Since 1970, the Ports and Harbours Bureau, Ministry of Land, Infrastructure, Transport and Tourism and its associated organizations have been conducting the Nationwide Ocean Wave information network for Ports and HArbourS (NOWPHAS). Among these organizaions, the Port and Airport Research Institute(PARI) is playing an important role to process and analyze the wave records obtained at the network, and to present the wave statistics in a series of annual reports. This Technical Note of PARI covers the wave data obtained throughout the year 2013 at the 76 network stations (25 stations on the coast of the Sea of Japan, 4 stations on the East China Sea, 1 station on the Sea of Okhotsk, and 46 stations on the Pacific Ocean). Sixteen GPS buoys, which can measure the vertical motion of the mooring buoys due to sea surface elevations every one second by using the RTK-GPS technolgy, are included at the stations on the coast of the Pacific Ocean. Among these 76 stations, the significant wave is obtained every 20 minutes at 70 stations and every 2 hours at 6 stations. This note presents the statistics on the frequency spectrum analysis at 51 stations. In 2013, the record of the local highest significant wave at 11 wave observation stations were updated.