In the 18th century, the sand bars of the Guadalquivir forced the Spanish government to transfer its American trade from Seville to Cádiz, which now commanded better access to the Atlantic.
V bitki za Cádiz leta 1702 je Anglija spet napadla pod vodstvom Georga Rooka in vojvode Ormonda, vendar je bilo mesto, po dolgem obleganju, ubranjeno.