According to the National Center for Hydro-Meteorological Forecasting, the Southern region has light rain in some places, sunny days. The highest temperature is commonly from 31 - 33 degrees C, in some places higher.
The water level at stations in the Mekong River basin changes slowly and is at a level higher than the multi-year average (period 2012 - 2024) from 0.1 - 1m.
The water level on the Tien and Hau rivers is fluctuating according to the tide with an upward trend. The highest water level of the week in Tan Chau is 1.45m (March 19), in Chau Doc is 1.55m (March 15), higher than the multi-year average of the same period from 0.3 - 0.35m.
The tidal water level at Vung Tau station is rising. The highest water level in the past 10 days at Vung Tau station is 3.89m (March 19).
Saline intrusion in the Mekong Delta tends to gradually increase at the end of the week. Salineity at stations is generally lower than the highest salinity in March 2025.
Forecast for the next 10 days, the Southwest region will be sunny during the day, with hot sun in some places, and light rain in some places in the evening and at night. The highest temperature in the whole region is commonly from 32 - 35 degrees Celsius, and higher in some places.
The water level at stations on the main Mekong River fluke changes slowly and is at a level 0.2 - 1.5m higher than the multi-year average. The water level on the Tien and Hau rivers fluctuates according to the tide. The highest water level of the week in Tan Chau is 1.5m, in Chau Doc is 1.6m, at a level 0.15 - 0.3m higher than the multi-year average of the same period.
The tidal water level at Vung Tau station from March 21st to 31st. 3 fluctuates at an average level, the peak tide fluctuates in the range of 3.8 - 3.9m. The peak tide appears mainly around 3 to 5 am and 12 to 18 pm daily.
The tidal water level in the West Sea (Rach Gia station) from March 21st to March 31st, the tidal water level fluctuates at an average level, the peak tide fluctuates in the range of 0.5-0.7m, the appearance time is around 20 to 23 hours daily.
Regarding the trend of saltwater intrusion from March 21st to March 31st, 2026 in the Mekong Delta, it continues to increase in the first days of the week, then gradually decreases at the end of the week. The highest salinity at stations is lower than the highest salinity in March 2025.
The meteorological agency recommends that localities take advantage of storing fresh water during low tides to serve agriculture and people's livelihoods.
Saltwater intrusion in the Mekong Delta in the dry season of 2025-2026 is lower than in 2024-2025 and the average of many years. Increased saltwater intrusions at the mouth of the Mekong River are likely to concentrate in March 2026 and April 2026 (from March 20-25; March 30 - April 3-4); Vam Co and Cai Lon rivers in March 2026 and April 2026 (from March 20-25; March 30 - April 3-4; April 18 - April 21).
The meteorological agency warns that the level of natural disaster risk due to saltwater intrusion is level 1.
