Switzerland’s glaciers lost 5.5% of their remaining ice in 2026, the second-worst melt year ever recorded, as scientists point to a brutal combination of summer heat and a bone-dry winter.
Story Snapshot
- Swiss glaciers lost 5.5% of their total ice volume in 2026, researchers say.
- It ranks as the second-largest annual loss on record, just behind 2022.
- A hot, dry summer and a low-snow winter drove the melt.
- Glaciers have shed nearly 20% of their volume since 2021.
- The findings come from Switzerland’s official glacier monitoring network and the Swiss Academy of Sciences.
Record-Level Melt Hits the Alps
The Glacier Monitoring Network in Switzerland, known as GLAMOS, and the Swiss Academy of Sciences released their annual report on October 1, 2026. It found Swiss glaciers lost 5.5% of their remaining ice volume this year. The average glacier thinned by 2.5 to 4 meters. Some glacier tongues lost as much as 10 meters of ice over the summer alone.
That kind of thinning does not happen by accident. It takes sustained heat working on ice for months, melting away layers that in some cases took decades to build up. The report places 2026 just behind 2022, which still holds the record for the single worst melt year since measurements began around 1960.
Heat and Dry Winter Drive the Numbers
GLAMOS and the Swiss Academy of Sciences attributed the loss to “an exceptionally warm, dry summer, and a winter with little snow”. Less snowfall in winter means less protective cover going into summer, so the ice underneath takes a direct hit once temperatures climb. The combination left glaciers more exposed than in a typical year, accelerating the melt researchers measured by the time the hydrological year closed.
Scientists involved in the report, including researchers Matthias Huss, Andreas Bauder, Andreas Linsbauer, and Matthias Barandun, tied the result to a broader multi-year pattern rather than a single freak event. The report frames 2026 as part of a run of hot, snow-starved years that have hit the Alps harder than in past decades.
Five-Year Decline Approaches One-Fifth
Zooming out, the report says Swiss glaciers have lost nearly 20% of their ice volume since 2021, with one tally putting the figure at 19.4%. That is a steep drop for a five-year stretch, and it puts 2026 in context: this was not an isolated bad year, but the latest entry in a run of years that have each chipped away at what is left of the ice. The 2022 season remains the single worst year on record, with some accounts citing a 5.9% to 6% loss that year alone.
What One Hot Summer Does and Doesn’t Prove
Glacier volume swings a lot from year to year because weather, not just climate, drives the headline number. A single hot, dry summer can produce a dramatic annual figure that sits far above or below the longer-run average, which is exactly why 2022 and 2026 stand out as back-to-back record and near-record years rather than a smooth, steady decline. The report itself does not break down how much of the 2026 number came from summer heat versus the dry winter, leaving the two factors described but not separately measured.
That distinction matters for anyone trying to size up what these numbers mean going forward. A one-year spike tied to an unusually hot summer is a different story than a steady year-over-year grind, even if both show up in the same report. The five-year trend of nearly 20% loss is the figure worth watching, since it smooths out the swings that any single summer can produce.
Swiss officials and scientists have been blunt about where they think this is headed, with some warning the Alps could lose nearly all remaining glacier ice within 10 to 15 years if current trends hold. Whatever one makes of that long-range prediction, the measured numbers behind the 2026 report are not in dispute: Switzerland’s ice shrank fast this year, and it has shrunk even faster over the last five.
Sources:
youtube.com, bbc.com, wusf.org, france24.com, bloomberg.com
