In the fields of coastal engineering, ensuring the stability of port structures is paramount, particularly in regions with dynamic marine environments such as South Sukabumi, West Java. This study investigates the stability of sheet piles in one of the port structures, emphasizing sustainable design practices by exploring the use of woven geotextile with varying strengths under the breakwater structure ranging from 100–600 kN/m and modifying the armor layer section lengths to 15 m, 9 m, and 6 m. The simulation model is analyzed using a geotechnical finite element analysis software, and the best alternative is assessed by comparing the Factor of Safety (FS) of the alternatives proposed. The simulation concludes that the toe and geotextile length of 15 m yields the highest FS. These findings not only highlight the effectiveness of geotextile reinforcement in enhancing structural integrity but also promote environmental responsibility and resource conservation by minimizing the need for frequent repairs and invasive construction methods, ultimately putting the carbon footprint on the decline.