The month in detail
What to expect in October
Autumn in Halong Bay is often underrated: 82°F, golden light and declining crowds. An interesting window. Rain risk remains low (24% of days), leaving good room for outdoor activities.
October is the best month of the year in Halong Bay. Compared to September: −4°F daytime, 23 pts fewer rainy days, +1.2h of sun per day.
This month's conditions
What it's like in October
UV index
7 · high
sunscreen and hat advised
Feels like
muggy at times
20°
Sea
28°C
warm, ideal
Daylight
11.5h of daylight
Air quality
fair
AQI 49
Compare
Is October the right month?
October is actually the best month of the year in Halong Bay. Good timing.
Book
Plan your trip
Hotels at their lowest outside peak season, highest on comfortable months. Shoulder seasons offer a good price/climate compromise.
Stay
Hotels & rentals · Halong Bay
Expedia →
Activities
Tours, tickets, experiences
See ↓
Flights
Multi-airline comparator
Kiwi →
🎟️ Activities & tours · Halong Bay
GetYourGuide selection · free cancellation
Practical info
What you need to know before you go
Three angles: the country (language, currency, safety, budget), the year-round climate, and the specifics of a tropical stay.
Country · Vietnam
🗣️LanguageVietnamese
💶CurrencyVietnamese Dong (₫)
🚗DrivingRight-hand
🛡️Safety ⓘSafe · 2/5
💰Cost of living ⓘVery cheap · 1/5
🌡️ Climate
🌍Climate typeTropical
📈Climate trend ⓘStable
🔥Hottest monthJune · 88°F
❄️Coolest monthJanuary · 68°F
🌧️Rainiest month ⓘAugust · 62%
🏝️ Tropical stay
🌞Dry season ⓘMay → Sep
🌧️Wet season ⓘDec → Mar
🌀Cyclones ⓘSeason Nov-Apr
Explore
Other destinations in October
If October doesn't convince you for this destination, compare with others.
Location
Where is Halong Bay ?
Global position + regional geographic context.
🌍 World
🔍 Geographic context
VietnamTropical climate with a 8.6 → 4.6 gap between best and worst month. 10 years of ERA5 data to choose by project.
20.91°N · 107.18°E
Questions
Frequently asked questions
What is the best time to visit Halong Bay?
November is the best month with 79°F highs, 68°F lows, 7.0h of sunshine and 14.0% rainy days. The months of November & October offer comparable conditions.
How many hours of sunshine does Halong Bay get in November?
Halong Bay averages 7.0 sunshine hours per day in November. It is the sunniest month with a climate score of 8.1/10.
What is the rainiest month in Halong Bay?
August is the most unfavourable month with August has the lowest climate score of the year and the lowest climate score of the year.
What are the temperatures at night in Halong Bay in November?
In November, overnight lows reach 68°F, while afternoon highs average 79°F.
Is Halong Bay good in winter?
In winter (December-February), Halong Bay scores 7.4/10 on average — Acceptable conditions for cultural visits.. The best month overall remains November with a score of 8.1/10.
When should you avoid Halong Bay?
August is the most difficult month to visit Halong Bay, with August has the lowest climate score of the year. Climate conditions are at their lowest of the year during this period.
Can you swim in Halong Bay in October?
In October, the sea averages 83°F in Halong Bay: warm, ideal. Ideal conditions for swimming and snorkeling.
Do you need sun protection in Halong Bay in October?
The average UV index reaches 7 in October in Halong Bay (high), with about 11.5h of daylight. Sunscreen and hat advised.