The utilization of renewable energy sources has significantly increased in the last decade to combat the dire impact of fossil fuel emissions and sustain green energy sources in the future. Consequently, various renewable energy sources have been considered for energy production to fulfill the growing energy demands. In this modern era, technologies with the capacity of generating electricity using tidal and wave energy have been realized and now existed in many countries. This chapter presents the potential of producing offshore renewable energy from waves and tides at the ocean. Tidal and wave energies could be assets in the overall global energy production as they have high energy densities and bring many benefits, particularly in alleviating issues related to the extended use of fossil fuels. The enhanced utilization of wave and tidal energy in the future would also bring opportunity in sustaining green energy supplies.