Świna in the context of "Oder River"

The Oder (/ˈoʊdər/ OH-dər; Czech and Polish: Odra) is a river in Central Europe. It is Poland's second-longest river and third-longest within its borders after the Vistula and its largest tributary the Warta. The Oder rises in the Czech Republic and flows 742 kilometres (461 mi) through western Poland, later forming 187 kilometres (116 mi) of the border between Poland and Germany as part of the Oder–Neisse line. The river ultimately flows into the Szczecin Lagoon north of Szczecin and then into three branches (the Dziwna, Świna and Peene) that empty into the Bay of Pomerania of the Baltic Sea.

Świnoujście (Polish: [ɕfʲinɔˈujɕt͡ɕɛ] ; German: Swinemünde German pronunciation: [ˌsviːnəˈmʏndə]; Low German: Swienemünn; meaning "Świna [river] mouth"; Kashubian: Swina) is a city in Western Pomerania and seaport on the Baltic Sea and Szczecin Lagoon, in the extreme north-west of Poland, mainly on the islands of Usedom, Wolin, and Karsibór, the latter once part of Usedom, now separated by the Piast Canal to facilitate ship access to Szczecin.

Świnoujście borders the German seaside resort of Ahlbeck on Usedom, connected by a street and 12 km (7 mi) of beach promenade.

The Dziwna (German: Dievenow) is a channel of the Oder River in northwestern Poland, one of three straits connecting the Szczecin Lagoon with the Bay of Pomerania of the Baltic Sea. It separates the island of Wolin from the Polish mainland. The other two channels are the Świna and the Peene.

About 32 km (20 mi) in length, the Dziwna forms on the eastern end of the Szczecin Lagoon, near the town of Zagórze, Kamień County. Flowing north, it passes the town of Wolin and then widens and forms a number of connected features. Towards the west the main channel of the Dziwna forms the large Kamieński Lagoon (Polish: Zalew Kamieński). To the east a side channel develops into the Zatoka Cicha (Quiet Bay, known as Die Maad before 1949), flows north through the strait of Promna as it approaches the city of Kamień Pomorski, then rejoins the Kamieński Lagoon. Between these two channels stands the small, largely agricultural island of Chrząszczewo connected to Kamień Pomorski by a single bridge.

The Bay of Pomerania (Polish: Zatoka Pomorska [zaˈtɔ.ka pɔˈmɔr.ska]; German: Pommersche Bucht; Kashubian: Pòmòrskô Hôwinga) is a basin in the southwestern Baltic Sea, off the Pomeranian shores of Poland and Germany. It stretches between the northernmost tip of the island of Rügen called Gellort northwest of Cape Arkona in the west, and the village of Jarosławiec in the east. In the south, it is bounded by the islands of Usedom/Uznam and Wolin, which separate it from the Szczecin Lagoon which is flown through by the Oder River, and is connected to the bay by three straits, the Dziwna, Świna, and Peenestrom.

The Bay of Greifswald with the islands of Koos and Vilm is a large sub-bay in the southwest of the Bay of Pomerania. Apart from Rügen, Usedom/Uznam, and Wolin, the islands Greifswalder Oie and Ruden also lie in the Bay of Pomerania. Maximum depth is 20 metres and salinity is about 8%. The main ports on the Bay of Pomerania are Mukran Port in Sassnitz-Mukran, the port of Świnoujście, the port of Kołobrzeg, the port of Greifswald on the mouth of the Ryck River in Greifswald-Wieck, the port of Dziwnów, and the port of Wolgast.

Wolin (Polish: [ˈvɔlin]; German: Wollin [vɔˈliːn]) is a Polish island in the Baltic Sea, just off the Polish coast. Administratively, the island belongs to the West Pomeranian Voivodeship. Wolin is separated from the island of Usedom (Uznam) by the Strait of Świna, and from mainland Pomerania by the Strait of Dziwna. The island has an area of 265 km (102 sq mi) and its highest point is Mount Grzywacz at 116 m above sea level. The number of inhabitants is 30,000. Eastern suburbs of the city of Świnoujście extend to the Wolin island, while the towns of Międzyzdroje and Wolin lie further east.

Water from the river Oder flows into the Szczecin Lagoon and from there through the Peene west of Usedom, Świna and Dziwna into the Bay of Pomerania in the Baltic Sea.