Glass-polyester composites have promising application in the maritime domain, especially in the offshore energy industries due to their low cost, high strength-to-weight and stiffness-to-weight ratios, and corrosion resistance. Tidal turbines propose a new opportunity to use these materials to exploit ocean current flows to generate energy at locations with catastrophic loading. This investigation focuses on the Hygrothermal and mechanical performance evaluation of glass-polyester for renewable marine energy applications. The optimal design and the dynamic behavior of the turbine are studied. The hygrothermal effect and the hydrodynamic and hydrostatic pressures over the loading and the distribution of the stress, the deformation, and damaged zone under are presented.