Dennis Beach, Canada offers 1 beach perfect for sunbathing, surfing, swimming, and more. Dennis Beach, New Brunswick, Canada, is known for its scenic coastal views and tranquil beach atmosphere. The best time to visit Dennis 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 15-20°C (59-68°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!