Errislannon, Canada offers 1 beach perfect for sunbathing, surfing, swimming, and more. Errislannon, Newfoundland and Labrador, Canada, is known for Gros Morne National Park. The best time to travel to Errislannon, Canada, is during the summer months of June to August, when the average air temperature is around 20°C (68°F) and the water temperature is approximately 15°C (59°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!