I believe it could be referred to as seaside or seashore? I'm wondering the same question, and this is what I've come up with.
i think it is the coast
Land along an ocean or sea is called a coastline.
This can be called a beach, a coast, or a coastline among many other things.
Coastline
cape
A small piece of land in the sea is called an island.
The Shore
I don't know but the land along the edge of a country where the beaches are is called a coast. :)
A sea a portion of ocean that is enclosed or partly enclosed by land
No South China is land, the ocean is called the "South China Sea"
sea breeze
sea breeze
a sea