.88 million square miles). The 2025 maximum is the third lowest in the 47-year satellite record above 2023 and 2024.

Stand by for the Arctic SIE time series chart (averaged September summer minima since 1979) which will be published within the next few days by NSIDC. I’ll post it here as soon as its available, but I plan to stop passing on these polar sea ice reports after that. It all seems kind of pointless.