ZURICH, SWITZERLAND / RankWire.AI / – In 2026, Switzerland’s glaciers saw a decrease of 5.5% in their total ice mass, marking the nation’s second-largest yearly percentage loss on record. The shrinkage followed a winter characterized by limited snowfall and a summer dominated by repeated heatwaves. Glacier Monitoring Switzerland, known as GLAMOS, assessed the extent of ice loss across the Swiss Alps during the 2026 observation period. The Swiss Academy of Sciences reported that nearly 20% of the country’s glacier volume has vanished over the past five years.
The winter months of 2025 to 2026 ranked among Switzerland’s ten least snowy winters since systematic data collection began. Hot and dry conditions persisted from May through September, intensifying the pressure on exposed glacier surfaces. The freezing level rose above 4,000 metres on 76 days—more than double the average for the warm season. By September, researchers observed no remaining snow at elevations around 3,500 metres in monitored zones.
During this period, average glacier thickness decreased by roughly 2.5 to 4 metres. Some glacier tongues experienced ice loss of up to 10 metres. Notable glaciers such as Allalin, Clariden, Great Aletsch, and Rhône recorded their most significant melt since measurements began. Only 2022 saw a larger national percentage loss in Switzerland’s long-term glacier record. This extensive retreat impacted both the high-altitude ice and the lower sections across the Alps.
Decline of Smaller Glaciers Signals Deepening Alpine Ice Retreat
During the 2026 season, several smaller glaciers completely vanished, including Bella Tola in Valais and Griessfirn in Glarus. Their disappearance contributes to a broader ongoing trend of persistent ice reduction throughout Switzerland’s Alpine regions. According to national data, glacier volume has decreased by nearly 20% since 2021. The recent shrinkage results from multiple years of minimal snow accumulation coupled with intense summer melting. Researchers observed widespread thinning across both large glaciers and smaller ice bodies.
The melting process released approximately 2.2 trillion litres of water between July and September. This volume exceeded four times the annual drinking-water needs of Swiss households. The meltwater fed into Alpine rivers and water systems during a notably dry summer period. These figures highlight the immense volume of ice transferred into Switzerland’s water cycle over just three months. Elevated summer temperatures further accelerated ice loss across many sites monitored.
2026’s Snow Cover Conditions Differ from Record Melt Year
Although the melt in 2026 was significant, it remained below the record set in 2022, when glacier conditions were even more severe. One factor distinguishing 2026 was the snow cover at the start of summer, which was slightly more extensive than in 2022 on many glaciers. Additionally, fewer Saharan dust particles settled on the snow during 2026. Cleaner snow reflects more sunlight, while surfaces covered with darker dust absorb greater solar energy.
Despite these differences, Switzerland experienced extraordinary glacier loss across both high elevations and lower tongues in 2026. Field surveys, snow measurements, and mass-balance observations documented extensive changes through September’s end. The data revealed widespread ice loss, the disappearance of smaller glaciers, and significant reductions in thickness across the country. These findings place 2026 among the most severe years in Switzerland’s glacier measurement history. The recent figures add to a pattern of sharp contraction in the glacier system over recent years.