Thanh Pho Hoi An, Vietnam offers 1 beach perfect for sunbathing, surfing, swimming, and more. Thanh Pho Hoi An is known for its Ancient Town, a UNESCO World Heritage Site. The best time to travel to Thanh Pho Hoi An, Vietnam, is from February to April, with average air temperatures around 25-30°C (77-86°F) and water temperatures approximately 25-28°C (77-82°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!