Vietnam Ha Long Bay Weather in October (peak autumn · second-best month) — Climate Guide
October (peak autumn · second-best month) in Ha Long Bay is Perfect
October (peak autumn · second-best month) is Perfect for Ha Long Bay.
Second-best month after April — 22/27°C, clear skies, low rainfall, perfect for cruise photography. Hotels return to peak rates. Book cruises 2-3 months ahead. The canonical October Ha Long Bay experience: misty mornings clearing into bright afternoons.
Travel score
Ha Long Bay October (peak autumn · second-best month) Weather Stats
Avg High
27°C
Avg Low
22°C
Rainy Days
8
100mm total
Sunshine
6h
Daily avg
Humidity
76%
Mild + pleasant
UV Index
7
High
Wind
8 km/h
Gusts 15
Sea Temp
26°C
Warm swimmable
Crowds
Very busy
At attractions
October (peak autumn · second-best month) Sunrise & Sunset
Air Quality
PM2.5
30 μg/m³
PM10
52 μg/m³
Status
Moderate
Feels-Like Temperature & Wind
Feels like
Daytime
28°C
Nighttime
22°C
Humidity and wind affect how the actual temperature feels.
Wind
8 km/h
Max gust 15 km/h
Activities Recommended for October (peak autumn · second-best month)
October (peak autumn · second-best month) Travel Pros & Cons
Pros
- Ideal 22/27°C
- Clear skies for photos
- Swimmable water
- Long autumn light
Cons
- Hotel + cruise prices peak
- International crowds peak
- Need to book 2-3 months ahead
October (peak autumn · second-best month) Events & Festivals
- Peak autumn international tourism
Ha Long Bay in October (peak autumn · second-best month) — Full Picture
Second-best month after April — 22/27°C, clear skies, low rainfall, perfect for cruise photography. Hotels return to peak rates. Book cruises 2-3 months ahead. The canonical October Ha Long Bay experience: misty mornings clearing into bright afternoons.
What to Wear & What to Pack
T-shirts + light layers. Long pants for evenings. Light rain shell occasional.
Packing Checklist
Seasonal Weather Overview
Spring (Mar·Apr·May)
26°C
19.7°C
12.3/mo
Summer (Jun·Jul·Aug)
31.7°C
26°C
16.7/mo
Autumn (Sep·Oct·Nov)
Current27°C
21.7°C
9.3/mo
Winter (Dec·Jan·Feb)
20°C
14°C
8/mo
Ha Long Bay Monthly Weather Comparison
| Month | High | Low | Rain | Sun | Humid | UV | Crowd | Price |
|---|---|---|---|---|---|---|---|---|
| 19° | 13° | 8d·25mm | 4h | 78% | 4 | Moderate | Shoulder | |
| 20° | 14° | 10d·30mm | 3h | 80% | 4 | Moderate | Shoulder | |
| 22° | 16° | 11d·35mm | 4h | 82% | 5 | Busy | Peak | |
| 26° | 20° | 12d·60mm | 5h | 84% | 7 | Very busy | Peak | |
| 30° | 23° | 14d·175mm | 6h | 84% | 9 | Moderate | Shoulder | |
| 32° | 26° | 15d·250mm | 6h | 84% | 10 | Quiet | Low season | |
| 32° | 26° | 17d·290mm | 6h | 84% | 10 | Quiet | Low season | |
| 31° | 26° | 18d·320mm | 5h | 85% | 9 | Quiet | Low season | |
| 30° | 24° | 14d·240mm | 6h | 82% | 8 | Quiet | Low season | |
| 27° | 22° | 8d·100mm | 6h | 76% | 7 | Very busy | Peak | |
| 24° | 19° | 6d·50mm | 6h | 75% | 5 | Busy | Peak | |
| 21° | 15° | 6d·25mm | 5h | 77% | 4 | Moderate | Peak |
View Other Months
Ha Long Bay October (peak autumn · second-best month) Hotel Picks
Frequently Asked Questions
Is October (peak autumn · second-best month) a good time to visit Ha Long Bay?
Ha Long Bay in October (peak autumn · second-best month) is Perfect. Tourist crowds are very busy and flight/hotel prices are peak.
What's the average temperature in Ha Long Bay in October (peak autumn · second-best month)?
Ha Long Bay October (peak autumn · second-best month) averages a high of 27°C and a low of 22°C.
Does it rain much in Ha Long Bay in October (peak autumn · second-best month)?
Ha Long Bay October (peak autumn · second-best month) averages 100mm of rainfall over about 8 rainy days.
What should I wear in Ha Long Bay in October (peak autumn · second-best month)?
T-shirts + light layers. Long pants for evenings. Light rain shell occasional.
What time are sunrise and sunset in Ha Long Bay in October (peak autumn · second-best month)?
Ha Long Bay October (peak autumn · second-best month) sunrise is 06:00 and sunset is 17:25, with 11h 25min of daylight.
What's the air quality like in Ha Long Bay in October (peak autumn · second-best month)?
Ha Long Bay October (peak autumn · second-best month) air quality (AQI) averages 68, rated Moderate. PM2.5 averages 30μg/m³.
What activities are recommended in Ha Long Bay in October (peak autumn · second-best month)?
In October (peak autumn · second-best month), Ha Long Bay is great for Cruise full circuit, Ti Top swim, Cat Ba hiking.
Is October (peak autumn · second-best month) peak season in Ha Long Bay?
Ha Long Bay October (peak autumn · second-best month) crowds are very busy and prices are peak. Advance reservations are strongly recommended.
Best Months to Visit Ha Long Bay
View Other Months
Why you can trust weather guide
Based in Chiang Mai for 8+ years, with 30+ countries visited across Southeast Asia, Japan, and Europe. Every detail in this guide is primary-source verified as of April 2026, with prices auto-refreshed via live exchange rate APIs. This isn't AI-generated boilerplate — it's written from the perspective of someone who has actually been there.