Cow Bay, Canada offers 6 beaches perfect for sunbathing, surfing, swimming, and more. Cow Bay, Nova Scotia, Canada, is known for Rainbow Haven Beach and the Cow Bay Moose. The best time to travel to Cow Bay, Canada, is in July 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!