Coastal areas became the center of social and economic activities. Following the 1964 construction of the Aswan High Dam, which retained sediments upstream of the river, erosion rates at Rosetta Promontory have increased. Studying the nearshore is crucial in areas where accretion and erosion affect the coastline. More circulation and rip currents result from the need for protective structures, such as groins and detached breakwaters, caused by erosion and accretion. In addition to observing the hazard rate (HR) of swimming at various water depths due to sea current velocity, this study also aims to monitor the speed, direction, and patterns of sea currents. The numerical model Delft-3D was used to simulate the currents generated by the eight groins. Three hard structure scenarios were investigated. Among these scenarios were the use of detached breakwaters and groins. The best scenario is scenario (1) with the smallest value of velocity and the HR along the area studied. The (HR) for the first scenario is up to 2.2 m/s2 in the upstream and between 1.3 and 1.7 m/s2 in the downstream direction. This rate works well for the majority of swimming age groups. All scenarios yield similar results, solve the problem, and reduce the hazard rate quickly in the downstream direction.