Bangkok: Heavy rain is anticipated across Thailand from July 29th to August 1st, with warnings issued for potential flash floods and landslides. The Meteorological Department has advised the public to remain cautious as heavy to very heavy rainfall is expected in certain areas of the Northeast, East, and South. Regions including the North and Central areas, as well as Bangkok and its surrounding provinces, are also likely to experience significant rainfall. This weather pattern is attributed to a monsoon trough affecting the upper North and Northeast, coupled with a strong southwest monsoon over the Andaman Sea, Thailand, and the Gulf of Thailand.
According to Thai News Agency, wave conditions in the upper Andaman Sea are predicted to be particularly rough, with waves reaching heights of 2-3 meters. In areas experiencing thunderstorms, wave heights could exceed 3 meters. Similarly, the lower Andaman Sea and upper Gulf of Thailand will see waves approximately 2 meters high, with potential increases during thunderstorms. Mariners are advised to exercise caution, avoiding sailing in storm-affected regions, and small boats in the upper Andaman Sea are discouraged from leaving shore during this period.
The forecast indicates that from July 29th to August 1st, Thailand will experience significant rainfall, with some areas facing very heavy rain due to a monsoon trough over the northern and upper northeastern regions, alongside a strong southwest monsoon. Although rainfall is expected to decrease from August 2nd to 4th, heavy rains may still occur in certain northern and upper northeastern locations, with the monsoon trough extending over the upper northern region and upper Laos, while the southwest monsoon weakens.
Strong winds and elevated wave conditions are expected, particularly from July 29-30, with the upper Andaman Sea experiencing waves of 2-3 meters, exceeding 3 meters during thunderstorms. The upper Gulf of Thailand and lower Andaman Sea will have waves around 2 meters high, potentially rising above 2 meters in stormy conditions. The period from July 31 to August 4 will see a weakening in wind and wave intensity, with the upper Andaman Sea experiencing waves around 2 meters, and the upper Gulf of Thailand and lower Andaman Sea seeing waves between 1-2 meters, with potential increases during thunderstorms.
Caution is advised for residents throughout Thailand from July 29th to August 1st, as the risk of flash floods, landslides, and river overflows is heightened, particularly in hillside regions near waterways and low-lying areas. Small boats should avoid venturing into sea areas during this timeframe to ensure safety.
In related seismic activity, several earthquakes were recorded between July 28-29, 2026, including a magnitude 3.6 earthquake with its epicenter in Laos, a magnitude 4.4 earthquake in the Andaman Islands, India, and magnitudes 3.3, 3.4, and 2.4 in Myanmar, as well as a magnitude 3.7 quake along the Myanmar-China border. These seismic events posed no threat to Thailand.