Samborombón Bay

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Samborombón Bay
Bahía de Samborombón
Rio de la Plata NASA image.jpg
Visible as a C-shaped indentation in the coast near the southern end of the Río de la Plata estuary
Location South America
Coordinates 35°54′S 57°05′W / 35.900°S 57.083°W / -35.900; -57.083 (Samborombón Bay)Coordinates: 35°54′S 57°05′W / 35.900°S 57.083°W / -35.900; -57.083 (Samborombón Bay)
River sources Salado River, Samborombón River
Ocean/sea sources Argentine Sea, South Atlantic Ocean
Basin countries Argentina
Max. width 135 km (84 mi)
Settlements San Clemente del Tuyú

Samborombón Bay (Spanish: Bahía de Samborombón[1]) is a bay on the coast of Buenos Aires Province, Argentina. Located at the Río de la Plata's mouth on the Argentine Sea, it begins about 160 kilometres (99 mi) southeast of Buenos Aires and is about 135 kilometres (84 mi) wide.[2]


The bay was named in 1520 by members of Ferdinand Magellan's expedition, who attributed its nearly semicircular shape to the detachment of legendary Saint Brendan's Island from the South American mainland ("Samborombón" being a corruption of San Borondón).[3] The Samborombón River and the town of Samborombón are named after the bay.


Samborombón Bay is located at the mouth of the Río de la Plata, stretching from Punta Piedras in the north to Punta Rasa in the south, where Cape San Antonio begins. Depending on the boundaries used, the bay can be considered an estuary stretch of the Río de la Plata or a large bay of the Argentine Sea; the International Hydrographic Organization defines the eastern boundary of the Río de la Plata as "a line joining Punta del Este, Uruguay and Cabo San Antonio, Argentina,"[4] a definition which includes Samborombón Bay as part of the river.


The bay receives inflow from the Southern Salado River, the Samborombón River, and other smaller streams, as well as numerous artificial canals constructed to drain eastern Buenos Aires Province. It also experiences a substantial flow of water coming out from the Río de la Plata into the Argentine Sea.[5]


Samborombón Bay and the adjoining coastal region are included in a number of protected areas because of the well preserved Pampas grassland and wetland ecosystems that characterize the area.[6] The Province of Buenos Aires' Provincial Body for Sustainable Development has designated the area as the Samborombón Bay Nature Reserve because of its importance as a wildlife refuge.[7] The bay is also designated as a Western Hemisphere Shorebird Reserve Network Site of International Importance, as well as a Ramsar Wetland of International Importance, reflecting its significance as a habitat for the buff-breasted sandpiper and other threatened species.[8] The southern shore includes Campos del Tuyú National Park, home to a population of rare Pampas deer.


  1. ^ Bahía Samborombón at GEOnet Names Server
  2. ^ "Samborombón Bay". Encyclopædia Britannica. Retrieved 25 May 2017. 
  3. ^ Haase, Wolfgang; Reinhold, Meyer (1994). The Classical Tradition and the Americas: European Images of the Americas and the Classical Tradition. Walter de Gruyter. p. 200. ISBN 978-3-11-011572-7. Retrieved 28 May 2017. 
  4. ^ "Limits of Oceans and Seas, 3rd edition" (PDF). International Hydrographic Organization. 1953. Retrieved 7 February 2010. 
  5. ^ Perillo, Gerardo M.E.; Piccolo, Maria C.; Pino-Quivira, Mario (2012). Estuaries of South America: Their Geomorphology and Dynamics. Springer Science & Business Media. pp. 170–1. ISBN 9783642601316. Retrieved 25 May 2017. 
  6. ^ "Samborombon Bay". Birding Buenos Aires. Retrieved 25 May 2017. 
  7. ^ "Reserva Natural Bahía Samborombón". Organismo Provincial para el Desarrollo Sostenible (in Spanish). Retrieved 28 May 2017. 
  8. ^ "Bahía Samborombón". Western Hemisphere Shorebird Reserve Network. Retrieved 25 May 2017.