 According to the United States Census Bureau, the borough has a total area of , of which, of it is land and 0.60% is water.Smethport is at high altitude, namely above sea level, and near Prospect Hill, the summit of which is the highest point in McKean County, rising above sea level .This climatic region is typified by large seasonal temperature differences, with warm to hot (and often humid) summers and cold (sometimes severely cold) winters.