The best time to visit Cornwall, PEI, is during the summer months, from late June to early September, when the weather is ideal for outdoor activities and the town is most active.During this period, you'll find pleasant temperatures, typically ranging from 20°C to 25°C (68°F to 77°F), making it great for exploring the Confederation Trail, visiting local parks, or enjoying the scenic North River. The long daylight hours also allow for extended sightseeing and relaxation. This season is particularly suitable for families looking for a relaxed vacation with plenty of opportunities for outdoor fun.For couples seeking a quieter experience with beautiful scenery, early autumn, specifically September, also offers an appealing option. The summer crowds begin to thin, and the island's foliage starts to display vibrant colors, creating a picturesque backdrop.