The best time to visit southern Vietnam is during the dry season, from December to April, when the weather is warm, sunny, and less humid. In Ho Chi Minh City, travelers can enjoy vibrant streets, colonial architecture, bustling markets, and exciting nightlife without heavy rains disrupting the experience. The Mekong Delta is at its most beautiful during this season, with calm waterways, floating markets, and lush orchards perfect for boat trips and cycling tours. For those seeking sun and sea, Phu Quoc Island offers golden beaches, crystal-clear waters, and opportunities for snorkeling, diving, and luxury resort stays. While the wet season from May to November brings short but heavy showers, travel is still possible, especially with fewer tourists and lower prices. Overall, the dry months are considered the most comfortable and rewarding time to discover the charm and diversity of southern Vietnam.