Santa Rosalia, Mexico offers 3 beaches perfect for sunbathing, surfing, swimming, and more. Santa Rosalia, Campeche, Mexico, is known for its historic architecture and the nearby Calakmul Biosphere Reserve. The best time to travel to Santa Rosalia, Mexico, is from November to April, with average air temperatures around 70-80°F (21-27°C) and water temperatures around 70-75°F (21-24°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!