Thai Meteorological Department has predicted widespread heavy rainfall on Saturday (17 August). Isolated heavy rainfall is likely in the North, the upper Northeast, the Central including Bangkok and vicinity, the East, and the South.

The wind and waves in the Andaman Sea and the Gulf are about one meter high and above two meters high in thundershowers and offshore.

• Northern – Fairly widespread thundershowers and isolated heavy rainfall in Mae Hong Son, Chiang Mai, Chiang Rai, Lampang, Phayao, Nan, Phrae, Tak, Uttaradit, Phitsanulok and Phetchabun. Minimum temperature 23-26 degrees Celsius. Maximum temperature 32-35 degrees Celsius. Southwesterly winds 5-15 km/hr.
• Northeastern – Fairly widespread thundershowers and isolated heavy rains in Loei, Nong Khai, Bueng Kan, Nong Bua Lamphu, Udon Thani, Sakon Nakhon, Nakhon Phanom, Kalasin, Mukdahan, Roi Et, Yasothon, Amnat Charoen, Nakhon Ratchasima and Buriram. Minimum temperature 24-25 degress Celsius. Maximum temperature 31-36 degrees Celsius. Southwesterly winds 10-20 km/hr.
• Central – Scattered thundershowers and isolated heavy rains in Kanchanaburi, Ratchaburi, Phra Nakhon Si Ayutthaya, Lopburi, Saraburi, Nakhon Pathom, Samut Songkhram and Samut Sakhon. Minimum temperature 25-27 degrees Celsius. Maximum temperature 35-36 degrees Celsius. Southwesterly winds 10-25 km./hr.
• Eastern – Fairly widespread thundershowers and isolated heavy rains in Nakhon Nayok, Prachinburi, Chachoengsao, Chonburi, Rayong, Chanthaburi and Trat. Minimum temperature 25-26 degrees Celsius. Maximum temperature 32-35 degrees Celsius. Southwesterly winds 15-30 km/hr. Wave height about 1 meter and above two meters high in thundershowers offshore.
• Southern (East Coast) – Scattered thundershowers and isolated heavy rains in Surat Thani, Nakhon Si Thammarat, Pattani, Yala, and Narathiwat. Minimum temperature 23-26 degrees Celsius. Maximum temperature 34-36 degrees Celsius. Southwesterly winds 15-30 km/hr. Wave height about one meter and above two meters high in thundershowers offshore.
• Southern (West Coast) – Fairly widespread thundershowers and isolated heavy rains in Ranong, Phang Nga, Phuket, Krabi and Trang. Minimum temperature 24-26 degrees Celsius. Maximum temperature 33-34 degrees Celsius. Southwesterly winds 15-30 km/hr. Wave height about one meter and above two meters high in thundershowers offshore.
• Bangkok Metropolitan – Fairly widespread thundershowers and isolated heavy rains mostly in the afternoon to evening. Minimum temperature 27-28 degrees Celsius. Maximum temperature 35-36 degrees Celsius. Southwesterly winds 10-25 km/hr.