Lan Ha Bay weather
Current conditions
Averages and extremes
Yesterday's Data
Overview of Lan Ha Bay weather
Boasting an ideal location between southern Halong Bay and Eastern Cat Ba Island, Lan Ha Bay enjoys a mild climate throughout the year. Its summer temperatures are moderate, and winters are mild, with average temperatures ranging from 25 to 28°C. Sudden storms may occur in summer, accompanied by northeast monsoons in winter. The period from April to July is the optimal time to visit Lan Ha Bay due to pleasant breezes, abundant sunshine, and crystal-clear views. This season is also the most favorable for engaging in water activities within the bay.
Weather in Spring (February - April)
- Lowest temperature: 16°C
- Highest temperature: 28°C
Spring in Lan Ha Bay is characterized by warmth and gentle sunshine. The average temperature ranges from 18 to 26°C, although occasional drizzles can cause the temperature to dip to around 15 - 16°C. Overall, spring offers an exceptional opportunity for sightseeing and partaking in outdoor activities.
Weather in Summer (May - September)
- Lowest temperature: 24°C
- Highest temperature: 33°C
Summers in Lan Ha Bay are hot and humid. Average temperatures range between 26 and 33°C, with humidity levels potentially reaching 86%. The months of July and August typically receive the most rainfall, with a rain probability of 55 - 59%. Nevertheless, the skies are often bright and sunny, making it a great time for swimming, kayaking, and exploring the bay's caves.
Weather in Autumn (October - November)
- Lowest temperature: 19°C
- Highest temperature: 29°C
Like many northern provinces, autumn is considered the best season in Lan Ha Bay. The frequency of rain and storms significantly diminishes during this time. Sunshine is softer, and the skies are typically blue and clear, with temperatures ranging from 20 to 32°C.
Weather in Winter (December - January)
- Lowest temperature: 14°C
- Highest temperature: 22°C
While December and January mark the coldest months in the bay, the weather is still considerably milder compared to mainland regions. Early mornings often feature dense fog, which usually dissipates after a few hours. Winter is also the season with the least rainfall in the bay.
Weather averages by month
| Month | High / Low (°C) | Rain |
|---|---|---|
| January | 19°C / 14°C | 8 days |
| February | 22°C / 16°C | 5 days |
| March | 23°C / 18°C | 9 days |
| April | 28°C / 22°C | 11 days |
| May | 31°C / 24°C | 14 days |
| June | 33°C / 26°C | 18 days |
| July | 33°C / 26°C | 17 days |
| August | 32°C / 26°C | 19 days |
| September | 32°C / 25°C | 20 days |
| October | 29°C / 22°C | 11 days |
| November | 26°C / 19°C | 7 days |
| December | 22°C / 15°C | 5 days |
Frequently asked questions
1. When does it often rain in Lan Ha Bay?
From June to September, rainfall is common, with July being the wettest month, averaging approximately 27 rainy days in 2025. This trend showcases an increase in precipitation, affecting weather patterns across regions during these months.
2. When is the coldest month in Lan Ha Bay?
The coldest month in Lan Ha Bay is January, with temperatures ranging from 12 - 18°C in 2025. Visitors can expect cool weather, making it ideal for enjoying the scenic beauty and quiet charm of the bay during this time.
3. Which month is the hottest in Lan Ha Bay?
The hottest months are now June and July, with average temperatures ranging from 27 to 34°C. Recent climate patterns indicate a warming trend, making these months increasingly sweltering.
