Just pick a jetty before 10 am and after 5pm (lifeguards) if you want to have a pleasurable experience surfing NJ that time of year, wherever you end up. The better known spots will be mobbed if there's a decent wave, and the next jetty down might be just as good. That time of year is usually feast or famine, and if there's tropical swell, usually (not always) every town gets their share so take your pick. Have fun and play nice.