There is a growing demand of electrical energy in South African due to the increasing use in domestic, commercial and industrial sector. The country produces most of its electricity from the use of coal while the environmental issues are debated by researchers, journalists, industrialists and politicians all over the world in order to fight against the global warming and climate change. The study focuses on the design of a system generating electricity from Agulhas Current in Indian Ocean along South-Africa coastline by a sustainable and reliable energy supply. To achieve this objective, the design and construction of a hydrokinetic horizontal axis turbine are demonstrated and explained in this paper. Knowing the average velocity of the water current, the depth and other properties of different sites, the power generated is estimated using standard formula. In this paper we will assume the blade length for a turbine diameter selected for low Reynolds’s number (low velocity) to design a proper turbine running for the sites where the speed has been measured and considered as possible sites for implantation of a system generating electricity. With the blade length according to Betz or Schmitz approaches, we determine the blade profiles which are the twist angles and chord lengths at different selected sections along the blade. We compare different air foils running under low wind velocity and adapt their profiles to evaluate the power output under deep ocean current condition. Making reasonable assumption for the efficiency of the turbine, generator and transmission, the power output has been estimated.