I've been to Huntington Beach (on vacation) and I live in Monmouth County. Eventhough life at the Jersey Shore is relaxing, it's not as laid back as Huntington Beach. We do get good waves for surfing and I would say that Manasquan is probably the closest to HB when it comes to attitude, demographics, and lifestyle.
You can reach out to me via Trulia if you would like to discuss. Good luck!