7 Day Weather Forecast September 21, 2020 - September 27, 2020 During 21 - 22 Sep, the monsoon trough line across the North and the upper Northeast to low pressure cell in the South China Sea. The weak southwest monsoon prevails over the Andaman Sea,Thailand and the Gulf. Less rain over Thailand. The weak strong wind and waves are in the Andaman Sea and the Gulf of Thailand. During 23 - 27 Sep, the monsoon trough line across the North and the Northeast to low pressure cell in the South China Sea. The southwest monsoon prevails over the Andaman Sea,Thailand and the Gulf will strengthen while the southeasterly winds prevail over the Gulf, the East and the Northeast. More rain over Thailand and isolated heavy rain. The strong wind and waves are in the Andaman Sea and the Gulf of Thailand will strengthen, about 2 merters height in the Andaman Sea, above 2 meters in thundershower areas and 1-2 merters height in the Gulf,about 2 meters in thundershower areas....more Issued Date September 21, 2020