Global Glaciers Experienced Fourth Consecutive Year of Net Ice Loss in 2025

In 2025, the world’s glaciers experienced their fourth consecutive year of net ice loss, as detailed in the World Meteorological Organisation’s (WMO) State of Global Water Resources 2025 report. Between October 2024 and September 2025, glaciers lost approximately 408 ± 132 gigatonnes of mass, equivalent to a 1.1 ± 0.4 mm rise in sea level.

Six of the seven largest annual glacier mass losses on record have occurred in the past seven years. Regions including Central Asia, South Asia West, Russian Arctic, Iceland, and Western Canada and USA recorded mass balances among their three most negative years. Since 2000, mountain glaciers have lost 6.2 percent of their ice mass, with some regions showing decreases of up to 40 percent over several decades.