Tropical storms or depressions are likely to appear over the East Sea in the next month, according to the National Center for Hydro-Meteorological Forecasting. Meanwhile, the North is expected to experience several spells of moderate to heavy rain and thunderstorms, alongside intensifying heat.

In its latest monthly weather outlook (covering May 21 to June 20, 2025), the center forecasts that average nationwide temperatures will generally be near seasonal norms.

However, temperatures in the northwestern part of northern Vietnam may rise 0.5 to 1 degree Celsius above average.

Rainfall is expected to exceed the long-term average by 10-25% in the northern mountainous region, Central Highlands, and the southern region.

In contrast, central and south-central Vietnam will see 5-20% less rainfall than average. Other regions will see precipitation levels close to the seasonal norm.

Notably, a tropical cyclone  -  either a storm or a tropical depression  -  is forecast to form in the East Sea during this period, consistent with the average historical frequency (0.91 events).

This may mark the first named storm of the 2025 rainy season in the East Sea.

From now until June 20, heatwaves are likely to persist in northern and central regions, with increasing intensity expected from June onward.

Additionally, several rounds of moderate to heavy rain and thunderstorms are expected across the North. The southwest monsoon will continue to bring scattered showers and storms to the Central Highlands and southern Vietnam.

Looking further ahead, from June to August 2025, ENSO (El Niño-Southern Oscillation) is expected to remain in a neutral state with a probability of 70-90%.

During this period, the number of storms or tropical depressions in the East Sea and their impact on Vietnam is predicted to be near the long-term average (approximately 5.2 events in the East Sea, with 2 making landfall).

From September to November, ENSO is forecast to remain neutral with a 55-65% probability. During these months, storm activity in the East Sea is expected to align with historical averages (around 5.9 events, with 2.9 making landfall).

The meteorological agency warns of potential hazardous weather events nationwide, including thunderstorms, lightning, hail, whirlwinds, and strong gusts.

Tropical systems and the southwest monsoon may generate strong winds and high waves, affecting marine activities.

Heatwaves, heavy rainfall, and storm-related phenomena could also negatively impact agricultural production and public health.

As heat intensifies, there is increased risk of drought, water shortages, and fire hazards in northern and central Vietnam.

Authorities also urge heightened preparedness for flooding and landslides in low-lying and mountainous areas due to potential heavy rainfall.

Bao Anh