A portable bow thruster for use on the bow of a boat in a body of water having a water line. The bow thruster includes a blower assembly for producing an air flow to provide thrust, an exhaust air duct for expelling the air flow from the blower assembly, pivoting means for pivoting the bow thruster in the clockwise and counterclockwise directions, support means for supporting the blower assembly, and a mounting assembly for mounting the bow thruster to the bow of the boat.