June’s warm, sunny days (15–25°C) and daylight from 5:30am to 9:25pm kick off festival season. Greenfield Festival and Trucker & Country Festival fill the town, while paragliding and skydiving reach their peak. Lake Brienz and Thun are warm enough for swimming, and the William Tell open-air theatre begins. Crowds build quickly, so book accommodation and event tickets at least six months ahead. Afternoon thunderstorms are possible, but mornings are reliably clear for outdoor adventures.
Pro tips for visiting Interlaken in June
• Book Greenfield and Trucker & Country Festival tickets and accommodation 6+ months ahead; sell-outs are common. • Reserve William Tell theatre seats for Thursday or Saturday evenings; performances are in German with multilingual notes. • Go early for paragliding and skydiving; thermal conditions are best before midday. • Head to Lake Brienz for swimming and paddleboarding; water temperatures reach 18–20°C. • Avoid last-minute bookings during festival weekends; nearby towns like Spiez or Thun offer fast train access if Interlaken is full. • Choose mountain biking and hiking in the mornings to avoid afternoon thunderstorms. • Pack for variable weather—sunny mornings, stormy afternoons. • Use the Swiss Travel Pass for unlimited festival and lake travel.
What to eat in Interlaken in June: Seasonal delicacies
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Egli [perch fillets]
Perch fillets start in June, order fried with lemon and butter, eat lunch lakeside, book sunny weekends.
