Bartolomeu Dias (1451 – 29 May 1500), a nobleman of the Portuguese royal household, was a Portuguese explorer. He sailed around the southernmost tip of Africa in 1488, reaching the Indian Ocean from the Atlantic, the first European known to have done so.

His expedition sailed south along the west coast of Africa. Extra provisions were picked up on the way at the Portuguese fortress of São Jorge de Mina on the Gold Coast. After having sailed past Angola, Dias reached the Golfo da Conceicão (Walvis Bay) by December. Continuing south, he discovered first Angra dos Ilheus, being hit, then, by a violent storm. Thirteen days later, from the open ocean, he searched the coast again to the east, discovering and using the westerlies winds - the ocean gyre, but finding just ocean. Having rounded the Cape of Good Hope at a considerable distance to the west and southwest, he turned towards the east, and taking advantage of the winds of Antarctica that blow strongly in the South Atlantic, he sailed northeast.

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