August in Hạ Long averages a daily high of 31.7°C. Expect roughly 16.7 wet days totalling 364.1mm. Demanding conditions — pack for it and plan indoor options.
Across the year, the best time to visit Hạ Long is November–January.
Based on PHU LIEN, VM (48.7km), 1995–2024. 19 years of August data.