Switzerland’s glaciers lost 5.5% of their total ice volume in 2026, according to the annual assessment by the Glacier Monitoring Switzerland network (GLAMOS) and the Swiss Academy of Sciences (SCNAT). The loss ranks second only to 2022. Switzerland has now lost almost 20% of its glacier ice in five years.
Key Takeaways
- Between July and September, Swiss glaciers released about 2,200 billion liters of water. SCNAT says that is more than four times the annual drinking water use of every household in Switzerland.
- About 30 Swiss glaciers disappeared entirely during the summer of 2026.
- Ice thickness on some glacier tongues fell by as much as 10 meters over the summer.
- The Rhône Glacier lost four meters of thickness between mid-June and mid-July alone.
- Switzerland has lost more than 1,000 glaciers over the past 50 years, roughly 40% of its national total.
A Second Catastrophic Year in Five
The 2026 results confirm what glaciologists have warned for several seasons: extreme melt years in the Alps are becoming normal. The Swiss Academy of Sciences called 2026 another “catastrophic year.” It follows a 6% loss in 2022, 4% in 2023, and 3% in 2025.
Matthias Huss, director of GLAMOS, said the pattern itself is the most alarming part. Losses of this size, he noted, are now recurring year after year rather than standing out as one-off extremes.
In its joint statement with SCNAT, GLAMOS was blunt about the long-term outlook. “Alpine glaciers have no chance of surviving in the long term under such conditions,” the organizations said.
Why the Percentages Keep Rising
The 2026 figure needs some context. In absolute terms, the volume of ice lost this year was smaller than in the heat wave summer of 2003. But the percentage loss is higher, because Swiss glaciers now hold roughly one-third of the ice they held 23 years ago. In 2003, the same kind of summer removed 3.5% of the total.
That effect will keep strengthening. As the remaining ice shrinks, each hot summer takes a larger share of what is left. Annual percentage losses will look worse even if the absolute melt stays level.
Low Snow and Summer Heat Drove the 2026 Losses
Two factors combined to drive this year’s melt. Winter snowfall came in well below average. Snow cover protects glacier ice through the warmer months, so a thin snowpack exposed the ice earlier in the season. Summer heat waves then pushed melt rates sharply higher.
Early in the summer, Huss described 2026 as “surprisingly similar” to 2022. By mid-July, the Rhône Glacier had already lost four meters of thickness in a single month.
Conditions could have been worse. GLAMOS and SCNAT noted that less Saharan dust settled on the Alpine snow in 2026 than in 2022. Dust darkens snow and speeds melting, so its absence kept more snow reflective and slowed the loss somewhat.
Glacier Melt Is Temporarily Easing Summer Water Shortages
The water released between July and September carries consequences well beyond the mountains. About 2,200 billion liters of meltwater fed rivers that supply drinking water, farms, and hydropower across Switzerland and downstream into neighboring countries.
For now, that meltwater is helping to ease summer water shortages. But the relief is temporary. As glaciers shrink, the amount of meltwater they can supply during dry summers will eventually fall, leaving rivers that depend on it with less water in the months when demand is highest.
The Alps as a Global Climate Benchmark
Switzerland holds the largest share of glaciers in the European Alps, and its monitoring record is among the longest anywhere. That makes the Swiss data a reference point well beyond Europe. The same trends are visible from the Andes to the Himalayas, where glaciers supply water to hundreds of millions of people.
Shrinking ice also affects mountain stability. Huss has warned that glacier retreat can destabilize slopes, raising the risk of rock and ice collapses in Alpine valleys.
A Monitoring Network Built Over a Century
GLAMOS is run by ETH Zurich, the Universities of Zurich, Fribourg, and Lausanne, and the University of Applied Sciences and Arts of Southern Switzerland, with long-term support from the Swiss Federal Office for the Environment. SCNAT’s Swiss Commission for Cryosphere Observation coordinates national monitoring of snow, glaciers, and permafrost.
The network measures total ice volume every three years, with the next full inventory due in 2028. That survey will show how many more small glaciers did not survive the summers of 2026 and 2027.
Huss has said that if warming continues at the pace of recent decades, Switzerland will be left with only small remnants of ice by 2100.
FAQs
How much ice did Swiss glaciers lose in 2026?
Swiss glaciers lost 5.5% of their total ice volume in 2026, according to GLAMOS and the Swiss Academy of Sciences. It is the second-highest annual loss on record, behind 2022.
How much glacier ice has Switzerland lost in recent years?
Switzerland has lost almost 20% of its glacier ice over the past five years. The country has also lost more than 1,000 glaciers over the past 50 years, about 40% of its national total.
What caused the 2026 glacier melt in Switzerland?
Below-average winter snowfall left glaciers exposed early in the season, and summer heat waves then accelerated melting. Less Saharan dust than in 2022 limited the damage somewhat.
How much water did Swiss glaciers lose in summer 2026?
Between July and September, Swiss glaciers lost about 2,200 billion liters of water. That is more than four times the annual drinking water use of all Swiss households.
Will Swiss glaciers disappear completely?
GLAMOS and the Swiss Academy of Sciences say Alpine glaciers have no chance of surviving in the long term under current conditions. GLAMOS director Matthias Huss has said only small remnants may remain by 2100 if warming continues at its recent pace.
