That holds as long as the tour includes or guarantees your castle ticket and gets you there early enough to use the daylight. A tour solves the two problems that cause most winter trips to go wrong: sold-out timed tickets and an unreliable train route this season. No tour can fix the weather, though. Mary's Bridge often closes in ice and snow, and so does the shuttle bus. If you go, go for the castle and the snow, and treat the famous bridge view as a bonus.
The reassuring part comes straight from the official Ticket Centre: when Mary's Bridge is closed, access to the castle and its guided tours is not affected, and Neuschwanstein can be visited in all weathers. The castle is the dependable part of your winter day, and everything around it is variable.
This page weighs that variability, so you can decide whether a winter trip is right for you and whether a tour is the way to do it. For hours, tickets and the walk up, see our complete winter guide; for the year-round case, our Neuschwanstein worth-it verdict.
This winter only: the main road through Schwangau is closed for renovation until about mid-December 2026, with the castles reached on a detour through Hohenschwangau. It adds time to the drive and the bus from Füssen, and it is one more thing a tour's driver deals with for you.