Halong Bay, VietnamQuick decision
When to visit Halong Bay?
🌞 Best time overall
November
🌡️ Optimal temperature
68°F–79°F 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 °F | Max °F | Rainy days (%) | Precip. in/d | Sun h/d | Score |
|---|---|---|---|---|---|---|
| 🌤️ January | 61°F | 68°F | 28% | 0.1in | 6.7h | 7.2/10 |
| 🌤️ February | 61°F | 70°F | 29% | 0.1in | 5.3h | 7.2/10 |
| 🌤️ March | 66°F | 75°F | 34% | 0.1in | 6.0h | 7.4/10 |
| 🌤️ April | 72°F | 79°F | 41% | 0.1in | 9.2h | 7.7/10 |
| ⛅ May | 77°F | 84°F | 63% | 0.2in | 10.8h | 7.3/10 |
| ⛅ June | 81°F | 88°F | 77% | 0.3in | 10.5h | 7.0/10 |
| ⛅ July | 81°F | 88°F | 80% | 0.4in | 11.0h | 7.0/10 |
| 🌧️ August | 79°F | 86°F | 87% | 0.6in | 9.2h | 6.3/10 |
| ⛅ September | 79°F | 86°F | 72% | 0.4in | 10.5h | 7.1/10 |
| 🌤️ October | 73°F | 82°F | 38% | 0.2in | 10.5h | 8.0/10 |
| 🌤️ November | 68°F | 79°F | 25% | 0.1in | 10.0h | 8.2/10 |
| 🌤️ December | 61°F | 72°F | 15% | 0.0in | 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°F, 46% rainy days, 8.7h sunshine/day. Score: 7.5/10.
☀️ Summer (Jun–Aug) — Acceptable
Average 31°F, 81% rainy days, 10.2h sunshine/day. Score: 6.8/10.
🍂 Autumn (Sep–Nov) — Good time
Average 28°F, 45% rainy days, 10.3h sunshine/day. Score: 7.8/10.
❄️ Winter (Dec–Feb) — Good time
Average 21°F, 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.
Search on Hotels.comActivities & tours
Activities and tours in Halong Bay
Guided tours, skip-the-line tickets and local experiences.
Browse activities on GetYourGuide
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°F.
August is the wettest month with 87% rainy days.
Yes, November is the best month with an average of 26°F.
In winter, the average score is 7.4/10. Acceptable conditions for cultural visits.
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