The present study aims to investigate the survival and growth performance of eight mangrove and mangrove-associated species at different inundation frequency levels in the western coastal areas of Bangladesh. The study was conducted in the 3-12 months inundated land at Rangabali and Char Kukri-Mukri forest research station. Result showed that the species Thespesia populnea, Calophyllum inophyllum, Ficus rumphii, and Dolichandrone spathacea performed better survival and height growth in the 3-5 months of inundated areas at Rangabali in the years 2019 and 2020 significantly different from Char Kukri-Mukri site. But these species did not survive at 12 months and 9 months of inundated areas at Rangabali, except for D. spathacea in 2017 and 2018. On the other hand, the species Cynometra ramiflora, Aglaia cuculata, T. populnea, and D. spathacea performed better survival 60%, 52%, 50%, 47°o and better height performance were observed in T. populnea (0.80m) followed by A. cuculata (0.70m), D. spathacea (0.44m) and C. ramiflora (0.30m) at the 9—J2-month inundated area at Char Kukri-Mukri sites respectively. The present study found a significant inundation impact on the survival and growth of these eight mangrove and mangrove associates at the initial stage in western coastal areas. The species T. populnea, C. inophyllum, F. rumphii, and D. spathacea showed signs of growth that suggested it might be suitable for raising under the older keora forest in 3-5 months inundated areas, and A. cuculata and C. ramiflora species also showed signs of growth in 9-12 months inundated areas. The findings reveal that it would be appropriate for enhancing coastal vegetation to generate dense forests.