Arctic sea ice hits its 2026 seasonal low, matching a decade of minimal extents

NASA and the National Snow and Ice Data Center reported that the Arctic sea-ice minimum on September 12, 2026 was about 4.6 million km², tying the tenth-lowest value in the satellite record alongside 2008, 2010 and 2025. The past two decades have seen every summer from 2007 onward rank among the 20 lowest minima, with the record low set in September 2012. Although September extents have shown a recent plateau, they stay well under the historical average, and the remaining ice is predominantly first-year, thinner ice.

Winter maximum ice in March 2026 also tied the lowest level recorded, matching 2025. Scientists attribute the long-term decline to a combination of natural variability and rising global temperatures, noting that an ice-free Arctic summer could occur before mid-century.