According to the National Center for Hydro-Meteorological Forecasting, the strong cold air mass is moving south.
It is forecasted that around November 17, this cold air mass will affect the Northeast and North Central regions, then the Northwest and Central Central regions. On land, the Northeast wind will be strong at level 3-4, and coastal areas will be strong at level 4-5.
From November 17-18, the Northern region will have scattered rain. From the night of November 17, the weather in the North and North Central regions will turn cold; the high mountains of the North will have some places with severe cold. The lowest temperature in the North and North Central regions is 12-15 degrees Celsius, in high mountainous areas below 10 degrees Celsius.

The Hanoi area will turn cold from the night of November 17, with the lowest temperature of 13-15 degrees Celsius.
From November 18, a weak cold front has caused temperatures to drop slightly. During the day, the common temperature is 19-22 degrees Celsius, at night it drops to 13-14 degrees Celsius, creating a clear feeling of cold in the early morning and late evening. This is considered the coldest time of the week. People should pay attention to keeping warm when going out, especially children and the elderly.
It is forecasted that from November 20 onwards, the weather will gradually warm up. During the day, the temperature will increase back to 26-27 degrees Celsius, while at night it will remain 16-17 degrees Celsius. It will be sunny, less rainy, and the humidity will be stable.
At sea, from the evening and night of November 17, the Gulf of Tonkin will have northeast winds gradually increasing to level 7, sometimes level 8, gusting to level 9. Rough seas, waves 3.0-5.0m high.
The North East Sea area has Northeast winds gradually increasing to level 7-8, gusting to level 9-10. Rough seas, waves 4.0-6.0m high.
From November 18, the area from Quang Tri to Quang Ngai: the Northeast wind will gradually increase to level 6, sometimes level 7, gusting to level 8-9. Rough seas, waves 4.0-6.0m high.
Due to the strengthening of cold air combined with disturbances in the high-altitude East wind zone, the area from Ha Tinh to Khanh Hoa will have widespread heavy rain. Cold weather can affect livestock, poultry and crop growth.
Heavy rain can cause flooding in low-lying areas, flash floods on small rivers and streams, and landslides on steep slopes. Strong winds, gusts of wind and large waves at sea can affect ships and activities at sea.
Visitors to these areas need to proactively stay warm, prepare thick coats, scarves and gloves, and avoid outdoor activities in the early morning and late at night when the weather is clearly cold.
In mountainous provinces, cold weather combined with fog and scattered rain makes the road slippery, limited visibility, and potential risk of landslides, so visitors should limit traveling on steep mountain passes.
From Ha Tinh to Khanh Hoa, widespread heavy rain can cause flooding in low-lying areas, flash floods and landslides, visitors need to closely monitor weather warnings, avoid traveling through areas at high risk and prepare plans to change their schedule. In addition, you should bring a raincoat, anti-slip shoes and waterproof bag to protect your luggage in prolonged cold conditions.