The total area of the Arctic Ocean that was at least 15% ice covered each September (summer minimum) from 1979–2025. The last 19 September extents (2007-2025) are the 19 lowest on record. Data from the National Snow and Ice Data Center (NSIDC).
Sea ice concentration for September 2025, compared to the 1981-2010 average extent for that month (gold line). It was the tenth smallest summer minimum on record. Map by Climate.us, based on data from the National Snow and Ice Data Center (NSIDC).