August · Vietnam
Best time to visit Ha Long Bay in August Weather, crowds & prices
Weather in Ha Long Bay in August
Average temperature 28°C, 415 mm of rain, about 17 days with 6+ hours of sunshine and 87% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
August score
3.1/10
Ranked #11 of 12 months
- Avg temp
- 28°C
- Rainfall
- 415 mm
- Humidity
- 87%
- Days with 6h+ sun
- 17
- Crowd Density
- Quiet / Uncrowded
- Average Expenses
- $ · Budget Friendly ($)
August in Ha Long Bay scores 3.1/10 for nature and wildlife travel - ranked #11 of 12. Expect around 28°C, 415 mm of rain, and roughly 17 days with 6+ hours of sunshine this month.
Ha Long Bay's limestone towers rise from green water, with overnight junks, cave visits, and kayaking among the islands.
August in Ha Long Bay — off-season conditions
Days in August average 28°C (83°F) and humidity near 87% — front-load outdoor plans before the heat builds and treat the middle of the day as indoor time.
Expect monsoon-level rainfall at 415 mm: only about 17 days with 6+ hours of sunshine across the month, and stretches of heavy rain are normal.
That is 3.1/10 on the same scale — 11th of 12 months, versus 8/10 for the best month here.
Pack the lightest breathable clothing you own, a hat, and more water than feels necessary, a proper rain shell rather than an umbrella, footwear you can get muddy.
Budget for low-season pricing, and crowds are light for this destination.
If your dates are flexible, November is materially better in Ha Long Bay — 4.9 points higher on the same scale.
Frequently asked
- What is the weather like in Ha Long Bay in August?
- In August, Ha Long Bay averages 28°C, 415 mm of rain, and about 17 days with 6+ hours of sunshine. Its climate-comfort score is 3.1/10.
- Is August a good time to visit Ha Long Bay?
- August earns a 3.1/10 climate-comfort score. Use the year-round chart to weigh the weather against your budget and crowd preferences.
- How much does it rain in Ha Long Bay in August?
- Expect about 415 mm of rain in August. Average humidity is 87% and there are about 17 days with 6+ hours of sunshine.
Curated in Ha Long Bay
Tickets & experiences
Things to do in Ha Long Bay
Ha Long Bay, Vietnam. Live activities and tours from GetYourGuide, matched to this destination.