Half Moon Bay, United States offers 19 beaches perfect for sunbathing, surfing, swimming, and more. Half Moon Bay is known for the annual Half Moon Bay Art & Pumpkin Festival and the famous Mavericks surf break. The best time to visit Half Moon Bay is from September to November, with average air temperatures around 60-70°F and water temperatures around 55-60°F. Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!