As developing countries grapple with the consequences of increasing population growth, industrialisation, and climate change, the over-extraction of groundwater has become a critical issue. In response, this research was conducted using geophysical techniques to assess the vertical and lateral extent of saline intrusion into the coastal freshwater aquifers of Cape Coast, Ghana. Utilising the Mangusta System MC 24/120E and a multifunctional digital resistivity/IP meter, 15 Electrical Resistivity Tomography (ERT) and 14 Vertical Electrical Sounding (VES) surveys were carried out along the southeast-northwest direction of the coastline. The ERT survey had profile lengths between 120 and 240 m and a 5 m dipole-dipole spacing interval, and the VES survey had Schlumberger configurations extending 50-80 m. The classification of salinity level proves three resistivity zones exist: low resistivity (≤ 10 Ω·m) interpreted as saline water; moderate resistivity (10 Ω·m < x > 20 Ω·m) suggested as brackish water and high resistivity (≥ 20 Ω·m) interpreted as freshwater aquifer zone. The research findings indicate that the shallow aquifer zones are compromised by seawater intrusion at 4.25 km away from the shoreline. This is further corroborated by the geo-chemical analysis of groundwater samples, which shows a decreasing trend of salinity moving inland from the coastline. GIS maps interpolated for water parameters (EC, TDS, Cl & Na) indicate decreasing trends in saline intrusion inland from the shoreline. The study’s visuals, including 2D/3D pseudo-sections of ERT, 3D block model, 2D cross-section, & 1D resistivity model (VES), charts, and interpolated maps of groundwater sample parameters, provide a clear implication of these significant findings to the affected areas. In conclusion, integrated and sustainable water resources management strategies were adopted as the implementation model to combat global efforts to address water scarcity. These include exploring alternative water sources such as desalination and recycled water, which offer viable solutions to freshwater scarcity.