why does water swirl counterclockwise?
<answer> It all depends upon how the water was introduced and the geometric structure of the drain and Coriolis force affects the flow of water down the drain in sinks, bathtubs, or toilet bowls. <context> Does water go down the drain counterclockwise in the northern hemisphere and clockwise in the southern hemisphere? It all depends upon how the water was introduced and the geometric structure of the drain. One can find both counterclockwise and clockwise flowing drains in both hemispheres. Some people would like you to believe that the Coriolis force affects the flow of water down the drain in sinks, bathtubs, or toilet bowls.