Plan Your Trip Weather April in Halong Bay: Weather and Event Guide August in Halong Bay: Weather and Event Guide December in Halong Bay: Weather and Event Guide February in Halong Bay: Weather and Event Guide Halong Bay Weather January in Halong Bay: Weather and Event Guide July in Halong Bay: Weather and Event Guide June in Halong Bay: Weather and Event Guide March in Halong Bay: Weather and Event Guide May in Halong Bay: Weather and Event Guide November in Halong Bay: Weather and Event Guide October in Halong Bay: Weather and Event Guide September in Halong Bay: Weather and Event Guide The Best Time to Visit Halong Bay