Timing and season: May, September and the winter hardly anyone knows
The high season runs from mid-June to mid-September, peaking in July and August, when even the off-peak tricks in Hallstatt only half work. May and the first half of June are the best time: cable cars open, meadows green, snow on the Dachstein, lakes still cold, but the villages are yours from 3 pm. September and early October are the second good time, with warm lakes, clear air and the Almabtrieb, when the cattle come down from the pastures. The Salzkammergut is wet: the northern weather front brings more rain than elsewhere in Austria, often as afternoon thunderstorms, so plan mountain days for the morning. At the end of October most cable cars and many hotels in Hallstatt close until Christmas. Advent in Hallstatt and above all in Bad Ischl, St. Wolfgang and St. Gilgen (Wolfgangsee Advent with a boat between the markets) is atmospheric and far emptier than Salzburg. January to March is the quietest time: Hallstatt in the snow with perhaps 200 visitors a day, the Salzwelten open, the Krippenstein as a freeride mountain with a ski pass of CHF 50 (about EUR 54), cross-country skiing in Gosau, ice skating on Lake Hallstatt in very cold winters. If you really want to see the village quiet, come in February during the week. Then, however, half the restaurants are closed and the ferry runs less often, so check the timetable beforehand.