November 18 is generally a great time to visit Halong Bay. While there is a slight chance of rain (15%), showers are usually brief. Expect comfortable 25°C weather. It's a lively time to explore Halong Bay, with most attractions operating at full capacity.
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Essential Travel Info for Halong Bay
Currency
VND
₫ Vietnamese đồng
Language
Vietnamese
Driving
Right side
Safety
High Safety
GPI: 1.786
Halong Bay Weather Forecast for November 18
"Mild & Comfortable. Expect average highs of 24.7°C. 15% chance of rain."
What to Wear in Halong Bay in November
Based on historical data for November 18, Halong Bay typically experiences temperatures between 19.5°C and 24.7°C. We recommend packing t-shirt, light clothing to stay comfortable. Trends suggest it will stay mostly dry (15% rain probability), but checking the forecast before heading out is always wise.
Complete Packing Guide
Weekly breakdown & essential items for Halong Bay
Smart Suitcase
- T-Shirt
- Light Clothing
Average High
24.7°C
Daytime Peak
Average Low
19.5°C
Nighttime Low
Feels Like
25.5°C
☀️ Feels accurate
Rain Chance
15%
Avg 0.7mm if it rains
Cloud Cover
56%
Overcast
Pressure
1016.8 hPa
Medium volatility
Halong Bay Weather Conditions & UV Index
Weather Confidence
30-year variance analysis
Based on 10 years of data
✓ Weather is generally predictable, but pack for minor variations. A light backup layer is recommended.
Sun Exposure
UV Index & Safety Guide
Protection Needed
SPF 15 for extended outdoor time
Type I-II
🔴 160 min to burn
Type III-IV
🟡 240 min to burn
Type V-VI
🟢 400 min to burn
UV estimate based on latitude, season & cloud cover. Actual UV may vary.
Outdoor Comfort
How pleasant is it outside?
Dew Point
20°C
Humid/Sticky
Heat Stress
Low
No heat warning
🙂 Best outdoor time:
Any time during daylight hours
Marine Conditions
Marine Life
No special warnings. Enjoy the swim!
Swim Index
✅ Excellent Swimming Conditions
Travel & Logistics Insights
Local Calendar
Business Day
Standard hours in Vietnam
Flight Traffic
Busy
76/100 pressure index
Health Advisory
Required
2 vaccines • View Details →
Landing Slots
~19
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in Halong Bay
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
06:04
☀️ Noon
11:37
🌇 Sunset
17:11
⏱️ Daylight
11h 6m
Wind Speed
15 km/h
Gentle breeze
Sunshine
7.7 hrs
Direct Sun (Cloud-free)
Humidity
75%
Humid / Damp
Travel Intelligence
Exclusive flight analytics & health data for Halong Bay
Smart Flight Estimator
Airport-to-Airport Logistics
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Travel Health & Safety in Halong Bay
Travel Comfort Index
Real-time tourism conditions
Weather Quality
☀️ Excellent
Tourist Crowds
🟢 Moderate
Price Level
💰💰 Moderate
Health & Wellbeing
Meteo-Health Forecast
Moderate fluctuations. Some sensitivity possible.
Weather unlikely to affect joint pain.
Moderate fish activity expected.
Unhealthy for sensitive groups. Consider wearing a mask outdoors.
Regional Safety Profile
Seismic Activity
Zero seismic activity detected in 30 years.
Typhoon Risk
Year-round risk present
Travel Alert: This region has elevated natural risks. We recommend registering with your embassy and keeping emergency numbers handy.
"According to 30YearWeather's analysis of 30 years of NASA satellite data, Halong Bay on November 18 averages 24.7°C with a 15% precipitation probability. Wedding/Outdoor Event Score: 100/100."
— Source: 30YearWeather.com|Data: NASA POWER (1991-2021)|View Methodology
Halong Bay Weather History (2010–2024)
Temperature History
Hall of Fame
Records from last 10 years
Compare Other Cities
Same date (November 18) in other destinations
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📍 Is Halong Bay Worth Visiting on November 18?
Planning a trip to Halong Bay on November 18? Our historical weather analysis based on 30 years of NASA satellite data shows that this time of year is characterized by pleasant mild weather averaging 24.7°C with a 15% historical precipitation risk.
✈️ Travel Logistics: Approximately 19 landing slots available daily during this period, indicating manageable crowd levels.
💉 Health Advisory: 10 vaccinations are recommended for Vietnam, including COVID-19.
🌊 Coastal Conditions: Water temperature averages 24.7°C (swimming pool). Wave conditions are generally lake-like with heights around 0.49m.
📊 Historical Extremes: The hottest November 18 recorded in the last 30 years saw temperatures hit 28.7°C in 2024, while the coldest dropped to 12.5°C in 2025.