The best time to visit Dexter is during the warmer months, specifically from late May to early September, when the weather is most pleasant for outdoor activities.During this period, you'll find the temperatures are comfortable, typically ranging from 20°C to 27°C, making it ideal for enjoying the natural beauty of the region. This is when the Thousand Islands region, including Dexter, truly comes alive with opportunities for boating, fishing, and exploring the St. Lawrence River.Couples looking for a relaxing getaway will appreciate the long daylight hours, great for scenic drives along the river, visiting local wineries, or enjoying a quiet evening by the water. Many of the boat tours to see the Thousand Islands operate frequently during these months, offering a convenient way to experience the area's main attraction.Families will find the summer months particularly good for activities like kayaking, swimming in the river, or picnicking in the local parks.