May’s sunrise at 5:55 AM and temperatures from 12–19°C (54–66°F) bring warm spring days and clearing hiking trails. Ascension Day and Whitsun create local spikes in visitors, while the International Museum Day offers free entry to the Touristik-Museum. The first lake swims and picnics appear, and late May feels almost like summer. Pollen peaks, so allergy sufferers should prepare. The landscape is lush, with waterfalls at full flow and mountain meadows in bloom. Crowds are moderate, and prices are lower than summer.
Pro tips for visiting Interlaken in May
• Book accommodation 2–3 weeks ahead for Ascension Day and Whitsun weekends—local families fill hotels and restaurants. • Go early to the Touristik-Museum on International Museum Day for free entry and fewer visitors. • Choose midweek for quieter hiking trails—weekends are busier with domestic tourism spikes. • Head to Bönigen’s lake beach for the first swims and picnics—water is cold but refreshing. • Avoid high-altitude hikes in early May—some snow may linger above 2,000 m. • Reserve allergy-friendly rooms if sensitive to pollen—May is peak season for grass and tree pollen. • Pack a picnic from Coop/Migros for lakeside lunches—cheaper and scenic. • Check local event calendars for Alpaufzug (cattle ascent) processions in late May for a unique Swiss experience.
What to eat in Interlaken in May: Seasonal delicacies
1/5
Brienzersee Felchen [Lake Brienz whitefish]
Lake Brienz whitefish, pan-fried or smoked, returns in May season, eat lakeside, pair with salad.
