Ha Long Bay: Weather Guide & Climate
Complete month-by-month weather guide: Ha Long Bay. Best time to visit: March, April, May, September, October, November. Plan your trip with detailed climate data.
Climate Overview
Ha Long Bay has a moderate climate with average yearly highs of 26°C, lows of 22°C, and approximately 16 rainy days per month.
The best time to visit Ha Long Bay is during March, April, May, September, October, November, when conditions are perfect for sightseeing and exploration
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Air Quality
Best Time
Mar, Apr, May, Sep, Oct, Nov
Hottest
Coldest
Driest Month
Forecast for your trip dates
Up to 16 days ahead| Month | High | Low | Rainy days | Condition |
|---|---|---|---|---|
| January | 21°C | 17°C | 14 | Wet |
| February | 21°C | 17°C | 12 | Good |
| March | 24°C | 20°C | 17 | Excellent (best) |
| April | 24°C | 20°C | 13 | Excellent (best) |
| May | 30°C | 26°C | 15 | Excellent (best) |
| June | 32°C | 29°C | 19 | Wet |
| July | 31°C | 28°C | 22 | Wet |
| August | 30°C | 26°C | 27 | Wet |
| September | 30°C | 26°C | 29 | Excellent (best) |
| October | 27°C | 22°C | 11 | Excellent (best) |
| November | 26°C | 20°C | 3 | Excellent (best) |
| December | 20°C | 15°C | 5 | Good |
Weather data: Open-Meteo Archive (2020-2025) • Open-Meteo.com (CC BY 4.0) • Historical avg. 2020–2025
Weather by Season
Winter
Dec–Feb
High: 21°C
Low: 16°C
Rainy days: 10 days/month
Spring
Mar–May
High: 26°C
Low: 22°C
Rainy days: 15 days/month
Summer
Jun–Aug
High: 31°C
Low: 28°C
Rainy days: 23 days/month
Autumn
Sep–Nov
High: 28°C
Low: 23°C
Rainy days: 14 days/month
Month-by-Month Weather Table
January
February
March
BestApril
BestMay
BestJune
July
August
September
BestOctober
BestNovember
BestDecember
| Month | High | Low | Rainy days | Condition | View Details |
|---|---|---|---|---|---|
| January | 21°C | 17°C | 14 | Wet | View Details → |
| February | 21°C | 17°C | 12 | Good | View Details → |
| March (best) | 24°C | 20°C | 17 | Excellent | View Details → |
| April (best) | 24°C | 20°C | 13 | Excellent | View Details → |
| May (best) | 30°C | 26°C | 15 | Excellent | View Details → |
| June | 32°C | 29°C | 19 | Wet | View Details → |
| July | 31°C | 28°C | 22 | Wet | View Details → |
| August | 30°C | 26°C | 27 | Wet | View Details → |
| September (best) | 30°C | 26°C | 29 | Excellent | View Details → |
| October (best) | 27°C | 22°C | 11 | Excellent | View Details → |
| November (best) | 26°C | 20°C | 3 | Excellent | View Details → |
| December | 20°C | 15°C | 5 | Good | View Details → |
Ha Long Bay
UNESCO World Heritage Bay with 1,600 limestone karst islands rising dramatically from emerald waters, overnight junk boat cruises, kayaking through caves, floating villages, and one of Vietnam's most iconic natural wonders.
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Common Questions
What type of climate does Ha Long Bay have?
Ha Long Bay has a Moderate climate with average yearly temperatures of 26°C (highs) and 22°C (lows).
When is the best time to visit Ha Long Bay?
The best time to visit Ha Long Bay is during March, April, May, September, October, November, when temperatures average around 24°C and conditions are ideal for sightseeing.
What are the hottest and coldest months in Ha Long Bay?
The hottest month in Ha Long Bay is June with average highs of 32°C, while the coldest is December with average lows of 15°C.
When is the rainy season in Ha Long Bay?
Ha Long Bay sees the most rain in September (29 rainy days), while November is the driest month (3 rainy days).
More Ha Long Bay Guides
Best Time to Visit
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Things to Do
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Itineraries
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Overview
Complete travel guide for Ha Long Bay: top things to do, itineraries, and typical costs.