The WORLD GUIDE says:

"North America’s west coast faces the expansive Pacific; the east braves the stormy North Atlantic and Gulf of Mexico. Even though all northern latitudes lie in the low pressure westerly wind zone and subtropical areas are mostly influenced by high pressure, wind and weather patterns differ greatly between the two coasts. When it comes to swell supply it also matters whether you rely on the front or tail end of weather systems, giving the west coast a definite advantage. Another stark fact at subtropical latitudes is that water temperatures are significantly lower on the west coast compared to the same latitude out east. On the west coast, the North Pacific’s north-south flowing California Current feeds... " world guide