The question was inspired by an answer to this question on History SE, which referred to the "at times enormous waves" at the Cape of Good Hope in South Africa, and the even more "treacherous" passage around Cape Horn.
Why is the sea so hard to navigate at the southern extremities of the land masses.?Cape Horn, with a latitude in the high 50's, is easy to understand, but the Cape of Good Hope is in the 30s. Yet from what I understand, "navigability" does not extend far south of the Cape of Good Hope.
Is southern Australia and Tasmania (in the 40s latitudes) similarly hard to navigate? Would it be fore the same reasons?