The official currency in Gansbaai, as in the rest of South Africa, is the South African Rand (ZAR). It is commonly used for all transactions. Some stores accept major international credit and debit cards, but it is advisable to always carry a few rand for smaller stores or street vendors. Some stores that cater to tourists may accept U.S. dollars or euros, but this is not the norm and the exchange rate may not be in your favor.