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Live forecasts update automatically; written guidance last reviewed 23 June 2026 by the Coast Monitor Weather Desk. Data from the Bureau of Meteorology (BOM) and other national met services via Open-Meteo.
Check the live forecast above before heading out on Ha Long Bay, as conditions shift quickly between misty calm and sudden squalls. Expect warm, humid weather year-round, with the dry season from October to April offering the most reliable cruising conditions.
What is the typical weather pattern for Ha Long Bay?
Ha Long Bay has a tropical monsoon climate with two distinct seasons. The dry season (October to April) brings cooler, drier air, calm seas and clearer skies, making it the preferred time for boat tours. The wet season (May to September) is hotter, with higher humidity, frequent rain and a higher chance of tropical storms. Average temperatures range from 17°C in January to 30°C in July.
How does the weather vary by month?
If you are planning around ha long bay weather by month, the coolest period is December to February, when temperatures drop to 15–20°C and fog can reduce visibility. March to May is warm and increasingly humid, with occasional drizzle. June to August is the peak of the wet season, with heavy downpours and strong winds. September to November sees decreasing rain and a return to calmer conditions.
What is the weather in Ha Long Bay in December?
Ha long bay weather december is generally cool and dry, with daytime highs around 20–23°C and lows near 15°C. Fog is common in the mornings, but afternoons are often clear. It is a good time for cruising, though you will need a light jacket.
Is there a reliable 14-day forecast for Ha Long Bay?
A halong bay weather forecast 14 days is less reliable than shorter-term predictions due to the bay’s microclimate. For practical planning, use the live forecast above for the coming days and check a weather in ha long bay 10 days outlook for trends.
Can I check the weather in Fahrenheit?
Ha long bay weather fahrenheit conversions are not standard on Australian sites. Most local and international forecasts use Celsius. For a quick conversion, multiply the Celsius reading by 1.8 and add 32.
For more Australian coastal conditions, visit our Australia weather hub or check Sydney Weather and Brisbane Weather for comparisons.