Ewa Beach, United States offers 6 beaches perfect for sunbathing, surfing, swimming, and more. Ewa Beach is known for its proximity to Pearl Harbor and the Ewa Beach Golf Club. The best time to travel to Ewa Beach, United States, is from April to October, with average air temperatures around 75-85°F and water temperatures ranging from 76-81°F. Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!