Halong Bay, Vietnam

Set in an ocean-tempered climate, Halong Bay (Vietnam) is best understood through its weather data: our 2015–2024 climate record puts its peak at an 88/100 sun score in November, exactly the kind of reliability you want for a nature-first trip.

Across a typical year, afternoon temperatures swing between 20°C (January) and 31°C (June). The wet–dry contrast is pronounced: 88% rain-day odds in August against 15% in December. If 24°C is your bar for proper warmth, count on April–November.

Season by season (on the northern calendar), spring brings 26°C highs with 45% rain-day odds, summer 31°C at 82%, autumn 28°C at 43%, and winter 21°C at 23%. In short: plan around spring if you can, keep autumn as the fallback, and go into summer with managed expectations (its season score is 72). If your dates are flexible, April buys you 27°C warmth at the quiet end of the season.

Best months to visit Halong Bay

Ranked purely on sunshine odds, the podium is November at 88/100, then December at 83 and April at 82. The dependable window is wider than the podium, though: January–July and September–December all score 70 or better. The month to avoid on pure weather odds is August (69/100).

Among the ocean destinations in our catalog, its November rain odds beat 71% of the field.

Month-by-month breakdown for Halong Bay → · More destinations for November →

As of the latest refresh, Halong Bay's next 16 days span 18°C to 30°C; 5 days look mostly sunny while 7 look likely to be wet — a live sun score of 80/100.