Vietnam
Ha Long Bay in September
🌧️ Rainy seasonWarm, humid and very wet. Watch for tropical cyclone & flood risk.
🎒 Pack: light, breathable clothes & sunscreen · compact umbrella or rain jacket · quick-dry fabrics · waterproof sandals
Why September scores 6.6What goes into the score
How it works- Weather comfort5.5
- ✓Warm (30.2°C highs / 25.4°C lows)
- !Very humid/sticky (dew point 24.8°C)
- !Wet: ~324 mm rain, ~10 heavy-rain days
- Air quality8.5
- ✓Good (within WHO guideline) (PM2.5 ~14 µg/m³)
- Seasonal hazards7.0
- !Tropical cyclone: Peak of the Western Pacific typhoon season
- !Flood: ~10 heavy-rain days (≥10 mm) in an average September
- Safety baseline7.5
- ·Increased caution
| Sep | Nov | |
|---|---|---|
| Score | 6.6 Good | 9.0 Excellent |
| Season | 🌧️ Rainy season | ☀️ Dry season |
| High / low | 30° / 25° | 25° / 19° |
| Rain | 324 mm | 44 mm |
| Humidity | dew pt 25° | dew pt 18° |
| PM2.5 | 14 µg/m³ | 18 µg/m³ |
Typical-month data: NASA POWER (MERRA-2 reanalysis) 2015–2024 (modelled, not a forecast).
Holidays & crowdsSeptember 2027
Long weekendThere's at least one long weekend. Domestic travel picks up and popular spots get busier over those days.
- National Day 2–5 Sep · 4 days off in a row
National holidays only; regional holidays and school breaks aren't included. Source: holidays (open-source public-holiday calendar).
Explore Ha Long BayEvents, sights, food & souvenirs
Check event dates locallyA UNESCO-listed bay in northern Vietnam with thousands of limestone islands, best explored on an overnight boat cruise.
National DayEvery year2 September every year
A national holiday marking Vietnam's declaration of independence.
Why go: Domestic travel is busy around the long weekend.
Where: Across Vietnam
Coming up later
Tết (Lunar New Year)Date variesLunar calendar — late Jan to mid-Feb, date moves each year
Vietnam's biggest holiday, when families gather and streets are decorated with flowers and red banners.
Why go: Many shops and restaurants close for several days and domestic travel is very busy, so book transport early.
Where: Ha Long and across Vietnam
Ha Long Bay cruises
Day and overnight cruises through the limestone islands.
💡 Typhoons and storms can cancel cruises roughly June to October.
Sung Sot Cave
One of the largest caves in the bay, with large chambers.
Ti Top Island
An island with a small beach and a viewpoint over the bay.
Kayaking
Kayaking through lagoons and caves such as Luon Cave.
Bai Tu Long Bay
A quieter neighbouring bay with similar limestone scenery.
Cat Ba Island
The largest island in the area, with a national park, reached from Ha Long or Haiphong.
Chả mực
Fried squid cakes, Ha Long's best-known specialty.
💡 Local restaurants and markets
Seafood
Fresh fish, clams, crabs and shrimp from the bay.
💡 Seafood restaurants in Ha Long city
Bánh cuốn chả mực
Steamed rice rolls served with squid cakes.
💡 Breakfast shops
Pearls
Pearls from farms in the bay area.
💡 Pearl shops
Chả mực
Vacuum-packed squid cakes.
💡 Local markets
Airport transfer Kiwitaxi
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