North, South, East and West - Usage

Each of the points of the compass (north, south, east, west, south-east, north-west etc) can be:

Look at some more example sentences:

Penguins live in the south. noun
The wind is coming from the east.
He lives in the south-east of England.
He lives in South London. adjective
The storm will reach the north-west coast tomorrow.
Polar bears live at the North Pole.
Penguins live at the South Pole.
Is the country South Africa in the south of the African continent? adjective | noun
Our house faces south-west. adverb
Our car broke down a mile east of the city.
He lives south of London.
The points of the compass are capitalized when they form part of a name, for example: South Africa, East Timor, North America, the South Pole, Northwest Territories

In the picture below, notice the important difference between "in the south" and "to the south" or just "south":

south of London

Here are some more examples: