The study investigated how suspended sediment concentration (SSC) and environmental factors relate in the coastal waters of Lhok Paroy in Aceh Besar, Indonesia. Samples were taken from ten sampling locations at high and low tide. SSC varied from 150 mg/l to 220 mg/l when the tides went out and had a similar range of 110 mg/l to 220 mg/l when it came in. Higher SSC were found near the mouth of the river as well as in areas of high human activity. The other environmental variables also had considerable variability that was dependent on tidal phase as well as location. Luminosity ranged from 4.6 m to 8.9 m; salinity ranged from 28 ppt to 31 ppt; temperature ranged from 30 °C to 33 °C; dissolved oxygen (DO) ranged from 5.5 mg/l to 11 mg/l; and pH ranged from 6.5 to 7.9. Through Principal Component Analysis (PCA), PCA identified the strongest relationships between SSC and pH (Station 2) and SSC and temperature (Stations 3 and 4). And, negative correlations were also found between SSC and DO, and SSC and luminosity. As a result, the amount, or concentration of SSC is affected by tidal hydrodynamics, sediment resuspension and mineral interactions. The work provides insight into the complex interaction between physicochemical factors that impact water quality in tropical coastal ecosystems and helps form a scientific basis for future sediment management and environmental monitoring plans for the Lhok Paroy area.