.Lowwittayakorn (1998) studied the circulation pattern, temperature distribution and salinity of the sea surface in the Gulf of Thailand using a mathematical model and data from oceanographic buoys. The results of study showed that during the SW monsoon, the current entered the gulf from the western side, made a clockwise circulation, and left the gulf through the eastern side. During NE monsoon, the current entered the gulf from the eastern side, made a counterclockwise circulation and left the gulf through the west.