The best time to visit Rocky Harbour is during the summer months, from June to September, when the weather is reliably pleasant and all attractions are fully operational.During this period, the temperatures are mild, typically ranging from 15°C to 25°C, making it ideal for exploring Gros Morne National Park. The hiking trails are open and well-maintained, and boat tours of the fjords, such as Western Brook Pond, run frequently. Wildlife spotting, including moose and caribou, is also more common.For travellers who enjoy outdoor activities like hiking and boat tours, July and August offer the warmest weather and the longest daylight hours. This allows for extended exploration of the park's natural beauty without the worry of cooler temperatures or reduced operating hours for attractions.If you prefer to avoid the peak season crowds while still enjoying good weather, early June or September are excellent choices.