San Antonio del Mar, Mexico offers 2 beaches perfect for sunbathing, surfing, swimming, and more. San Antonio del Mar, Baja California, Mexico, is known for its picturesque coastal views and tranquil beach atmosphere. The best time to visit San Antonio del Mar, Mexico, is from April to June, with average air temperatures around 70-80°F (21-27°C) and water temperatures around 65-70°F (18-21°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!