The best time to go to Chiemsee depends on your preferences for activities and weather, but generally, late spring (May-June) and early autumn (September-October) offer the most pleasant experiences.For those who enjoy outdoor activities like hiking, cycling, and watersports, the summer months from July to August are ideal. The weather is warm, superb for swimming in the lake, and boat trips are plentiful. This is also when all attractions, like Herrenchiemsee Palace and Fraueninsel, have extended opening hours. However, it's also the busiest time, so expect more people and higher prices for accommodation.If you prefer fewer crowds and comfortable temperatures for exploring, May, June, September, and early October are excellent. The landscape is beautiful, either with spring blossoms or autumn colours, and the weather is typically mild enough for outdoor pursuits without being too hot. You'll still find most attractions open, and it's a good time for a more relaxed trip.Winter, from November to April, can be beautiful with snow-covered landscapes, and it's a peaceful time to visit if you enjoy quiet walks and cosy evenings.