Tan Quy, Vietnam offers 1 beach perfect for sunbathing, surfing, swimming, and more. Tan Quy, Phu Yen, Vietnam, is known for its proximity to the scenic Ganh Da Dia, a unique geological formation of hexagonal basalt columns. The best time to travel to Tan Quy, Vietnam, is from December to April, with average air temperatures around 25-30°C (77-86°F) and water temperatures approximately 27-29°C (81-84°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!