The best time to visit Interlaken depends entirely on whether you prefer "peak summer" alpine meadows or a "winter wonderland" experience. In 2026, the peak summer months of July and August offer the most reliable weather for hiking and paragliding, with temperatures averaging a pleasant 18°C to 24°C. This is the prime time for lake cruises on Lake Thun and Lake Brienz. However, if you are looking to avoid the massive crowds and high prices, the "shoulder seasons" of late May to June and September to early October are considered the "goldilocks" periods; the air is crisp, the wildflowers are in bloom (or the larch trees are turning gold), and most mountain lifts are still operational. For winter sports enthusiasts, January and February are the best months, as Interlaken serves as a perfect "base camp" for the Jungfrau Region’s ski resorts like Grindelwald and Wengen. While Interlaken itself rarely gets heavy snow on the valley floor, the surrounding peaks are guaranteed to be white, and the town hosts festive Christmas markets in December.