Vietnam Ha Long Bay Weather in September (typhoon tail · improving late) — Climate Guide
September (typhoon tail · improving late) in Ha Long Bay is Improving
Ha Long Bay Weather in September (typhoon tail · improving late) — Quick Answer
As of 2026- Avg temp
- 30° / 24°
- Rainfall
- 240mm · 14 days
- Crowds
- Quiet
As of 2026, Ha Long Bay in September (typhoon tail · improving late) averages a high of 30°C and low of 24°C with 240mm of rain over about 14 days. Light layers + rain jacket. Long pants for late-month cool evenings.
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 |
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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
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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.