According to an EPRI study, the available waves electricity resource of the U.S. is about 2,100 terawatt-hours (TWh) per year (1 TW = 1,000,000 megawatt). Assuming that society in the future will develop 15% of the potential wave energy with typical efﬁciencies, the U.S. potential is about 255 TWh per year. This is about 6.5% of total U.S. electricity generation. This is enough to power about 22 million homes (the typical U.S. home uses an average of about 1.3 kilowatt).
This worldwide waves density map shows that the coast lines with the highest potential wave energy are facing west, with a large ocean to the west and north, with southern latitudes of about 30 to 60 degrees.