The best time to go to Au, Vorarlberg, Austria, largely depends on whether you're seeking winter sports or summer outdoor activities.For winter sports enthusiasts, the prime time to visit is from December to March. During these months, Au and the surrounding Bregenz Forest region are blanketed in snow, offering excellent conditions for skiing, snowboarding, and cross-country skiing. The slopes are typically well-maintained, and many hotels provide convenient access to ski lifts for an easy experience.If you prefer hiking, cycling, and enjoying the Alpine scenery without snow, the best time to visit is from June to September. The weather is generally mild and pleasant, great for exploring the numerous walking trails and enjoying the lush green landscapes.