The weather in Vorarlberg is determined by the high mountain chains and Lake Constance, whose function as a heat reservoir is responsible for the mild climate. Its location, surrounded by high mountain crests, means that it can be dangerous for water sportspeople since surprisingly high waves are not infrequent.
The mountains provide warm fall winds which are felt by many. One peculiarity has been repeating itself for centuries: about every 70 years, Lake Constance freezes over so that it is possible to walk cross it. The last “Seegfrörne”, as it is known, was in the winter of 1962-63.