Abstract: Background and Objectives: More than 15 tourist projects occupy the Red Sea coast of the Sharm Abu-Makhadeg area (Makadai area) Red Sea, Egypt. During the 90's, landscape destruction, landfills, shoreline change, dredging rocky tidal flat and brine water discharge were the main environmental impacts in Abu-Makhadeg area. The scope of the present work were monitoring of changes of sediment nature by environmental impacts of Sharm Abu-Makhadeg area and record all developmental activities during the past 20 years. Materials and Methods: Grain size and geochemical analyses had been carried out on 32 surface marine sediment samples collected from Sharm Abu-Makhadeg area along the Egyptian Red Sea coast. Results: The sediments were characterized by the abundance of sand with minor amounts of mud and gravel. Generally, sand fraction is the main category among the three constituents. Geochemically, the factor controlling the carbonate content of studied sediments includes material supply of biogenic and terrigenous components. Organic matter recorded high values in some samples with increase depth. The high organic matter in surface marine sediments is primarily due to the high supply from primary productivity, terrestrial and reworked sediments. Texture was the main controlling factor for the organic matter enrichment. Conclusion: Grain size distribution and geochemical aspects of surface marine sediments of Sharm Abu-Makhadeg area using some statistical methods revealed the dominance of muddy sediments of most samples with high values of organic matter than background areas reflected the negative impact of the biogenic life and humans.