The best time to go to Sacre Coeur is during the summer months, from June to August, for warm weather and full access to outdoor activities.During this period, the weather is generally pleasant, with average temperatures around 20-25°C. This is ideal for enjoying the region's natural beauty, including hiking trails, kayaking, and boat tours on the Saguenay Fjord. All visitor centres and attractions are fully operational, offering the most comprehensive experience.For those interested in whale watching, late June to early September offers the best chances to spot various species in the Saguenay–St. Lawrence Marine Park. This is when the whales are most active in the area, feeding in the rich waters. Many boat excursions depart from nearby Tadoussac during these months.If you prefer to avoid the busiest tourist season but still want good weather, the shoulder months of May and September can also be excellent.