It will be particularly cold on the mountaintops with morning frost and temperatures from 1-8°C. The Central region including Bangkok and its vicinity, and the East region, will also experience cold weather with minimum temperatures ranging from 12-19 degrees Celsius. 
Meanwhile, the stronger northeast monsoon will continue to whip up waves in the southern Gulf, reaching 2-3 metres high from Chumphon northward and 2-4 metres from Surat Thani southward.

Tidal surges along the eastern coast of South Thailand are likely. Ships should proceed with caution, and small boats should stay ashore. 
Bangkok and the vicinity will experience Northeasterly winds of 15-35 km/hr

Strong winds and cold weather in most parts of Thailand

The strong high-pressure trough over Thailand continues to bring cool to cold weather with strong winds over the upper part of the country with further drops in temperatures of 1-3°C. It will be cold to very cold in the North and Northeast with minimums ranging from 6-14°C.