Ocean wave is one of the potential renewable energy sources that can prospectively be developed into Wave Power Plant. Our study aims to analyze the feasibility of sea wave power plant in the area Sibolga-Tapanuli Tengah which most of the area is ocean and directly adjacent to the Indian Ocean. Water Colum oscillating system (OWC) and Ocean Surface Wave (OSW) are both two methods of converting ocean wave energy into electrical energy. Based on our analysis, the waves with a height of 0.1 to 0.75 meters can generate electricity with minimum P-density = 11.26 Watt / m 2 and a maximum P-density = 213, 18 Watt / m2. Furthermore, we found the largest output from each unit was able to be raised by using the method of Ocean Surface Wave (OSW) with Pout = 464.31 Kilowatt (Tapered Channel system) and Pout = 128.8 Kilowatt (Power Buoy system). In other hands, by using oscillating Water Colum (OWC) method, it was found that Pout = 54.65 Kilowatts. This result emphasized that the physical condition of the coastal marine area of Sibolga are appropriate for Sea Wave Power Plant Power systems by applying Tapered Channel system for optimization.