The best time to visit Sault Ste Marie is during the summer months, from June to August, when the weather is warm and most attractions are fully operational.Summer offers comfortable temperatures, typically ranging from 20°C to 25°C, making it ideal for outdoor activities and exploring the city without the chill of the shoulder seasons or the snow of winter. This is when the famous Soo Locks boat tours run frequently, and the waterfront areas are bustling with activity.For those interested in the natural beauty of the Upper Peninsula, late September to early October is an excellent time to visit for autumn foliage. The surrounding forests, particularly along the scenic drives like M-129 or I-75 heading north, display a stunning array of red, orange, and gold leaves. While the weather can be cooler, with average temperatures around 10-15°C, the vibrant colours create a truly memorable experience.Travellers looking to avoid crowds and potentially find better value on accommodation might consider the shoulder months of May or early September. The weather is still pleasant, though cooler than mid-summer, and many attractions are open, but with fewer visitors.