Overview
- The Dirección de Hidrografía y Navegación (Dihidronav) warned that low‑intensity anomalous waves will affect the whole Peruvian coast from Sunday, 15 November through Wednesday, 18 November.
- The advisory gives sector timing: the north coast (Tumbes to Salaverry) began seeing light westerly/northwesterly waves on the morning of 15 November, the central coast will experience waves from the afternoon of 15 November, and the south coast (south of San Juan de Marcona to Tacna) is expected to start on the morning of 16 November.
- Beaches that are open or semi-open and face northwest or west are the most exposed and may see stronger local wave impacts than sheltered bays.
- Dihidronav urged regional and local governments, port authorities, fishing and maritime companies, and coastal residents to adopt preventive measures to avoid accidents and damage to people, vessels and shore infrastructure.
- The agency links the event to sea levels above normal from persistent warming of the water mass and to tidal effects tied to the lunar phase, factors that could disrupt navigation, small‑boat fishing, port operations and recreational beach use during the advisory period.