Wave energy is a promising renewable energy source with vast reserves, but it is challenging to harvest because of its low frequency and random nature. Triboelectric nanogenerators are an emerging technology that efficiently generates energy from different forms of mechanical excitation, including wave excitation. In this work, an accelerator-based triboelectric nanogenerator (A-TENG) is proposed for wave energy harvesting. A-TENG is based on the contact-separation principle and comprises two layers: a copper electrode and fluorinated ethylene propylene film in the bottom and a flexible copper electrode in the upper layer. The bendable upper layer is inspired by the accelerator structure, whereby it fully contacts the bottom layer upon applying a force to the upper layer. A detailed summary of A-TENG and its potential applications for energy harvesting are discussed. A-TENG is a simple, low-cost solution that can yield higher output with an array network. The A-TENG is proposed to be mounted to shoreline structures like seawalls for energy generation from surface waves. Moreover, water-resistant A-TENGs can be installed on the seabed to generate energy from underwater pressure variations. This unique solution shows promise for efficiently harvesting wave energy, e.g. for powering electronics.