March 25 is generally a great time to visit Halong Bay. While there is a slight chance of rain (20%), showers are usually brief. Expect comfortable 24°C weather. Halong Bay is seeing high visitor numbers, so iconic spots may be busier than usual.
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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 March 25
"Mild & Comfortable. Expect average highs of 23.9°C. 20% chance of rain."
What to Wear in Halong Bay in March
Based on historical data for March 25, Halong Bay typically experiences temperatures between 19.3°C and 23.9°C. We recommend packing t-shirt, light clothing to stay comfortable. Trends suggest it will stay mostly dry (20% 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
23.9°C
Daytime Peak
Average Low
19.3°C
Nighttime Low
Feels Like
24.7°C
☀️ Feels accurate
Rain Chance
20%
Avg 1mm if it rains
Cloud Cover
76%
Light drizzle
Pressure
1013.1 hPa
Medium volatility
Halong Bay Weather Conditions & UV Index
Weather Confidence
30-year variance analysis
Based on 10 years of data
✓ This date historically delivers consistent weather 76% of the time. Safe to plan outdoor activities with confidence.
Sun Exposure
UV Index & Safety Guide
Protection Needed
SPF 15 for extended outdoor time
Type I-II
🔴 31 min to burn
Type III-IV
🟡 47 min to burn
Type V-VI
🟢 78 min to burn
UV estimate based on latitude, season & cloud cover. Actual UV may vary.
Outdoor Comfort
How pleasant is it outside?
Dew Point
21°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
72/100 pressure index
Health Advisory
Required
2 vaccines • View Details →
Landing Slots
~18
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in Halong Bay
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
05:52
☀️ Noon
11:58
🌇 Sunset
18:04
⏱️ Daylight
12h 12m
Wind Speed
15.2 km/h
Gentle breeze
Sunshine
6.0 hrs
Direct Sun (Cloud-free)
Humidity
84%
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 March 25 averages 23.9°C with a 20% precipitation probability. Wedding/Outdoor Event Score: 96/100."
— 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
Better Alternatives Nearby
Consider these dates within ±7 days
March 19
23.9°C • 14% rain
Score
100
March 20
24.1°C • 12% rain
Score
100
March 21
24.1°C • 14% rain
Score
100
💡 Moving your event by a few days could significantly improve weather conditions
Compare Other Cities
Same date (March 25) in other destinations
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📍 Is Halong Bay Worth Visiting on March 25?
Planning a trip to Halong Bay on March 25? 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 23.9°C with a 20% historical precipitation risk.
✈️ Travel Logistics: Approximately 18 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 22.5°C (swimming pool). Wave conditions are generally fun waves with heights around 0.52m.
📊 Historical Extremes: The hottest March 25 recorded in the last 30 years saw temperatures hit 27.5°C in 2023, while the coldest dropped to 14.8°C in 2016.