The intricate relationship between groundwater and surface water has garnered significant attention due to the formidable challenges in model validation and calibration. These challenges mainly stem from the dynamic exchange at the soil–water interface, which becomes more intricate at smaller scales, posing significant obstacles for researchers. However, as investigations extend to larger scales, the complexity of these interactions intensifies, reaching unprecedented levels. To gain a deeper understanding of this critical coupling, it is essential to develop robust numerical models capable of accurate simulations. This comprehensive review explores two prominent coupling strategies within detailed domain models: the “fully-coupled” and “loosely-coupled” techniques, which are cornerstones of contemporary groundwater modeling efforts. Through careful analysis, we highlight the unique advantages and inherent limitations of each modeling approach. This review provides invaluable guidance for both researchers and practitioners alike, offering strategic insights for the development of groundwater flow models. It serves as a comprehensive resource, aiding in the formulation of effective strategies and considerations crucial for model crafting. By synthesizing key findings and methodologies, it empowers professionals to make informed decisions in their modeling endeavors. The ultimate goal is to develop models that accurately capture the complexities of real-world conditions governing surface and groundwater interactions, particularly at regional scales. By exploring the intricate landscape of coupling strategies, we pave the way for improved insights and more precise simulations in the field of groundwater dynamics.