Kailua-Kona, United States offers 2 beaches perfect for sunbathing, surfing, swimming, and more. Kailua-Kona is known for its historic Hulihee Palace, the annual Ironman World Championship, and the Kona Coffee Festival. The best time to travel to Kailua-Kona is from November to April, with average air temperatures around 75-85°F (24-29°C) and water temperatures around 75-80°F (24-27°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!