The west coast of North America. Most of the east coast is warmed by the Gulf Stream.
This is not true. It is not colder on the west coast of the US than the east coast. I am in California and it was 82 degrees yesterday, but the east coast has 7 feet or more of snow. Maybe you are not asking about the US.
Colder && Denser.
Due to ocean currents
ocean currents truly are everywhere, but the do not occur directly on the coast.
The northern coast is colder than southern coast.
The higher up in elevation a place is, the colder it will be. As for surface currents, I have no clue.
Pretty much the same. Salty and wet. The temperature of the water on the west coast is pretty much like the temperature in the Northeast US. The Atlantic has the Gulfstream which is a warm sea current that travels northward along the coast from below Florida up to the Outter Banks of North Carolina where it meets the Southern flowing and colder Labrador current. These currents meet at Diamond Shoals in Buxton NC, The water temperature south of the shoals is warmer than the water north of the shoals.
The coast had dangerous shoals and currents.
Montreal has colder winters Vancouver has colder summers
The ocean currents are colder than the currents in the mantle,and the are located in different areas.
density currents and Earth's rotation.
Because the water is warmer at the equator than at the pole. The warmer ocean water is the faster the currents move and the colder the water is the slow the currents move.