Heavy to Very Heavy Rain in Thailand and strong wind in the Andaman Sea No.9 (213/2026)

Weather Advisory

Subject: Heavy to Very Heavy Rain in Thailand and strong wind in the Andaman Sea

No.9 (213/2026)

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During 19 - 20 September 2026, isolated heavy is possible in the country while isolated heavy to very heavy rains are likely in the Southern region.

The high-pressure system from China extend to the upper North and upper Northeast of Thailand leads to the monsoon trough move to lie across Central, the upper South, the upper Gulf and the Eastern region. Meanwhile, the rather strong southwest monsoon prevail over the Andaman Sea, Thailand, and the Gulf.

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 rather strong winds and waves in the Andaman Sea are expected 2 - 3 meters and above 3 meters high in thundershowers. All ships should proceed with caution and keep off thundershowers. Small boat in the upper Andaman Sea should keep ashore during 19 – 20 September 2026.

The advisory is in effect on 19 September 2026, at 5.00 a.m.
This next issue will be on 19 September 2026, at 5.00 p.m.

                                                                 (Signed)    Sugunyanee Yavinchan

                                                                            (Miss Sugunyanee Yavinchan)                            

                                                                                      Director-General                        

                                                                          Thai Meteorological Department