Heavy to Very Heavy Rain in Thailand No.9 (225/2026)

Weather Advisory

Subject: Heavy to Very Heavy Rain in Thailand

No.9 (225/2026)

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During 25 – 27 September 2026, an active low-pressure cell over the East is expected to move to  the Central including Bangkok and vicinity along the monsoon trough lies across upper Thailand. Meanwhile the southwest monsoon prevailing over the Andaman Sea, the South and the Gulf is strengthening. Isolated heavy to very heavy rains are likely over the country especially in the North, the lower Northeast, the Central including Bangkok and vicinity, the East and the South regions.

People in the country should beware of heavy to very heavy rains and accumulation that may cause flash floods, overflows and landslides especially along the waterways near foothills and lowlands.

The strengthening winds forces the wave in the upper Gulf and the upper Andaman Sea up to be
2-3 meters high and above 3 meters high in thundershowers. In the lower Gulf and the lower Andaman Sea, the waves are likely about 2 meters high and above 2 meters high in thundershowers. All ships should proceed with caution and keep off thundershowers, small boat in the upper Gulf and the upper Andaman Sea keep ashore lasting 27 September 2026.

The advisory is in effect on 25 September 2026, at 5.00 p.m.
 This next issue will be on 26 September 2026, at 5.00 a.m.

                                                                 (Signed)    Sugunyanee Yavinchan

                                                                            (Miss Sugunyanee Yavinchan)                            

                                                                                      Director-General                        

                                                                          Thai Meteorological Department