Vietnam tropical-storm season runs approximately May–November, with serious weather and sea-transport disruptions possible. Cave excursions, national parks, protected reefs, mountain roads and border districts require seasonal and safety screening. Comprehensive flexible national itinerary across the Red River Delta, northwest mountains, Ha Giang, Ha Long Bay, central caves and imperial heritage, Hoi An, Central Highlands, Ho Chi Minh City, Mekong Delta and southern islands. Each regional chapter can be booked independently; weather, cave permissions, boat safety and long-distance transit are verified per enquiry.
