In this study, direct contact membrane distillation (DCMD) technology was proposed to produce freshwater by utilizing the low-grade waste heat from the gases purged from the absorber of a CO₂ capture unit. A Rate-based model has been used to simulate a monoethanolamine (MEA)-based CO₂ capture process in Aspen Plus® V.10, and DCMD unit was simulated with the MATLAB software. The regeneration energy requirement in the CO₂ capture process and freshwater production in DCMD unit were analyzed by varying the operating parameters. Cold seawater and purged gas were allowed to pass through the additional heat exchanger; as a result, the temperature of seawater increased. Then the warmed seawater was injected into the DCMD unit to produce freshwater. The freshwater production was 88,599 L/day at the feed temperature of 52.2 °C, which reduced to 85,050 L/day when the feed temperature declined to 50.3 °C. The freshwater production was 88,950 L/day at the permeate temperature of 10 °C, which declined to 78,450 L/day when the permeate temperature increased to 20 °C. Since adequate amount of freshwater was produced by the proposed system, the proposed integration method could help to mitigate environmental pollution and freshwater crises.