Gulf of Trieste

Coordinates: 45°40′N 13°35′E / 45.667°N 13.583°E / 45.667; 13.583
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Gulf of Trieste
Mapa - Adriatic Sea map - Gulf of Trieste.PNG
Gulf of Trieste highlighted in red within the Adriatic Sea
Gulf of Trieste is located in Italy
Gulf of Trieste
Gulf of Trieste
Coordinates45°40′N 13°35′E / 45.667°N 13.583°E / 45.667; 13.583
Basin countriesItaly, Slovenia, Croatia
Surface area550 km2 (210 sq mi)
Average depth18.7 m (61 ft)
Max. depth37.25 m (122.2 ft)
Water volume9,500 km3 (7.7×109 acre⋅ft)
Salinity35-38 PSU
SettlementsTrieste, Koper
Gulf of Trieste and the littoral
Panoramic view of the Gulf of Trieste from the vicinity of Socerb Castle in Slovenia. One may see the Savudrija Cape and the city of Koper at the Slovene Riviera to the left, the Muggia Peninsula and the village of Muggia in the centre, and the city of Trieste to the right.

The Gulf of Trieste (Italian: Golfo di Trieste, Slovene: Tržaški zaliv, Croatian: Tršćanski zaljev, German: Golf von Triest) is a very shallow bay of the Adriatic Sea, in the extreme northern part of the Adriatic Sea. It is part of the Gulf of Venice and is shared by Italy, Slovenia and Croatia. It is closed to the south by the peninsula of Istria, the largest peninsula in the Adriatic Sea, shared between Croatia and Slovenia. The entire Slovenian sea is part of the Gulf of Trieste.


The gulf is limited by an imaginary line connecting the Punta Tagliamento on the Italian and Savudrija (Punta Salvore) on the Croatian coast. Its area is approximately 550 square kilometres (210 sq mi), its average depth is 18.7 metres (61 ft), and its maximum depth is 37 metres (121 ft). With the exception of flat islets blocking the entrance to Marano-Grado lagoon, there are no islands in the gulf. Its eastern coasts, with Trieste and the Slovenian Littoral, have more rugged relief.

The sea current in the gulf flows counterclockwise. Its average speed is 0.8 knots. Tides in the gulf are among the largest in the Adriatic Sea, but nevertheless do not usually exceed 60 centimetres (24 in). The average salinity is 37–38, but in the summer it falls below 35‰.

Its most prominent features are:

The entire Slovenian coastline is located on the Gulf of Trieste. Its length is 46.6 kilometres (29.0 mi).[1] Towns along the coastline include (from east to west) Koper, Izola, and Piran.

See also[edit]


  1. ^ The World Factbook by CIA (retrieved 2008-02-12)

External links[edit]

  • Media related to Gulf of Trieste at Wikimedia Commons
  • Gulf of Trieste on Archived 2016-03-04 at the Wayback Machine (map, relief, orthophoto)
  • Conditions in the Gulf of Trieste on and near the Slovene coast:
    • Koper - graphs, in the following order, of water level and temperature data for the past 30 days (taken in Koper by ARSO)
    • Piran - graphs, in the following order, of water temperature, wave height, wave (interval) period, wave direction, current speed, current direction, maximum wave height data for the past 30 days (taken near Piran by ARSO)