The best time to visit Grandson is during the spring (April to June) and autumn (September to October) months for pleasant weather and fewer crowds.During spring, the countryside around Grandson bursts into bloom, offering beautiful scenery for walks and outdoor activities. The temperatures are mild, typically ranging from 10°C to 20°C, making it comfortable for exploring the castle and enjoying lakeside strolls without the peak summer heat. This period is ideal for couples looking for a romantic getaway with scenic views and a relaxed pace.Autumn brings stunning foliage, particularly in the vineyards surrounding Lake Neuchâtel. The weather remains agreeable, with temperatures generally between 8°C and 18°C, and the harvest season offers opportunities to experience local traditions and taste regional produce.