Passive seismic techniques are increasingly being used to monitor complex environmental changes due to their high sensitivity and continuous sampling. However, their applications in ocean environment monitoring have not been widely explored, largely due to the absence of long-term seismic recordings at the seafloor, especially in deep ocean basins. In this study, we utilize ambient seismic noise recordings from the northwest Pacific Ocean basin, which has a depth of over 5,500 meters below the sea surface, and implement seismic monitoring of the near-seafloor medium over 1.5 years. Our observations and simulations illustrate a robust correlation between seismic response and the applied pressure on the seafloor. We analyze that the variation in pressure originates from atmospheric forces, which are associated with the regional wind field. The most important contribution of our study is to evaluate the seafloor seismic response to atmospheric forces. The ocean environment still includes complex unknown activities, and it is challenging to access them due to the limitations of current techniques. We hope that our study serves as a precursor that encourages the development of more advanced seismic techniques for monitoring the ocean environment.