MAY TO OCTOBER
Interlaken's Canyoning Season, Month by Month
Canyoning around Interlaken runs on snowmelt, not a calendar — here's how the season actually unfolds from the first spring thaw to the October close.
See canyoning trips on GetYourGuide ↗Why the season is short
The Bernese Oberland's canyons are fed almost entirely by snowmelt and glacial runoff, so the season only opens once the worst of the spring melt has passed and water levels settle into a manageable, predictable range — typically some point in May, though the exact date shifts from year to year depending on how heavy and how late the preceding winter's snowpack was. It closes again around early October as temperatures drop and operators wind down for autumn. Outside that rough window, most canyons simply aren't running at all, whatever a calendar or a hopeful booking search might suggest.
Early season: May and June
Water is at its coldest and highest in late spring, still carrying the tail end of the melt down from higher altitude, so some of the more exposed or technical canyons stay closed later into June than the gentler, more sheltered ones do. What you get in exchange for the colder water is a genuinely dramatic, powerful gorge — waterfalls running noticeably fuller than they will by midsummer — plus thinner crowds than July and August bring. It tends to suit confident swimmers more than nervous first-timers, since the current and flow are livelier than later in the season.
Peak season: July and August
This is the stretch when the water has warmed the most, flows have settled into their steadiest and most predictable pattern, and essentially every canyon in the region is open and running full trips daily, including the harder, longer descents that stay closed earlier in the year. It's also, unsurprisingly, when Interlaken itself is at its busiest and the best-known canyons — Grimsel especially — book out furthest in advance among both locals and visiting tour groups. If your travel dates are flexible, this stretch offers the most reliable water conditions and by far the widest choice of canyon and difficulty level.
Late season: September into October
Flows drop back and the water cools again as autumn properly sets in, and the alpine light turns the gorges a completely different colour — lower, warmer sun, golden valley walls above the rock. Some of the higher or more weather-exposed canyons start closing for the year as September wears on, so the choice of open canyons narrows noticeably compared with the full midsummer lineup. It's a quieter, cooler version of essentially the same trip, and worth strongly considering if avoiding crowds matters more to you personally than having the warmest possible water underfoot.
Weather can override any of this, on any given day
Season aside, a single heavy storm can raise a canyon's water level within a matter of hours and take it out of action for a day or more, entirely regardless of what month it is or how settled the water had been the day before. This is standard operating practice today, not a red flag about the operator you've booked — it's the direct legacy of how seriously the region now treats sudden, unpredictable water-level changes. Build a spare day of slack into your itinerary wherever possible, since a weather reschedule is always far better than a trip that runs when conditions say it shouldn't.
More things to do nearby
Not sure which canyon, or whether it's for you?
Leave your email and roughly when you're travelling — we'll send a short rundown of how the Interlaken canyons compare, which suit first-timers versus thrill-seekers, how cold the water is, and what a half-day actually involves.