Laguna Cahuil (Cahuil)

Laguna Cahuil (Cahuil) is a mixed-water lagoon/estuary setup south of Pichilemu where wind sports are commonly done in calmer, shallow lagoon conditions, while the river mouth can bring more surf-like options when the sandbar configuration suits the swell. Wind is described as favoring south and southwest directions (including N, S, SSW, SW in the spot notes) and is strongly associated with an afternoon thermal pattern locally known as the Surazo. Reports indicate it typically builds starting around 1:00 PM and can last until sunset, with summer months characterized as more reliable and often steady in roughly the 15–25 knot range. Kitesurfing is highlighted for flatter-water riding suitable for freestyle progression and learning, while wave riding potential can appear at the mouth depending on conditions. Windsurfing is also described as strong in the lagoon for freeride and slalom, with wave sailing tied to the river mouth on the right swell; wingfoiling is noted as popular for learning, with attention needed for variable shallow depth. For surfing, Cahuil is described as a river-mouth break producing both lefts and rights depending on sandbar alignment. Southern swells are referenced as the most favorable, and the working swell window is given as about 1.0–2.5 m with peeling, medium-length rides; however, on very large swells the break can close out or become turbulent. Safety-wise, conditions are managed by an irregular inlet/mouth dynamic linked to river flow and rainfall, and hazards near the lagoon/oyster structures include bridge pillars and power lines. Water quality can vary with eutrophication and harmful algal bloom risk, and riders are advised to avoid kiting/surfing too close to salt pans and oyster farming areas.