Cayucos, United States offers 3 beaches perfect for sunbathing, surfing, swimming, and more. Cayucos is known for the Cayucos Pier and its historic downtown area. The best time to travel to Cayucos, United States, is from September to November, with average air temperatures around 70°F (21°C) and water temperatures near 60°F (16°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!