The tropical-cyclone-generated currents for the severest 41 events in the Gulf of Tonkin (Beibu Gulf) during 1949-1987 were numerically hindcasted by using Liu and Leendertse's (1978) finite-difference model. The hindcasted storm surges agreed satisfactorily with the observed values. To meet the need of engineering design an extreme value analysis was carried out to obtain extreme current speeds corresponding to various return periods. An analysis of the current field generated by the typhoon No.8303(Vera, 1983) is also reported in the present paper.