The best time to visit Nantua is during the summer months, from June to September, when the weather is warm and ideal for outdoor activities.During this period, the average daily temperatures range from 20°C to 25°C, making it great for enjoying the lake and surrounding natural park. There's also less rainfall, ensuring more sunny days for exploring. Many local businesses, restaurants, and activity providers operate at their peak during these months, offering the widest range of options.Couples looking for a relaxing getaway will find this time particularly appealing. You can enjoy boat trips on Lac de Nantua, leisurely walks along the lakeside promenade, or explore the hiking trails in the Haut-Jura Regional Natural Park. The longer daylight hours also allow for more time to enjoy al fresco dining by the water.Families will also appreciate the summer months, as the lake offers swimming opportunities, and there are often organised activities and events in the town.