Vietnam Ha Long Bay Weather in September (typhoon tail · improving late) — Climate Guide
September (typhoon tail · improving late) in Ha Long Bay is Improving
September (typhoon tail · improving late) is Improving for Ha Long Bay.
Typhoon tail — risk decreases late month. Early September still risky; late September into early October becomes shoulder-acceptable. Best for travelers with flexible dates wanting low prices + improving weather. Mid-Autumn Festival brings local family travel + brief lantern displays in Hanoi.
Travel score
Ha Long Bay September (typhoon tail · improving late) Weather Stats
Avg High
30°C
Avg Low
24°C
Rainy Days
14
240mm total
Sunshine
6h
Daily avg
Humidity
82%
Warm + humid
UV Index
8
Very high
Wind
9 km/h
Gusts 17
Sea Temp
28°C
Warm swimmable
Crowds
Quiet
At attractions
September (typhoon tail · improving late) Sunrise & Sunset
Air Quality
PM2.5
32 μg/m³
PM10
55 μg/m³
Status
Moderate
Feels-Like Temperature & Wind
Feels like
Daytime
34°C
Nighttime
25°C
Humidity and wind affect how the actual temperature feels.
Wind
9 km/h
Max gust 17 km/h
Activities Recommended for September (typhoon tail · improving late)
September (typhoon tail · improving late) Travel Pros & Cons
Pros
- Cruise prices still low
- Mid-Autumn lanterns in Hanoi
- Weather improving late month
Cons
- Early September still typhoon risk
- Humidity high
September (typhoon tail · improving late) Events & Festivals
- National Day September 2
- Mid-Autumn Festival (lunar)
Ha Long Bay in September (typhoon tail · improving late) — Full Picture
Typhoon tail — risk decreases late month. Early September still risky; late September into early October becomes shoulder-acceptable. Best for travelers with flexible dates wanting low prices + improving weather. Mid-Autumn Festival brings local family travel + brief lantern displays in Hanoi.
What to Wear & What to Pack
Light layers + rain jacket. Long pants for late-month cool evenings.
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 September (typhoon tail · improving late) Hotel Picks
Frequently Asked Questions
Is September (typhoon tail · improving late) a good time to visit Ha Long Bay?
Ha Long Bay in September (typhoon tail · improving late) is Improving. Tourist crowds are quiet and flight/hotel prices are low season.
What's the average temperature in Ha Long Bay in September (typhoon tail · improving late)?
Ha Long Bay September (typhoon tail · improving late) averages a high of 30°C and a low of 24°C.
Does it rain much in Ha Long Bay in September (typhoon tail · improving late)?
Ha Long Bay September (typhoon tail · improving late) averages 240mm of rainfall over about 14 rainy days.
What should I wear in Ha Long Bay in September (typhoon tail · improving late)?
Light layers + rain jacket. Long pants for late-month cool evenings.
What time are sunrise and sunset in Ha Long Bay in September (typhoon tail · improving late)?
Ha Long Bay September (typhoon tail · improving late) sunrise is 05:45 and sunset is 18:00, with 12h 15min of daylight.
What's the air quality like in Ha Long Bay in September (typhoon tail · improving late)?
Ha Long Bay September (typhoon tail · improving late) air quality (AQI) averages 70, rated Moderate. PM2.5 averages 32μg/m³.
What activities are recommended in Ha Long Bay in September (typhoon tail · improving late)?
In September (typhoon tail · improving late), Ha Long Bay is great for Cruise (late September safer), Hanoi Mid-Autumn lanterns, Cooking class.
Is September (typhoon tail · improving late) peak season in Ha Long Bay?
Ha Long Bay September (typhoon tail · improving late) crowds are quiet and prices are low season. You can travel relatively comfortably without long queues.
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.