The best time to visit Naantali is during the summer months, from June to August, when the weather is warm and the town is most active.During these months, the average daily temperatures range from 18°C to 22°C (64°F to 72°F), making it pleasant for outdoor activities and exploring. This period also coincides with the Midnight Sun, offering long daylight hours that extend well into the evening, maximizing your sightseeing opportunities. Many local attractions, including the Moominworld theme park and the Naantali Spa, operate on extended schedules, and there are numerous outdoor events and festivals.Families, especially those with young children, will find July particularly appealing due to the full operation of Moominworld and a wide array of family-friendly activities. The warm weather allows for comfortable exploration of the Old Town and its waterfront.Couples looking for a relaxing getaway will appreciate the extended daylight and the opportunity for evening strolls along the harbor.