
The weather conditions are due to the presence of a weak high-pressure system, or a cold air mass covering the upper northern and northeastern regions of Thailand. Easterly winds continue to affect most of Thailand, meanwhile, leading to the possibility of scattered thunderstorms and more rain for the southern region.
Waves in the Gulf of Thailand and the Andaman Sea are relatively weak, with waves lower than 1 metre and 1-2 metres in thunderstorm areas. Nonetheless, small vessels are advised to navigate with caution.