Monthly weather overview

iconHa Long monthly weather overview Vietnam · 하롱

A quick, year-round overview of monthly and seasonal weather in Ha Long. Use this page to get a feel for which months and seasons match your travel style.

Ha Long Bay weather at a glance

  • Ha Long Bay is on Vietnam’s northern coast, with a strong contrast between hot, humid summers and cool, damp winters. On the water, wind can change perceived temperature quickly.
  • A common pattern is: hot/humid months with frequent showers (May–Sep), lighter autumn (Oct–Nov), cool/damp winter (Dec–Feb), and variable spring (Mar–Apr).
  • Cruise comfort is often shaped by wind, rain, and sea conditions more than the temperature number. Deck time can feel much cooler than on land.
  • Summer rain can be short and intense, reducing visibility and interrupting movement—waterproofing essentials can matter more than an umbrella.
  • In winter, cloudy and misty days can feel clammy, and indoor heating can be limited—layers help.
Dec · Jan · Feb

Winter (cool + damp): wind and humidity can amplify the chill

Avg low 13–16°C / high 18–21°C · Rainy days: 6–12 / 20–60 mm

  • Wind on the bay can drop perceived temperature.
  • Cloud/mist can make it feel clammy.
  • Cruises can feel warm inside but chilly on deck—layers help.

Suggested outfits

  • · Light knit/hoodie + windbreaker
  • · Long pants/socks
  • · Water-safe pouch for damp weather

A note for travelers

In winter, the number matters less than wind on deck. A thin windbreaker goes a long way.

Mar · Apr · Oct · Nov

Shoulder seasons (variable): mixed days, with wind/visibility changing comfort

Avg low 18–23°C / high 24–30°C · Rainy days: 5–12 / 40–140 mm

  • Some days shift noticeably within a day.
  • On the bay, breeze can make it feel lighter.
  • Rain can raise humidity and create a heavier feel.

Suggested outfits

  • · T-shirt + light outer layer
  • · Water-safe pouch/compact umbrella
  • · Breathable shoes

A note for travelers

Shoulder months reward easy layering—especially for deck time.

May · Jun · Jul · Aug · Sep

Summer (hot + humid + showers): include storm and schedule-variability thinking

Avg low 25–27°C / high 30–34°C · Rainy days: 12–22 / 170–320 mm (often peaking Jul–Aug)

  • Heat can feel heavy with humidity.
  • Short intense showers can interrupt cruises and visibility.
  • Breeze can help briefly, but dampness can add discomfort.

Suggested outfits

  • · Quick-dry fabrics
  • · Water-safe pouch
  • · Footwear you can get wet in

A note for travelers

In summer, a pause-and-move rhythm around rain often works best.

Want detailed monthly weather?

Pick a month below to see detailed average temperatures, rainfall, outfit ideas, and travel tips.

Explore Ha Long

These pages are connected so you can compare conditions and decide for yourself.

Ha Long monthly weather overview — seasons & best time to visit | CityWeather | CityWeather