Okaloosa Island, United States offers 5 beaches perfect for sunbathing, surfing, swimming, and more. Okaloosa Island is known for its beautiful white-sand beaches and clear emerald waters. The best time to travel to Okaloosa Island is from April to June, with average air temperatures ranging from 70°F to 85°F and water temperatures around 70°F to 80°F. Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!