Waikui, United States offers 4 beaches perfect for sunbathing, surfing, swimming, and more. Waikui is known for its stunning Waikui Beach and the historic Waikui Lighthouse. The best time to travel to Waikui, United States, is from May to September, with average air temperatures around 75°F (24°C) and water temperatures near 70°F (21°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!