August’s sunrise at 6:15 AM and temperatures of 17–25°C (63–77°F) mean summer is still in full swing. Swiss National Day on August 1 brings fireworks, bonfires, and lantern processions. The Trucker & Country Festival and Ballenberg’s summer events add to the festive mood. Mountain trains, lake cruises, and adventure sports are all running. Crowds remain high, especially around National Day, so book ahead for accommodation and activities. Evenings are warm and perfect for outdoor dining or a stroll along the lakes.
Pro tips for visiting Interlaken in August
• Book accommodation and lake cruises at least a month ahead for Swiss National Day—rooms and tickets sell out quickly. • Go early to Höhematte for the best views of National Day fireworks and bonfires—arrive by late afternoon to claim a spot. • Reserve adventure activities 2–3 days in advance—paragliding and rafting are in high demand. • Head to Ballenberg on weekdays for summer events—weekends are busiest with families and tour groups. • Avoid driving in town during festivals—streets close for parades and parking is limited. • Choose early morning for mountain excursions—afternoon storms can disrupt plans. • Pack for both sun and rain—weather is changeable even in high summer. • Visit local bakeries for Zwetschgenwähe (plum tart) and fresh berries in season.
Interlaken in August at a glance
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Weather
Maximum temperature: 25°C
Minimum temperature: 17°C
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Daylight
Around 14 hours 25 minutes of daylight
Sunrise: 6:15am
Sunset: 8:40pm
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Key events
Swiss National Day (Bundesfeier), Ballenberg Open-Air Museum Summer Events, Harder Kulm Funicular Season, St. Beatus Caves Season
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Crowds
Tourist-heavy, with long queues at attractions, crowded streets, and seasonal events adding to the buzz.
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What to pack
Light layers, shorts, t-shirts, hiking boots, sunblock, rain jacket, Swiss flag (for National Day), swimsuit, picnic gear.
