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

Switzerland has no calendar winter-tire mandate. The practical duty is still strict: the driver must keep control of a vehicle suited to the conditions, and unsuitable tires can cause obstruction, liability and insurance consequences after a crash. Rental requirements and winter-equipment fees vary by supplier, so confirm the exact tire specification in writing.

The big seasonal reality: most high mountain passes close between October and June. Main motorways, valley roads and tunnels are maintained as winter links, but temporary closures remain possible. 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 set a winter-tire calendar like neighbouring countries, but suitable winter tires are the prudent minimum for snow and mountain travel. Supplier policies differ: some rates include a seasonal package, while others charge separately or require a request.

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.

Do not assume an all-season label satisfies the rental contract or the conditions. If your itinerary includes winter mountain driving, request a confirmed tire specification with the 3PMSF snowflake and inspect the fitted tires at pickup.

If unsuitable tires contribute to an accident or obstruction, liability can increase and the rental company or insurer may reduce cover or seek recovery under the contract. The exact consequence depends on causation and the policy wording, so read the exclusions rather than assuming full CDW overrides them.

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 normally reopens in late May or June, depending on snow clearance; the Gotthard road tunnel is the winter route.

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, check the TCS traffic and pass-status map at tcs.ch, which carries Viasuisse/ASTRA traffic data. Always check before departing for a pass route.

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

Chains are normally a requestable paid extra rather than guaranteed boot equipment. Confirm the reservation before pickup, then check that the set is present, approved for the vehicle and sized for its fitted 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.

Collision damage waiver (CDW) is subject to exclusions. Ignoring closure or chain signs, breaching the rental terms, or using equipment unsuitable for the conditions can reduce cover or allow the supplier or insurer to seek recovery; the result depends on the contract and whether the breach contributed to the loss.

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.