On 7 October, during a seasonal monsoon and tropical depressions over the Khánh Hòa province, several multitude of tropical cyclones during the 2020 Pacific typhoon season, such as Linfa, Nangka, Ofel, Saudel, and Molave, struck the northern and central regions of Vietnam, especially in areas of Laos and Cambodia, bringing high winds and excessive rainfall in these affected provinces, with accumulations peaked at 3,245 mm (127.8 in) in Hướng Linh, Hướng Hóa District, Quảng Trị around 20 October.

[10] On 5 November, the weakening Typhoon Goni entered the South China Sea and made landfall in Central Vietnam two days later as a tropical depression.

On 12 November, Typhoon Vamco approached Vietnam as it gradually strengthened into Category 4-equivalent status after exiting the Philippine Area of Responsibility.

As of 1 December, over 243 people were reported by Vietnam Disaster Management Authority (VNDMA) as dead or missing due to the floods.

[12] Enhanced by the seasonal northeast monsoon, many provinces nearby suffered heavy rainfall with average accumulations of 200–300 mm.

On the night of 11 October, heavy rainfall attributed from typhoon Linfa resulted in landslide at the Rào Trăng 3 Hydropower Plant in Phong Điền District of Thua Thien Hue province, leaving 17 construction workers missing.

[18] On 12 October 2020, a military rescue team sent to the missing workers was hit by another landslide, killing Major General Nguyễn Văn Man and 12 other soldiers.

[25] Ofel made landfall after entering the South China Sea then dissipated in Central Vietnam on 16 October.

As Saudel approached Vietnam, it began to rapidly weaken due to high vertical wind shear and was downgraded to a tropical storm on 24 October 2020.

[31] Nearly 1.3 million people were evacuated in Vietnam, as Prime Minister Nguyen Xuan Phuc ordered boats onshore and advised preparations for the security force and residents in the area.

[39] Molave brought heavy rains; Sơn Kỳ (Quảng Ngãi) received 18.50 inches (470 mm) of rainfall over 24 hours.

Goni's convection decoupled from its low-level circulation as a result of anticyclonic wind shear generated by the nearby Tropical Storm Atsani (Siony) from Northern Luzon combined with cooler water.

Goni's trough then brought showers, thunderstorms, and more flooding to an already rain-stricken Vietnam from the previous Linfa, Nangka, Ofel, Saudel and Molave which had all struck a few days earlier.

According to the National Center for Hydro-Meteorological Forecasting, the storm would hit Da Nang and Phu Yen provinces on 5 November.

On 3 November, just two days before the expected landfall, the only preparations done were to institute a no-sail policy within the storm's path which affected about 50,000 fishing boats.

Etau killed two people in Quảng Nam and Bình Định and damaged 31 houses when it made landfall in central Vietnam on 10 November.

[58] On the morning of that same day, all flights in 5 airports, including Da Nang, Chu Lai, Phu Bai, Dong Hoi and Vinh, were ordered to be suspended or delayed.

[60] Strong winds downed many trees and damaged numerous homes the four provinces of Hà Tĩnh to Thừa Thiên Huế.

[60] In Thuận An, Thừa Thiên Huế, strong waves lashed docking fishing ships and civilian houses.

[61] In the city of Da Nang, storm surge destroyed many sea embankments, while washing rocks and debris onshore, and into streets.

[17] In Thừa Thiên Huế, its mountainous districts received the heaviest amounts of rainfall in the region, mostly came from tropical storm Linfa.

[70] In total, floods caused 31 deaths and approximate 2,000 billion VND ($86.29 million) in damages in Thừa Thiên Huế.

[76] Floods and landslides due to 91W, Linfa and Ofel caused 6 deaths in Quảng Ngãi, Gia Lai, Đắk Lắk, Lâm Đồng and Kon Tum.

[67] The Vietnamese government has granted VND500 billion ($21.52 million) to five provinces worst-hit by the floods for rescue and social welfare support.