Rio Del Mar, United States offers 3 beaches perfect for sunbathing, surfing, swimming, and more. Rio Del Mar, California, United States, is known for Seacliff State Beach and the SS Palo Alto concrete ship. The best time to travel to Rio Del Mar, United States, is from June to September, with average air temperatures around 70-75°F and water temperatures around 60-65°F. Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!
