Region in Quang Ninh, Vietnam
Ha Long Bay weather by month and the best time to visit
When to go to Ha Long Bay
Mar–Apr and Oct–Nov are mild and clearer. Dec–Feb is cold and misty; Jun–Sep is hot, humid and storm-prone, and cruises are cancelled in typhoons.
Ha Long Bay weather by month
Average daily high, rainfall and conditions.
- Jan20°39 mm
- Feb22°25 mm
- Mar25°50 mm
- Apr28°69 mm
- May30°168 mm
- Jun31°213 mm
- Jul31°302 mm
- Aug31°338 mm
- Sep30°240 mm
- Oct28°122 mm
- Nov25°51 mm
- Dec21°28 mm
Monthly averages
| Month | High | Low | Rain | Humidity | Conditions |
|---|---|---|---|---|---|
| January | 20°C69°F | 12°C54°F | 39 mm | 79% | Pleasant |
| February | 22°C72°F | 14°C58°F | 25 mm | 81% | Pleasant |
| March | 25°C77°F | 17°C63°F | 50 mm | 82% | Pleasant |
| April | 28°C83°F | 21°C70°F | 69 mm | 82% | Pleasant |
| May | 30°C87°F | 25°C76°F | 168 mm | 84% | Rainy |
| June | 31°C88°F | 27°C80°F | 213 mm | 86% | Rainy |
| July | 31°C88°F | 27°C80°F | 302 mm | 86% | Very wet |
| August | 31°C87°F | 26°C80°F | 338 mm | 86% | Very wet |
| September | 30°C87°F | 25°C77°F | 240 mm | 83% | Rainy |
| October | 28°C83°F | 22°C72°F | 122 mm | 80% | Pleasant |
| November | 25°C78°F | 18°C65°F | 51 mm | 79% | Pleasant |
| December | 21°C70°F | 14°C56°F | 28 mm | 76% | Pleasant |
Best months across Vietnam
| Place | Best months | Warmest month |
|---|---|---|
| Ho Chi Minh City | Dec–Mar | Mar (37°C) |
| Hanoi | Mar–Apr, Oct–Nov | Jun (32°C) |
| Da Nang | Feb–Jun | Jun (33°C) |
| Hoi An | Feb–May | Jun (32°C) |
| Ha Long Bay | Mar–Apr, Oct–Nov | Jun (31°C) |
| Nha Trang | Jan–Jun | May (30°C) |
| Phu Quoc | Nov–Mar | May (30°C) |
| Sapa | Mar–May, Sep–Oct | Jun (26°C) |
| Hue | Feb–May | Jun (33°C) |
| Ninh Binh | Mar–May, Sep–Oct | Jun (32°C) |
| Da Lat | Dec–Mar | Apr (25°C) |
| Ha Giang | Mar–Apr, Sep–Nov | May (34°C) |
| Mui Ne | Nov–Apr | Apr (33°C) |
| Phong Nha | Mar–Jul | May (34°C) |
| Cat Ba | Apr–May, Oct–Nov | Jul (30°C) |
| Vung Tau | Nov–Apr | Apr (34°C) |
| Quy Nhon | Feb–Jun | Aug (31°C) |
| Can Tho | Dec–Apr | Apr (36°C) |
| Con Dao | Mar–Jul | May (29°C) |
| Cao Bang | Apr, Sep–Nov | May (31°C) |
| Mai Chau | Mar–Apr, Sep–Nov | May (34°C) |
Quick answers
What is the best month to visit Ha Long Bay?
Mar–Apr, Oct–Nov. Mar–Apr and Oct–Nov are mild and clearer. Dec–Feb is cold and misty; Jun–Sep is hot, humid and storm-prone, and cruises are cancelled in typhoons.
When is the rainy season in Ha Long Bay?
Rain peaks in August with about 338 mm. Months with 150 mm or more: May–Sep.
What is the hottest month in Ha Long Bay?
June, with average highs of 31°C (88°F).
How cold does Ha Long Bay get?
The coolest nights are in January, averaging 12°C (54°F).
More about Ha Long Bay
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Sources
- NASA POWER climatology (2001–2020)
- Ha Long Bay (UNESCO World Heritage Centre)
- Noi Bai International Airport (ACV)
Climate averages are modelled from NASA POWER (MERRA-2) for 2001–2020 at about 50 km resolution, so coasts and valleys can differ a little. Temperatures are adjusted by 0.6°C for the city's elevation. Compiled and reviewed by SoloSquare. How we compile and score this. Spotted something out of date? Tell us.