The best time to visit Eich, Canton of Lucerne, Switzerland, is typically during the warmer months, from late spring to early autumn (May to September).
During this period, the weather is generally pleasant, with comfortable temperatures ideal for outdoor activities and enjoying the natural beauty of Lake Sempach and the surrounding countryside. You'll find opportunities for swimming, boating, hiking, and cycling. The days are also longer, allowing for more time to explore.
For those interested in watersports and swimming in Lake Sempach, July and August offer the warmest water temperatures. This is also when local events and festivals are more likely to take place, adding to the holiday experience.
Travellers looking for a quieter experience, with fewer crowds and slightly cooler, yet still enjoyable, weather, might consider late May/early June or September.