According to the National Center for Hydro-Meteorological Forecasting, from early morning on March 29, cold air will affect the North Central region and most places in the Northwest; then affect some places in the Central Central region.
The northeast wind gradually strengthens to level 2-3, coastal areas level 3-4. From the night of March 28, the weather in the North will turn cold. From March 29, the North Central region will turn cold. The lowest temperature in this cold air mass in the North is generally from 15-18 degrees Celsius, in high mountainous areas it is below 13 degrees Celsius, in the North Central region it is generally 17-19 degrees Celsius.

In Hanoi, from the night of March 28, the weather will turn cold. The lowest temperature in the cold air mass is from 16-18 degrees Celsius.
The cold air will affect the Northern and North Central regions until the end of next week. Hanoi temperature ranges from 17-22 degrees Celsius, cloudy sky, rain in some places. By the end of next week (May 4-5), the temperature will gradually increase, and the weather will be sunny.
It is forecasted that from the evening of March 28, the Northeast wind in the Gulf of Tonkin will gradually increase to level 6, gusting to level 7-8, rough seas, waves 2.0-3.0m high. From the night of March 28, the North of the North East Sea will have strong northeast winds of level 6, sometimes level 7, gusting to level 8, rough seas, waves 3.0-5.0m high.
From the night of March 28, the North and North Central regions will have scattered showers and thunderstorms. People and tourists should pay attention to bring warm clothes and thermal clothing when going out. Don't forget to prepare an umbrella and raincoat, beware of sudden changes in weather.