The effects of the course of typhoon on the design wave height are amined at two locations in the Osaka bay. The existing data ofe the ind-casted wave height are utilized. At Nada offshore near the bhay ead, the 50 years design wave height generated by the typhoons proceeding westside of the bay is larger than that by thpe typhoons oceeding eastside. At Kashii river offshore along the eapsrt coast, the esign wave height by those proceeding eastside is larger than that by those proceeding westside. This is opposite to predicted from the wind elocity difference between east and west halves of typhoon.
