ZURICH, SWITZERLAND / RankWire.AI / – In 2026, Switzerland’s glaciers saw a reduction of 5.5% in their ice mass, marking the country’s second-largest annual percentage decrease ever documented. This significant retreat followed a winter marked by low snowfall and a summer dominated by repeated heatwaves. Glacier Monitoring Switzerland, known as GLAMOS, recorded the extent of ice loss across the Swiss Alps during the 2026 monitoring season. According to the Swiss Academy of Sciences, nearly 20% of the national glacier volume has vanished over the past five years.
The winter of 2025 to 2026 was among Switzerland’s ten least snowy winters since systematic data collection began. Hot, dry conditions persisted from May through September, intensifying the stress on exposed glacier surfaces. The freezing level exceeded 4,000 metres on 76 days—more than double the average for the warm season. By September, researchers found no remaining snow at elevations around 3,500 metres in monitored zones.
On average, glacier thickness decreased by approximately 2.5 to 4 metres during the latest measurement period, with some glacier tongues losing as much as 10 metres of ice. Major glaciers like Allalin, Clariden, Great Aletsch, and Rhône experienced their most substantial melting since records began. Only 2022 recorded a greater percentage loss on the national scale in Switzerland’s extensive glacier history. The retreat impacted both high-altitude ice and lower sections across the Alps.
Decline of Smaller Glaciers as Alpine Ice Melting Accelerates
Several smaller glaciers, including Bella Tola in Valais and Griessfirn in Glarus, completely disappeared during the 2026 season. This disappearance underscores a broader trend of continuous ice loss throughout Switzerland’s Alpine regions. National data indicates glacier volume has decreased by nearly 20% since 2021. The recent decline follows multiple years of minimal snowfall and vigorous summer melting. Researchers observed widespread thinning across both large glaciers and smaller ice bodies.
Between July and September, glacier melt released approximately 2.2 trillion litres of water—more than four times the annual drinking water consumption of Swiss households. This meltwater flowed into Alpine rivers and water systems during a period of widespread summer drought. These figures highlight the enormous volume of ice transferred into Switzerland’s water cycle in just three months, with elevated summer temperatures further accelerating the seasonal ice loss at many monitoring sites.
2026’s Snow Conditions Differ from Record Meltdown Year
While 2026’s glacier losses did not surpass the record set in 2022, the conditions that year were even more severe. One key difference was the initial snow cover—many glaciers entered the 2026 melt season with slightly more snow than in 2022. Additionally, there was less Saharan dust settling on the snow during 2026, as cleaner snow reflects more sunlight, whereas darker dust-covered surfaces absorb more solar energy.
Despite these differences, Switzerland still recorded extraordinary glacier losses at both high elevations and lower tongues in 2026. Field surveys, snow measurements, and mass-balance observations confirmed widespread ice reduction through September’s end. The data revealed significant ice loss, the disappearance of smaller glaciers, and notable thinning across the country. This year ranks among the most severe in Switzerland’s glacier measurement history, adding to the recent trend of sharp contraction in the glacier system.