Playa La Costilla, Mexico offers 1 beach perfect for sunbathing, surfing, swimming, and more. Playa La Costilla, Baja California, Mexico, is known for its stunning beaches and vibrant marine life. The best time to travel to Playa La Costilla, Mexico, is between November and 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!