Weather: Ha Long Bay — May
The weather is near-perfect with ideal temperatures and minimal rain. Recommended month to visit.
🌟 Climate Overview
May is an excellent time to visit Ha Long Bay. Hot conditions with temperatures reaching 31°C—stay hydrated and seek shade. This is one of the wettest months—waterproof gear is essential. As peak season, expect higher prices and more tourists. Sea temperature of 29°C is perfect for swimming.
Based on weather comfort, crowds, prices, and activity options
31°C
26°C
20days
13.1h
Feels like 37°C / 31°C — humidity makes it feel warmer
154mm
9.7h/day
83%
Very Muggy7.4
Very High16 km/h (gusts 35)
29°C 🏊 Comfortable
Is May a good time to visit Ha Long Bay?
The weather is near-perfect with ideal temperatures and minimal rain.
Now
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Air Quality
Travel Context
- CrowdsVery Busy
- Travel Costs Value Rates
Daylight
05:15
18:22
Visiting Ha Long Bay in May: Pros & Cons
Pros
- Abundant sunshine for beach and outdoor fun
- Warm sea perfect for swimming and snorkeling
- One of the best months to visit
Cons
- Frequent rain may disrupt outdoor activities
- Peak season — expect crowds and higher prices
- High humidity makes the heat feel oppressive
Things to Do in May
Recommended for This Weather
Ha Long Bay Weather by Month
| Month | Avg High | Avg Low | Rain | Sunshine | Humidity | UV Index | Crowds | Condition |
|---|---|---|---|---|---|---|---|---|
| Jan | 21°C | 16°C | 7d (34mm) | 6.4h | 76% Humid | 4.1 Moderate | | Good |
| Feb | 21°C | 17°C | 6d (33mm) | 5.7h | 82% Very Humid | 4.4 Moderate | | Good |
| Mar | 24°C | 20°C | 10d (31mm) | 6.7h | 84% Very Humid | 5.3 High | | Excellent |
| Apr | 27°C | 23°C | 11d (59mm) | 8.7h | 83% Very Humid | 6.8 High | | Excellent |
| May Current | 31°C | 26°C | 20d (154mm) | 9.7h | 83% Very Muggy | 7.4 Very High | | Excellent |
| Jun | 33°C | 28°C | 22d (271mm) | 8.7h | 82% Very Muggy | 7.3 Very High | | Wet |
| Jul | 33°C | 28°C | 23d (280mm) | 9.7h | 83% Very Muggy | 7.7 Very High | | Wet |
| Aug | 32°C | 27°C | 28d (400mm) | 7.7h | 85% Very Muggy | 6.4 High | | Wet |
| Sep | 31°C | 26°C | 26d (366mm) | 7.8h | 84% Very Muggy | 6 High | | Excellent |
| Oct | 29°C | 23°C | 14d (156mm) | 8.1h | 76% Muggy | 5.9 High | | Excellent |
| Nov | 27°C | 21°C | 7d (32mm) | 8.4h | 74% Humid | 5.3 High | | Excellent |
| Dec | 22°C | 17°C | 3d (12mm) | 7.1h | 69% Humid | 4.4 Moderate | | Good |
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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What to Pack for May
Light, breathable fabrics like cotton and linen are essential. Opt for loose-fitting clothing in light colors to stay cool. A waterproof jacket and shoes are non-negotiable — showers are frequent. Don't forget a wide-brimmed hat and high-SPF sunscreen — the sun is strong.
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Frequently Asked Questions
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More Ha Long Bay Guides
Best Time to Visit
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Things to Do
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Where to Stay
Best neighborhoods and hotel recommendations
Cost & Budget
Daily costs, money-saving tips, and budget breakdown
Itineraries
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Overview
Complete travel guide for Ha Long Bay: top things to do, itineraries, and typical costs.