In order to address the issue of wavelength selection in offshore visible light communication, this study analyzed the background light model and atmospheric turbulence channel model that impacted marine visible light communication. The key factors that influenced the quality of visible light communication were identified. Simulations of the visible light communication system under three different conditions were also conducted. These simulations provided insights into the correlation between the light source wavelength and the bit error rate. Specifically, the correlation was examined under varying communication distances, refractive index structure parameters, and field angles. The obtained results serve as a foundation for selecting the appropriate light source wavelength in offshore visible light communication.