a peninsula (=a piece of land surrounded on three sides by water) at the southwestern end of South Africa, where the Atlantic Ocean meets the Indian Ocean. Rocky promontory, southwestern coast, Western Cape province, South Africa. It was sighted by the Portuguese navigator Bartolemeu Dias in 1488 on his return voyage to Portugal after finding the southern limits of the African continent. Known for the stormy weather and rough seas encountered there, the cape lies at the convergence of warm currents from the Indian Ocean and cool currents from Antarctic waters. A part of the Cape of Good Hope Nature Reserve established in 1939, the cape was the site of the first Dutch settlement at Table Bay in 1652