Even the most accurate predictions, which I believe to be on this website, are off to a certain degree most of the time. It usually varies b/c even though they predict a certain scenario for surf, that's just a generilazation for that whole area, not a specific beach. i.e.) where i surf, the report will usually say "chest high, and choppy", but when I get there, it'll be head high and clean. That's just b/c this was a generilaztion for the entire monmouth region, not the specific beach.