Mokha, also spelled Mocha, or Mukha, is a port city on the Red Sea coast of Yemen. Until Aden and al Hudaydah eclipsed it in the 19th century…Mokha, also spelled Mocha, or Mukha, is a port city on the Red Sea coast of Yemen. Until Aden and al Hudaydah eclipsed it in the 19th century, Mokha was the principal port for Yemen's capital, Sanaa. Long known for its coffee trade, the city gave its name to Mocha coffee.