Authorities have warned people to be aware of the possibility of flooding and landslides in the next couple of days.
At sea, wave are likely to reach heights of two metres, so small boats are urged to stay on shore until next Monday (September 30).
The bad weather is connected to two major storms in the region. Supertyphoon Jelawat, packing winds gusting up to 295 kilometres an hour, is to the east of the Philippines, moving northward and expected to hit Taiwan at the weekend.
Tropical storm Ewiniar, currently heading northeast along the coast of Japan, is less malevolent, generating winds around 85 kmh. Neither is expected to visit Thailand.