Casa Blanca, Mexico offers 1 beach perfect for sunbathing, surfing, swimming, and more. Casa Blanca, Sinaloa, Mexico, is known for its proximity to the vibrant city of Mazatlan and the scenic Sierra Madre Occidental. The best time to travel to Casa Blanca, Mexico, is from November to April, with average air temperatures around 75°F (24°C) and water temperatures near 80°F (27°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!