What to Wear in Interlaken: Seasonal Packing Guide

The Year-Round Layering System

A three-layer system—base, mid, and shell—forms the backbone of any Interlaken wardrobe. For the base layer, choose merino wool or a synthetic quick-dry fabric that wicks moisture away from your skin. Avoid cotton, which stays damp and makes you cold once you stop moving; this is especially important at altitude where sweat can chill you quickly.

Your mid layer provides insulation. A packable down jacket is the single most useful item for the Jungfraujoch, where temperatures stay below freezing all year, even in July. For valley days, a fleece or wool sweater works well. Finally, a waterproof and windproof shell protects against afternoon showers and acts as a windbreak on exposed ridges.

Summer (June–September): Hiking and Thunderstorms

Summer in Interlaken brings comfortable valley temperatures, with sources indicating roughly 18°C to 26°C (64°F to 79°F) in town. The full network of trails and lifts typically opens from late June once snow clears, making this the prime hiking season – see the summer advice from Destination 195 for outfit inspiration. In town, casual summer clothing works, but you must be ready for quick weather changes.

Afternoons frequently bring thunderstorms that build over the Bernese Oberland, often with little warning. A sensible approach is to start ridge hikes early and descend by noon. For your daypack, carry a waterproof shell, a warm layer, and a hat and gloves even in summer—the high stations are cold.

For hiking, pack three merino tops, two pairs of hiking trousers, and one pair of shorts for warmer valley days. Merino socks, five pairs, handle sweat and cold and dry overnight. Sunglasses and high-factor sunscreen are essential: the altitude and reflective surfaces like snow and water intensify the sun's rays.

Spring (April–May): Melt, Mud, and Chilly Mornings

Spring in Interlaken is a time of transition, with melting snow feeding the lakes and rivers and many high trails still closed. In May, average temperatures range from a low of 8°C (46°F) to a high of 18°C (64°F), and rain is relatively common, averaging 13 rainy days in the month – as noted in the Destination 195 guide. Expect a mix of spring freshness and lingering winter chill, so layering is critical.

For spring, emphasize waterproof footwear and a sturdy rain jacket. Trails are likely to be muddy, so choose boots with good grip and consider gaiters for extra protection. A warm hat and gloves may still be needed on colder days, and a down jacket will be useful for higher excursions.

Autumn (October–November): Crisp Air and Golden Larches

Autumn brings clear, stable air and the golden colors of larch trees, often offering the year's best visibility. However, many mountain lifts and restaurants close from mid-October into November, so you may be limited to valley activities. Expect crisp mornings and chilly evenings, with temperatures gradually cooling.

Packing for autumn is similar to spring: layers, a warm mid layer, and a waterproof shell. A down jacket becomes more essential as the season progresses. For footwear, waterproof boots with good traction are wise, as rain and fallen leaves can make paths slippery.

Winter (December–March): Snow in Town and at Altitude

Winter in Interlaken is cold, with valley temperatures often between -2°C and 5°C, and snow is possible in town. The mountains, however, are a different story: Jungfraujoch runs year-round and remains below freezing, while ski resorts like Grindelwald and Wengen open their slopes. Expect grey, cold days in the valley while the peaks bask in sunshine. For a deeper dive into this season, see the January-focused packing guide.

For winter, plan a warm, all-purpose coat that handles temperatures down to -5°C (23°F), as recommended in the Alpenwild winter packing list. A winter packing list should include a warm hat, gloves, scarf, and sturdy waterproof boots with good traction for icy town streets. For skiing or high-altitude trips, add a fleece, base layers, and a waterproof ski shell.

Layering is crucial in winter because indoor spaces like trains, shops, and restaurants are often well-heated. Choose pants that are comfortable for long train rides and easy to wash, such as cotton-blend trousers rather than heavy jeans. For evenings, a casual outfit that is not too dressy works for hotel dinners and Christmas markets.

Footwear Strategy: Town Comfort vs. Alpine Grip

Your choice of footwear should match your planned activities. For walking around town and café hopping, a comfortable pair of sneakers or low-cut walking shoes is ideal. Look for close-toed options that provide support for long days on cobblestones and varied terrain.

For alpine hiking, waterproof boots with ankle support are the right tool for trails like the Eiger Trail, where loose rock and scree are common. Trail runners are not enough for such terrain. If you plan to hike regularly, invest in a pair of sturdy boots and break them in before your trip.

In winter, choose waterproof boots with good traction for icy streets. For evening wear, a pair of comfortable lightweight shoes can substitute for dressier footwear. Always prioritize comfort and grip over style; you will likely walk more than you expect.

Specialized Gear for Jungfraujoch, Paragliding, and More

For a visit to Jungfraujoch, the highest railway station in Europe at 3,454 meters, full winter layers are necessary regardless of the season. The observation terraces are exposed, and temperatures remain well below freezing. Dark sunglasses are also essential to protect against intense glare from the Aletsch Glacier.

For tandem paragliding, operators require long trousers and closed shoes. Since you will be stationary in moving air, a warm layer is important, and gloves are recommended in shoulder seasons. Operators supply harnesses and helmets, so you do not need your own gear.

For canyoning and white-water rafting, operators provide wetsuits, helmets, and neoprene boots. You should bring swimwear to wear underneath, a towel, and a complete change of clothes for afterward. For Grindelwald First and the Cliff Walk, layers are essential because temperatures are much lower than in Grindelwald below.

What Not to Bring

The most common mistake is packing only summer clothing. Even in July, the Jungfraujoch is freezing, and a t-shirt will leave you shivering within minutes. Another error is bringing cotton base layers, which become damp and dangerous at altitude once you sweat.

Trail runners are insufficient for challenging trails like the Eiger Trail, where loose rock and long descents demand sturdy boots. Similarly, avoid bringing your own paragliding or canyoning kit; operators require and supply their own equipment. A standard European power adapter is not enough—Switzerland uses Type J sockets.

A Compact 7-Day Packing Example

For an active week in summer, start with three merino wool tops, one packable down jacket, and one waterproof shell. Pair these with two pairs of hiking trousers, one pair of shorts, and a few casual shirts or blouses for town. Add five pairs of merino socks, hiking boots, and comfortable sneakers for the evening.

Include a warm hat, gloves, and a scarf that can stay in your daypack for high-altitude stops. Sunglasses, sunscreen, and a refillable water bottle are year-round essentials. For winter, swap the shorts for warm pants and add base-layer bottoms, a fleece, and a winter coat.

Before You Depart: Weather Check and Final Tips

Before you leave, check the weather forecast for both Interlaken and your mountain destinations. The town's forecast tells you little about conditions at Jungfraujoch, so look at mountain weather services or live webcams to plan your day. Start high-altitude hikes early to avoid afternoon storms.

Pack light enough to move easily between trains, but do not skimp on the essential layers. Remember that you can always buy a fleece at the top of Jungfraujoch, but it will cost you. Finally, break in new hiking boots before your trip to avoid blisters on the trail.

Plan Your Visit

Packing for Interlaken is about preparing for vertical variety, not just seasonal weather. With a solid layering system, waterproof outerwear, and sturdy footwear, you will be ready for everything from a boat cruise on Lake Brienz to a summit experience at Jungfraujoch.