The northeast monsoon prevailing over the Gulf, the South and the Andaman Sea is strengthening with more rains and isolated heavy to very heavy rains in the lower South.The rather strong wind force the waves in the lower Gulf are expected 2-3 meters high and above 3 meters high in thundershowers. In the upper Gulf, the waves are expected about 2 meters high and above 2 meters high in thundershowers. The rather strong high-pressure system from China extends to upper Thailand with a decrease in temperature and strong wind in the upper country.