The best time to go to Cap-aux-Meules is during the summer months, from June to September, when the weather is at its warmest and most agreeable.
During July and August, you'll experience the peak of summer, with average temperatures around 20-22°C (68-72°F). This is superb for enjoying the beaches, cycling along the scenic routes, and participating in outdoor activities like kayaking or paddleboarding. The ferries operate on a more frequent schedule, and most of the local businesses, restaurants, and attractions are fully open.
For those who prefer slightly fewer crowds but still want pleasant weather, June and September are excellent choices. In June, the island is just beginning to come alive, with blooming wildflowers and longer daylight hours. September offers crisp air, beautiful autumn colours starting to appear on the landscape, and the chance to experience local harvest festivals. The sea temperatures are still comfortable enough for swimming in early September.
Travellers looking for a quiet experience might consider late May or early October. While some services might have reduced hours, you'll find the island peaceful and still beautiful, though the weather will be cooler and windier.