Playa San Mateo is a beach located on the historic waterfront of Valparaíso, Chile, within the larger area of Playa Ancha. The beach is part of an ongoing urban development project aimed at recovering the natural coastline, which includes plans for new plazas, lookouts, and a dedicated parking zone. This indicates that vehicle access and parking facilities are intended to be available, though the exact current state may be subject to construction. The beach's character is defined by its urban setting on the Pacific Ocean, making it exposed to typical coastal winds and swell. The shoreline is a historic natural waterfront with wooded areas along the shore. Paddling activity is established here, as the beach is the location for the Centro Nautico Ganamar, which offers paid SUP clinics and provides all necessary equipment. This suggests the area is a recognized spot for stand-up paddleboarding, particularly for lessons and recreational paddling. The water body is the Pacific Ocean, so paddlers can expect open water conditions. The beach is situated between Playa San Mateo and the Quebrada Las Tortugas ravine, offering a stretch of coastline to explore. The aesthetic includes views of the city's hills and the historic port, with the project aiming to enhance the lookouts and natural wooded litoral.