Heavy to very heavy rains in Thailand, Strong Wind-Waves in the Andaman Sea No. 12 (90/2026)

Weather Advisory

Subject: Heavy to very heavy rains in Thailand,

Strong Wind-Waves in the Andaman Sea

No. 12 (90/2026)

----------------------------

The rather strong southwest monsoon prevails over the Andaman Sea, the South and the Gulf while the monsoon trough lies across upper Thailand. Continuous rainfalls and isolated heavy rains are forecast in the country while isolated very heavy rains are possible in the South (west coast) region. People in Thailand should beware of heavy to very heavy rains and its accumulation that may cause flash flood and overflows, especially along foothills near waterways and lowlands.

The rather strong wind forces the waves in the upper Andaman Sea from Phuket northward up to be 2–3 meters high and above 3 meters high in thundershowers. In the lower Andaman Sea from Krabi downward, the waves are expected about 2 meters high and above 2 meters high in thundershowers. All ships should proceed with caution and keep off thundershowers, small boats in the upper Andaman Sea keep ashore.

                                          The final advisory is in effect on 1 June 2026, at 5.00 p.m.

                                                                 (Signed)   Sugunyanee Yavinchan

                       (Miss Sugunyanee Yavinchan)                            

                                  Director-General                        

                      Thai Meteorological Department