This study assesses the distribution and ecological risk of potentially toxic elements (PTEs: Cd, As, Pb, Cu, Ni, Cr, Zn, Ag) in ten surface marine sediments along the western Moroccan Mediterranean coast (Fnideq–Azla). The results demonstrate that PTE transport and accumulation are mainly driven by continental inputs, marine hydrodynamics, and coastal morphology. Oued Martil represents the main contamination source, pollutants are transported northwestward by longshore drift and subsequently trapped by the Cabo Negro and Ceuta headlands, creating distinct accumulation zones. While the geo-accumulation index (Igeo) shows varying enrichment levels, ranging from uncontaminated (Cr, Cu) to severe (Cd at Oued Martil), the Pollution load index (PLI: 1.19–2.70) indicates widespread anthropogenic impact across the region. Martil is the main pollution hotspot, followed by Fnideq, Cabo Negro, and Azla. The M'diq fishing harbor shows moderate impact, whereas the adjacent M'diq coastline and Restinga remain the least affected. Ecological risk assessment (PERI) highlights very high risk near Oued Martil and considerable risk in the northern sectors of coastal headlands. The total toxic unit (ΣTU) exceeded 3 at most sites, with Ni contributing the highest toxic load. The biological risk index (BRI: 0.17–0.42) reflects moderate risk corresponding to an 11–30 % probability of adverse effects occurring on benthic communities. Except at M'diq and Restinga, PTE levels exceeded the American National Oceanic and Atmospheric Administration (NOAA) safe thresholds. Our results surpass previous regional reports, marking this area as a critical hotspot with escalating contamination patterns.