According to the national centre for hydro-meteorological forecasting, a weakening cold air mass will bring light rain and patchy morning fog on March 24-25, followed by sunshine later in the day.
Scattered showers and isolated thunderstorms may affect mountainous areas around March 28-29, while hot conditions are expected in parts of the northwest from March 30.
From Thanh Hoa to Hue, light fog is forecast over the next two to three days, with sunshine returning by midday.
South-central coastal areas are expected to remain largely dry and sunny, with temperatures rising from midweek and localised heat possible.
Southern Vietnam and the Central Highlands will stay mostly dry, with limited rainfall and occasional evening thunderstorms in the southwest. Localised heat is also forecast in the southeast.
In Hanoi, light rain is expected on March 24, with skies clearing by midday and temperatures reaching up to 29 degrees Celsius.