An ocean current is a continuous, directed movement of seawater generated by the forces acting upon it. UNDERTOW is an ocean current that flows beneath the surface of the water and is caused by waves breaking on the shore. TIDE is an ocean current that is caused by the gravitational pull of the moon and sun. DRIFT is an ocean current that is created by wind and is usually slower than other currents. El Nino is an ocean current that is caused by a warming of the surface waters in the Pacific Ocean. Neap TIDE is an ocean current that occurs when the gravitational pull of the moon and sun are at their weakest.