Numerical hindcast of storm surge caused by the Typhoon Linda in the Gulf of Thailand is conducted by using the threedimensional ocean model (POM). In this case, the appropriate magnitude of drag coefficient depending on the wind speed is taken from the formula due to Matthias and Godfrey [16] which has been often used in storm surge models. It should be also noted that changes of bottom roughness parameter and bottom coefficient are checked not to influence the calculation of storm surge in this study. During the storm event, a northeasterly wind blew strongly over the southeastern coast of Thailand, which caused sea level elevation to rise in the northwestern part of Gulf of Thailand reaching a maximum value of 70 cm. Under the northeasterly wind, there is a contribution of sea water from the SCS into the Gulf of Thailand. A simulation has clearly revealed that the maximum sea elevation at the coast occurs not at the time of storm passage, but slightly after the storm strikes the coast. The wind forcing of a storm surge is the influential in controlling storm surges at a coastal region, whereas the initial value taken from the spin up phase is of minor importance. It is suitable to describe the storm from considerations presumed to hold at and near its center where the wind has the greatest effects.