it has nothing to do with the hemispheres, it depends on the shape of the drain. It can go either direction in both hemispheres

Tornadoes in the northern hemisphere rotate counterclockwise while those in the southern hemisphere rotate clockwise.

The gyres rotate counter clockwise in the southern hemisphere, and clockwise in the northern hemisphere.

Anticyclones in the northern hemisphere rotate clockwise while those in the southern hemisphere rotate counterclockwise.

Tropical storms in the northern hemisphere rotate counterclockwise while those in the Southern Hemisphere rotate clockwise.