June in Hạ Long averages a daily high of 32.4°C with nights around 26.5°C. Expect roughly 11.1 wet days totalling 198.8mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Hạ Long is November–January.
Based on PHU LIEN, VM (48.7km), 1995–2024. 21 years of June data.