Halong Bay, VietnamQuick decision
When to visit Halong Bay?
🌞 Best time overall
November
🌡️ Optimal temperature
20°C–26°C in November
🌧 Least rain
25% rainy days in November
🌧 Wettest month
August (87%)
📅 Best score
8.2/10
By trip type
Best time by type of trip
Junk Boat CruiseOctober–April — overnight on the bay, karst caves and sunset.
Beaches & IslandsMay–September — Cat Ba, kayaking and less crowded beaches.
Rock ClimbingOctober–March — Cat Ba, limestone cliffs above the water.
PhotographyOctober–November — morning mists, golden light on the pinnacles.
Monthly climate data
Halong Bay weather month by month
| Month | Min °C | Max °C | Rainy days (%) | Precip. mm/d | Sun h/d | Score |
|---|---|---|---|---|---|---|
| 🌤️ January | 16°C | 20°C | 28% | 1.5 | 6.7h | 7.2/10 |
| 🌤️ February | 16°C | 21°C | 29% | 1.7 | 5.3h | 7.2/10 |
| 🌤️ March | 19°C | 24°C | 34% | 1.4 | 6.0h | 7.4/10 |
| 🌤️ April | 22°C | 26°C | 41% | 2.7 | 9.2h | 7.7/10 |
| ⛅ May | 25°C | 29°C | 63% | 5.8 | 10.8h | 7.3/10 |
| ⛅ June | 27°C | 31°C | 77% | 8.8 | 10.5h | 7.0/10 |
| ⛅ July | 27°C | 31°C | 80% | 10.4 | 11.0h | 7.0/10 |
| 🌧️ August | 26°C | 30°C | 87% | 14.3 | 9.2h | 6.3/10 |
| ⛅ September | 26°C | 30°C | 72% | 10.4 | 10.5h | 7.1/10 |
| 🌤️ October | 23°C | 28°C | 38% | 4.8 | 10.5h | 8.0/10 |
| 🌤️ November | 20°C | 26°C | 25% | 1.3 | 10.0h | 8.2/10 |
| 🌤️ December | 16°C | 22°C | 15% | 0.6 | 8.5h | 7.8/10 |
Ideal
Fair
Challenging climate
Source: Open-Meteo · 10 years
🌴 Tropical destination — heavy rain months benefit from an algorithmic adjustment: tropical showers are intense but brief and usually don't ruin a trip.
Seasonal breakdown
What to expect each season
🌸 Spring (Mar–May) — Good time
Average 26°C, 46% rainy days, 8.7h sunshine/day. Score: 7.5/10.
☀️ Summer (Jun–Aug) — Acceptable
Average 31°C, 81% rainy days, 10.2h sunshine/day. Score: 6.8/10.
🍂 Autumn (Sep–Nov) — Good time
Average 28°C, 45% rainy days, 10.3h sunshine/day. Score: 7.8/10.
❄️ Winter (Dec–Feb) — Good time
Average 21°C, 24% rainy days, 6.8h sunshine/day. Score: 7.4/10.
Accommodation
Find a place to stay in Halong Bay
Check availability during the recommended period
Tip : off-peak months (August, September) are cheapest but weather is significantly worse.
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Activities and tours in Halong Bay
Guided tours, skip-the-line tickets and local experiences.
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Flights
Find a flight to Halong Bay
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Monthly weather
Detailed weather by month
FAQ
Frequently asked questions
November is ideal with 25% rainy days and 26°C.
August is the wettest month with 87% rainy days.
Yes, November is the best month with an average of 26°C.
In winter, the average score is 7.4/10. Acceptable conditions for cultural visits.
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