Driving in Switzerland in Winter: Tires, Pass Closures, Chains, and Rental Rules

Switzerland does not legally mandate winter tires for all vehicles — but rental car agreements almost universally require them, road conditions demand them, and driving without them on mountain roads in snow is dangerous. In practice, winter tires are not optional from November to March.

The big seasonal reality: most high mountain passes close between October and June. The national road network stays open year-round. If your itinerary relies on specific pass roads, plan for late June to early October — or structure your winter trip around valley roads and tunnel routes.

Swiss law does not specify winter tire requirements the way Germany and Austria do, but the practical standard is clear: from October to April, winter tires are considered the minimum for mountain travel. Most major rental companies fit winter tires from November 1 automatically.

Check your rental agreement before you assume. Look for phrases like 'seasonal tires fitted' or 'winter equipment included.' If the agreement does not specify, call and confirm — especially for rentals picked up in late October or early April.

All-season tires are acceptable in most rental agreements for Switzerland valley driving but may not satisfy mountain road conditions in heavy snow. If your itinerary includes any high-altitude driving in winter, request confirmed winter tires, not all-season.

If you have an accident in snowy conditions without proper tires, your rental insurance coverage can be voided — even if you held full CDW. The tire requirement is treated as a basic safety condition.

Most famous Swiss mountain passes close in late October and reopen in late May or June, depending on the year's snowfall. Closure and opening dates are not fixed — they depend on conditions.

The Furka Pass and Grimsel Pass typically close late October and reopen late May to early June. The Susten Pass follows a similar timeline. The Gotthard Pass (road, not tunnel) closes in November and reopens around mid-May.

The Bernina Pass is a notable exception: it is the highest road in Switzerland that remains officially open year-round, though it can be temporarily closed for snow clearing. It connects Pontresina to Tirano in Italy via 2,328m altitude.

For real-time pass status, the Swiss Federal Roads Office (ASTRA) maintains an up-to-date road closure map at viasuisse.ch. Always check before departing for a pass route.

Snow chains are legally required on Swiss roads displaying a chain-required sign — a red-bordered circle with a chain symbol. These signs appear at the approach to specific alpine roads and village access routes in winter conditions.

Rental car companies typically supply snow chains or include a chain waiver option. Confirm before pickup whether chains are in the boot and that they fit your vehicle's tires. An incorrectly sized chain is dangerous and useless.

If you have never fitted snow chains, practice before winter travel. Fitting chains on an icy mountain road at night in the dark is not the right time to learn. Practice in a dry carpark first. The process takes 10 to 15 minutes once familiar.

Do not drive faster than 50 km/h with chains fitted, and remove them as soon as the road surface clears — driving chains on dry asphalt damages both the chains and the road.

Standard collision damage waiver (CDW) covers most incidents but includes conditions that can invalidate it. Driving without appropriate winter tires, ignoring road closure signs, or driving onto chain-required roads without chains can all void your coverage.

If you use a credit card for CDW coverage instead of the rental company's insurance, check whether your card's winter/seasonal exclusions apply. Some premium cards explicitly exclude off-piste conditions or roads requiring special equipment.

Third-party liability is legally required in Switzerland for all road users. Rental cars always include this. However, damage to the rental vehicle itself is your responsibility unless you carry additional coverage.

For a comprehensive overview of insurance options and cross-border coverage before your trip, see the car rental in the Alps guide.

Before departing on any mountain drive in winter conditions, run through this basic check. It takes five minutes and prevents avoidable problems on isolated roads.