Vietnam’s Shifting Weather Patterns: A Regional Outlook for March 20th, 2026
Vietnam is experiencing a dual climate threat, according to the National Center for Hydrometeorological Forecasting (NCHMF). While central regions brace for potential flooding from heavy rainfall, the north is preparing for its most significant cold spell of the early winter season.
Northern Vietnam: Cold Snap and Foggy Conditions
Northern Vietnam, from Thanh Hoa to Hue, will begin the day with foggy conditions, giving way to sunshine in the afternoon. Mountainous and midland areas can expect scattered showers and localized thunderstorms later this evening. Temperatures in Hanoi will range from 21-23°C (minimum) to 26-28°C (maximum). The northwest region will see temperatures between 19-23°C and 29-32°C, while the northeast will experience 19-23°C to 25-28°C.
Central Vietnam: Flood Risks and River Levels
A period of potential flooding is forecast for waterways from Ha Tinh to Khanh Hoa between November 17th and 20th. River levels may reach or exceed alert levels 2 and 3 on several rivers, including those in Hue, Da Nang, and Quang Ngai. The Kon River (Gia Lai, Dak Lak) and the Ky Lo and Dinh rivers (Khanh Hoa) are also at risk. Other areas, including Ha Tinh, Quang Tri, Gia Lai, Dak Lak, and Khanh Hoa, could see alert levels 1 or 2.
Southern Vietnam: Increasing Heat and Stable Conditions
Southern Vietnam is currently under the influence of a low-pressure zone and a subtropical anticyclone. The weather will be mostly cloudy with sunny spells and increasing heat. Maximum temperatures will generally be between 32 and 35°C, with some areas in the southeast potentially exceeding 35°C. Ho Chi Minh City is expected to see temperatures between 23-25°C (minimum) and 32-34°C (maximum).
Hydroelectric Dam Water Levels in the North
As of March 16th, 2026, many hydroelectric reservoirs in northern Vietnam are at high levels. Son La Lake is just 0.33 meters below its normal water level. Tuyen Quang reservoir is approximately 5 meters below its normal level, with water discharge exceeding inflow. Lai Chau Lake is nearly at its normal water level, while Ban Chat Lake is more than 30 meters below normal. Huoi Quang Lake is close to its normal level, and Son La reservoir is also just below normal.
Long-Term Implications of Shifting Weather
These recent weather events highlight the increasing variability of Vietnam’s climate. While specific long-term trends require further study, the combination of increased heat in the south and more frequent extreme weather events in other regions suggests a need for enhanced infrastructure resilience and improved disaster management strategies.
Frequently Asked Questions
- What is the current weather situation in Hanoi? The sky will be cloudy with fog in the morning, clearing to sunshine in the afternoon. Temperatures will range from 21-23°C to 26-28°C.
- Which regions are at risk of flooding? Areas along waterways from Ha Tinh to Khanh Hoa are at risk of flooding between November 17th and 20th.
- How hot is it expected to get in Southern Vietnam? Maximum temperatures will generally be between 32 and 35°C, with some areas exceeding 35°C.
For more detailed information, visit the National Center for Hydrometeorological Forecasting website: https://nchmf.gov.vn/KttvsiteE/en-US/2/index.html
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