Halong Bay · SpringMonth summary
Halong Bay weather in May
✅ Good
🌡️ Temperature min / max
25°C – 29°C
🌧 Rainy days
63% of days
☀️ Sunshine
10.8h per day on average
🌊 🌊 Season
Spring
⭐ ⭐ Weather score
7.3/10
📅 📅 Best month
November (8.2/10)
Quick decision
Should you visit Halong Bay in May?
✅ Good
✅ Yes if: you're willing to accept showers in exchange for lower prices and fewer tourists.
❌ No if: you're planning 100% outdoor activities — rain is frequent.
Our take: May is a good time to visit Halong Bay. November remains slightly better (+0.9 pts).
By trip type
Halong Bay in May by trip type
- 🏙️ 🏙️ City break / culture : ✅ Good
- 🚶 🚶 Outdoor activities : ⚠️ Possible
- 🏖️ Beach / swimming : ⚠️ Possible
- 💰 💰 Budget : 🌿 Shoulder
Local context
What to expect in May
🎯 Water at 26°C and lively beaches — May is peak swimming season in Halong Bay Spring marks the start of the good season in Halong Bay. Temperatures rise (29°C) and tourists have not yet arrived en masse. With 63% of rainy days, always have indoor alternatives planned. Not the best window, but acceptable if dates are constrained. November (8.2/10) is significantly better if possible.
Browse by month
All months for Halong Bay
Annual table
Month-by-month comparison
| Month | Min °C | Max °C | Rain % | Precip mm | 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
◀ Current month · Source Open-Meteo · 10 years
📊 Data source
Data based on 10 years of ERA5 records via Open-Meteo, with ECMWF seasonal adjustment. In May, Halong Bay averages 29°C, 63% rainy days and 10.8h of sunshine per day. Overall weather score: 7.3/10.
See methodology →
Comparison
May vs November (best month)
The best month is November (score 8.2/10). Difference:
- 🌡️ Max temperature : -3°C
- 🌧 Rainy days : -38%
- ☀️ Sunshine : -0.8h/day
FAQ
FAQ — Halong Bay in May
Is May a good time to visit Halong Bay?
May is an acceptable time for Halong Bay (score 7.3/10). Conditions are decent but not optimal — consider November (8.2/10) if possible.
Does it rain a lot in Halong Bay in May?
Yes, 63% of days see rain in May. Plan some indoor activities as backup.
Accommodation
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Activities & tours
Activities and tours in Halong Bay
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