I think surfline understands the difference between 7 and 15 second swell period. I doubt they are giving surf forecasts for new jersey in Hawaiian scale. They have an "ask the forecaster" blog that has pretty interesting stuff. The other day someone asked about east coast southern hemis and the answer was pretty informative.
Originally Posted by Jabajaw
either way, this site is better, and so is just looking at the raw data and making your own forecast.