Thanks to
MySwitzerland,
there is an interactive map that shows current and forecast leaf coloration throughout Switzerland.
It is updated twice a week from the beginning of September to mid-November. The data basis consists of current surveys on drought, heat and precipitation.
The previous year's autumn data and the extensive expert knowledge of the SRF Meteo team are also incorporated into the forecast.
You can find even more events and excursions in the fall
HERE.