September’s sunrise at 7:00 AM and temperatures of 14–20°C (57–68°F) bring crisp mornings and golden afternoons. The Jungfrau Marathon and Alpabzug cattle descents are highlights, along with wine harvests in Spiez. Crowds thin after the marathon, and hotel rates drop. Autumn colors begin to appear, and menus feature new cheeses and game. It’s the best month for photography and outdoor adventures, with full access to mountain trains and trails but fewer queues than summer.
Pro tips for visiting Interlaken in September
• Book accommodation 3+ months ahead for Jungfrau Marathon weekend—rooms fill quickly and prices spike. • Go early to Alpabzug cattle descents in Habkern or Beatenberg—processions start mid-morning and parking is limited. • Reserve spots for Spiez wine harvest tastings—cellars open on select weekends in September and October. • Head to mountain trails for autumn colors—photography is best in the golden afternoon light. • Avoid high-altitude hikes after mid-September—some lifts and huts begin to close for the season. • Choose Ballenberg Open-Air Museum for harvest-themed events—weekdays are quieter. • Pack for chilly mornings and warm afternoons—layers are essential. • Visit Interlaken Herbstmarkt in mid-October for cheese, honey, and crafts if staying into the next month.
Festivals and events in Interlaken this September 2026
