Buitendag was born in
Cape Town, Western Cape,
Western Cape,
South Africa on 9 November 1993. She grew up near the beach of
False Bay outside of
Cape Town. With her father's encouragement she learned to surf at the age of eight with her two brothers. When she was twelve her family moved to the Southern Cape region of South Africa. Bianca only spoke
Afrikaans when she first went to school, so her parents decided to put her in an English school. In 2015 her father, Collin Buitendag, died. She was still able to finish at her career-best at World No. 4. The following year she was ranked No 12 in the world. ==Surfing career highlights==