And here is a short home video i took a while back. Cape Town Peguins Yes the water is cold but not unswimable. Also in summer the bay warms up nicely. As for the debate about where the Indian Ocean starts … Its where the warm current coming down from the tropics on the east side of Africa meets the cold current coming from Antarctica and flowing up the west coast of Africa meets … This around Cape Agulhas and not Cape Point. The water to the East of Cape Point is warmer than the west (or Atlantic) because it heats up a little in False Bay.