Keng Hi, Laos offers 4 beaches perfect for sunbathing, surfing, swimming, and more. Keng Hi, Phongsaly, Laos, is known for its proximity to the Phou Den Din National Protected Area. The best time to travel to Keng Hi, Laos, is from November to February, with average air temperatures around 20-25°C (68-77°F) and water temperatures approximately 22-26°C (72-79°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!