Heavy rain in most of the country is expected to continue into Thursday, with strong storm winds forecast to whip up waves in the upper Andaman Sea and the Gulf of Thailand.
The Meteorological Department said on Wednesday that a strong monsoon trough lies across the North into a lower-pressure area over the Northeast of Thailand. The strong southwest monsoon prevails over the Andaman Sea and the Gulf of Thailand.
Heavy to very heavy rain is expected in the North, the Northeast, the Central Plains including Bangkok and its vicinity, the East and the South.
The department said strong waves in the Andaman Sea are likely to be 2-4 metres high and more than 4 metres during thundershowers.
All boats should be proceed with caution, while small boats should stay ashore until Thursday.
In Nakhon Si Thammarat, a total of 343 houses were damaged when strong storms hit on Tuesday.