Kellys Beach, Canada offers 1 beach perfect for sunbathing, surfing, swimming, and more. Kellys Beach, New Brunswick, Canada, is known for Kouchibouguac National Park. The best time to visit Kellys Beach, Canada, is during the summer months of June to August, when the average air temperature is around 20-25°C (68-77°F) and the water temperature is approximately 18-20°C (64-68°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!