Singapore Strait
Map of the Singapore Strait below Singapore
Map of the Singapore Strait
Coordinates1°13′N 103°55′E / 01.22°N 103.92°E / 01.22; 103.92
Basin countriesSingapore
Max. length114 km (71 mi)
Min. width16 km (9.9 mi)
Average depth22 m (72 ft) (minimum, within the nautical channel)[1]
The Singapore Strait, as seen from East Coast Park
The Singapore Strait, as seen from Marina Bay Sands

The Singapore Strait is a 113 km-long (70 mi), 19 km-wide (12 mi)[2] strait between the Strait of Malacca in the west and the South China Sea in the east. Singapore is on the north of the channel, and the Indonesian Riau Islands are on the south. The two countries share a maritime border along the strait.

It includes Keppel Harbour and many small islands. The strait provides the deepwater passage to the Port of Singapore, which makes it very busy. Approximately 2,000 merchant ships traverse the waters on a daily basis in 2017.[3] The depth of the Singapore Strait limits the maximum draft of vessels going through the Straits of Malacca, and the Malaccamax ship class.

Historical records

Aerial panorama of the Singapore Strait and the Pasir Panjang Port Terminal, 2016
Aerial perspective of Kusu Island, one of the southern islands found in the Singapore Straits, 2016

The 9th century AD Muslim author Ya'qubi referred a Bahr Salahit or Sea of Salahit (from the Malay selat meaning strait), one of the Seven Seas to be traversed to reach China. Some have interpreted Sea of Salahit as referring to Singapore,[4] although others generally considered it the Malacca Strait, a point of contact between the Arabs and the Zābaj (likely Sumatra).[5] Among early Europeans travellers to South East Asia, the Strait of Singapore may refer to the whole or the southern portion of the Strait of Malacca as well as other stretches of water.[6] Historians also used the term in plural, "Singapore Straits", to refer to three or four different straits found in recorded in old texts and maps – the Old Strait of Singapore between Sentosa and Telok Blangah, the New Strait of Singapore southwest of Sentosa, the "Governor's Strait" or "Strait of John de Silva" which corresponds to Phillip Channel, and the Tebrau Strait.[7] Today the Singapore Strait refers to the main channel of waterway south of Singapore where the international border between Singapore and Indonesia is located.


The International Hydrographic Organization defines the limits of the Singapore Strait as follows:[8]

On the West. The Eastern limit of Malacca Strait [A line joining Tanjong Piai (Bulus), the Southern extremity of the Malay Peninsula (1°16′N 103°31′E / 1.267°N 103.517°E / 1.267; 103.517 (W1)) and The Brothers (1°11.5′N 103°21′E / 1.1917°N 103.350°E / 1.1917; 103.350 (W2)) and thence to Klein Karimoen (1°10′N 103°23.5′E / 1.167°N 103.3917°E / 1.167; 103.3917 (W3))].

On the East. A line joining Tanjong Datok, the Southeast point of Johore (1°22′N 104°17′E / 1.367°N 104.283°E / 1.367; 104.283 (E1)) through Horsburgh Reef to Pulo Koka, the Northeastern extreme of Bintan Island (1°13.5′N 104°35′E / 1.2250°N 104.583°E / 1.2250; 104.583 (E2)).

On the North. The Southern shore of Singapore Island, Johore Shoal and the Southeastern coast of the Malay Peninsula.

On the South. A line joining Klein Karimoen to Pulo Pemping Besar (1°06.5′N 103°47.5′E / 1.1083°N 103.7917°E / 1.1083; 103.7917 (S)) thence along the Northern coasts of Batam and Bintan Islands to Pulo Koka.

Pilot guides and charts

Pilot guides and charts of the Malacca and Singapore straits have been published for a considerable time due to the nature of the straits[9][10][11][12]

Second World War

The strait was mined by the British during the Second World War.[13]


In 2009, the Maersk Kendal grounded on the Monggok Sebarok reef.[14]

See also


  1. ^ "СИНГАПУРСКИЙ ПРОЛИВ – это... Что такое СИНГАПУРСКИЙ ПРОЛИВ?". Словари и энциклопедии на Академике (in Russian). Retrieved 2018-07-29.
  2. ^ Cornelius, Vernon. "Singapore Strait". Government of Singapore. Retrieved May 22, 2022.
  3. ^ Liang, Annabelle; Maye-E, Wong (August 22, 2017). "Busy waters around Singapore carry a host of hazards". Navy Times. Around 2,000 merchant ships travel in the area every day, Tan estimated.
  4. ^ "Tumasik Kingdom". Melayu Online. Archived from the original on 12 March 2009.
  5. ^ R. A. Donkin (March 2004). Between East and West: The Moluccas and the Traffic in Spices Up to the Arrival of Europeans. Amer Philosophical Society. p. 91. ISBN 978-0871692481.
  6. ^ Peter Borschberg, ed. (December 2004). Iberians in the Singapore-Melaka Area and Adjacent Regions (16th to 18th Century). Harrassowitz. pp. 97–99. ISBN 978-3447051071.
  7. ^ Borschberg, Peter (2012). "The Singapore Straits in the Latter Middle Ages and Early Modern Period (c.13th to 17th Centuries). Facts, Fancy and Historiographical Challenges". Journal of Asian History. 46 (2): 193–224.
  8. ^ "Limits of Oceans and Seas, 3rd edition" (PDF). International Hydrographic Organization. 1953. Retrieved 3 March 2021.
  9. ^ Great Britain. Hydrographic Dept; Great Britain. Hydrographic Office (1971), Malacca Strait and west coast of Sumatra pilot : comprising Malacca Strait and its northern approaches, Singapore Strait, and the west coast of Sumatra (5th ed. (1971)- ed.), Hydrographer of the Navy, retrieved 12 May 2012[permanent dead link]
  10. ^ Maritime & Port Authority of Singapore; Chua, Tiag Ming (2000), Charts for small craft, Singapore Strait & adjacent waterways (2000 ed.), Maritime and Port Authority of Singapore, retrieved 12 May 2012[permanent dead link]
  11. ^ Great Britain. Hydrographic Dept; Hennessey, S. J (1971), Malacca Strait and west coast of Sumatra pilot : comprising Malacca Strait and its northern approaches, Singapore Strait, and the west coast of Sumatra (5th ed.), Hydrographer of the Navy, ISBN 9780902539716, retrieved 12 May 2012[permanent dead link]
  12. ^ Singapore. Maritime and Port Authority; Singapore. Maritime and Port Authority. Hydrographic Dept (1998), Singapore Strait, Hydrographic Dept., Maritime and Port Authority of Singapore, retrieved 12 May 2012[permanent dead link]
  13. ^ "SINGAPORE STRAIT MINED". The Central Queensland Herald. Rockhampton, Qld. 20 February 1941. p. 34. Retrieved 12 May 2012 – via National Library of Australia.
  14. ^ Great Britain. Marine Accident Investigation Branch (2010), Report on the grounding of mv Maersk Kendal on Monggok Sebarok reef in the Singapore Strait on 16 September 2009, Marine Accident Investigation Branch, retrieved 12 May 2012

Further reading