Oyo River

The Oyo River is a river in southern Central Java and Yogyakarta, in the central south area of Java island, Indonesia.[1] It is a tributary of the Opak River.

Oyo River
Sungai Oyo, Kali Oyo, Kali Ojo, Sungai Oya, Kali Oja
Location of river mouth
Oyo River (Indonesia)
RegionBantul Regency, Wonogiri Regency
Physical characteristics
  locationWonogiri Regency
MouthOpak River
Bantul Regency
7.95583°S 110.36583°E / -7.95583; 110.36583

It was the river on which the historical palaces of Mataram were located - Sultan Agung's Karta palace, and his son's Plered palace.


The river flows in the southwest area of Java with predominantly tropical monsoon climate (designated as Am in the Köppen-Geiger climate classification).[2] The annual average temperature in the area is 23 °C. The warmest month is October, when the average temperature is around 24 °C, and the coldest is January, at 22 °C.[3] The average annual rainfall is 2970 mm. The wettest month is January, with an average of 537 mm rainfall, and the driest is September, with 22 mm rainfall.[4]

See also


  1. Kali Oyo at Geonames.org (cc-by); Last updated 2013-06-04; Database dump downloaded 2015-11-27
  2. Peel, M C; Finlayson, B L; McMahon, T A (2007). "Updated world map of the Köppen-Geiger climate classification". Hydrology and Earth System Sciences. 11: 1633–1644. doi:10.5194/hess-11-1633-2007. Retrieved 30 January 2016.
  3. "NASA Earth Observations Data Set Index". NASA. 30 January 2016.
  4. "NASA Earth Observations: Rainfall (1 month - TRMM)". NASA/Tropical Rainfall Monitoring Mission. 30 January 2016.
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