die Südküste
south coast
The section of coast of a country, island, or continent that faces south.
Wir verbrachten unseren Urlaub an der sonnigen Südküste Spaniens.
We spent our vacation on the sunny south coast of Spain.

south coast
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south coast
The section of coast of a country, island, or continent that faces south.
Wir verbrachten unseren Urlaub an der sonnigen Südküste Spaniens.
We spent our vacation on the sunny south coast of Spain.

'Die Südküste' (south coast) is a compound noun made up of 'Süd' (south) and 'die Küste' (coast). This pattern works with all compass directions: 'die Nordküste' (north coast), 'die Westküste' (west coast), 'die Ostküste' (east coast).
Die Ostküste der USA ist dicht besiedelt.
The east coast of the USA is densely populated.
With 'Küste' (coast), the preposition 'an' is used. To express movement, you use 'an die Küste' (to the coast, accusative). To describe a location, you say 'an der Küste' (on/at the coast, dative).
Nächstes Jahr fahren wir an die Südküste.
Next year we are going to the south coast.
To specify which country or island is being referred to, the genitive or the preposition 'von' (of/from) is usually used. For example: 'die Südküste Englands' (the south coast of England) or 'die Südküste von Kreta' (the south coast of Crete).
Die Südküste von Portugal ist für ihre schönen Strände bekannt.
The south coast of Portugal is known for its beautiful beaches.
east coast
'die Ostküste' and 'die Südküste' both refer to part of a coast. The difference is the direction. 'die Ostküste' is in the east of a country, island, or continent. 'die Südküste' is in the south. The words can be confused because they are built the same way and only the compass direction is different. So pay attention to the location on the map: east means 'Ostküste', south means 'Südküste'.

Im Sommer fahren viele Familien an die Südküste der Insel.
In the summer, many families travel to the south coast of the island.
An der Ostküste der USA liegen Städte wie New York und Boston.
Cities such as New York and Boston are located on the East Coast of the USA.