The annual average long-term solar potential on a horizontal surface in Bahrain was found to be 408 Wn(-2) The annual mean daily wind power density is 662 Wm(-2). Tidal power is at a maximum in September and March and reaches 0.339 and 0.340 Wm(-2) respectively. The water current power in Bahrain was estimated to be nearly 552 Wm(-2). This paper highlights the advantages and the disadvantages of adopting each type of such renewable technology.