Arctic sea ice reaches record low extent in 2026

Arctic sea ice reached its annual minimum extent on September 12, 2026, covering approximately 4.6 million square kilometers. This figure ties the minimums recorded in 2008, 2010, and 2025, marking the 10th-lowest level since satellite monitoring began in 1978.

Satellite observations reveal a long-term decline in ice thickness and extent, with every summer from 2007 through 2026 ranking among the 20 lowest September extents on record. While the melt season has lengthened by approximately 40 days compared to 1979, researchers from NASA note that the duration of this melt season has remained relatively steady since around 2010.

This stabilization in the melt season duration is attributed to changing cloud patterns and increasingly thin ice. The primary driver of the extended melt season has been later freeze-ups in the fall rather than earlier spring melts. Scientists observe that the loss of multiyear ice has led to increased variability in seasonal ice conditions.