Tropical storm Gaemi is expected to bring heavy rainfall and strong winds to eight provinces later on Saturday, according to the Meteorological Department.

As the storm prepared to make landfall in central Vietnam on Saturday afternoon, the agency forecast heavy rain and strong winds in Amnat Charoen, Ubon Ratchathani, Si Sa Ket, Suri, Buri Ram and Nakhon Ratchasima provinces in the northeastern region.

As well, it said, the two eastern provinces of Sa Kaeo and Prachin Buri would be affected. The central and lower northern parts of the country would be affected later, it added.

The department has also predicted precipitation in 60% of Bangkok area from later today to Monday with heavy rainfall in some parts of the capital.

The Gulf of Thailand and Andaman Sea will also see waves up to three meters high from Sunday to Tuesday, it added.

In the weekly televised programme on Saturday, Royol Chitradol, chairman of a flood monitoring panel under the Water and Flood Management Commission, did not rule out a possibility of more storms this year.

He said the current weather conditions in the South China Sea could bring more storms until later this month.

Tropical storm Gaemi, with winds of up to 74 kilometres per hour, has been bearing down on the Central Highlands of vietnam, threatening the country's coffee top coffee-growing region.

The storm, the seventh to hit Vietnam this year, was expected to weaken after making landfall and then move further west to Cambodia and Thailand, Vietnamese officials said.