In this study, a numerical analysis has been done to investigate the thermo-hydraulic and structural performance of water-lubricated journal bearing for marine applications. Essential parameters such as water film pressure distribution, temperature profiles, and bearing wall pressures are measured for eccentricity ratios ranging from 0.01 to 0.03. The Zwart-Gerber-Belamri cavitation model anticipates cavitation inside the bearing clearance at 500 rpm. A static structural analysis establishes the Babbitt material’s maximum deformation and primary stress under operational conditions at 500 RPM. The findings show that increasing eccentricity ratios substantially impact hydrodynamic performance and structural integrity, highlighting the necessity of optimized designs in maritime applications to improve reliability and efficiency. At higher eccentricity, a maximum principal stress of 23.028 MPa and a maximum deformation of 0.31468 mm is found. Similarly, a maximum Nusselt number of 23.77 is found at a 0.01 eccentricity ratio with a maximum skin friction coefficient of 508.66 at a maximum eccentricity ratio of 0.03.