Oceanside Harbor holds several sections with often very good waves. Surfing near the jetty, on either side, can be very dangerous if you are inexperienced, and the crowd will get quite aggressive when conditions are good. The wave at the jetty is a heavy and fast breaking section that, like most waves at river mouths, can provide an opportunity to get inside "the blue curtain." On either side of the jetty there are peaks that will move around due to the sandy bottom, but overall most waves will have decent shoulders to ride. Nearer to the jetty, and in larger conditions, it's best to ride something short, but on smaller days a long board does the trick just fine. It's best to ride here on a medium tide.