The jetty at Barnegat Light, on the north end of the island. You can walk out to the end, just be careful. The beach and along the dunes near the jetty also.
Forsythe is good all year round, although you can hit a slow day. The problem in summer is bugs, especially green-head flies, which can be intimidating as you're driving with a dozen or so on you windshield. I use Deep Woods Off and tend to not be bothered by them. You can shoot mostly from your car, but when you roll down the window you may get visitors. But plan to spend some time there if you can, and be observant - there's a lot there. You'll probably find other photographers there (maybe me) who are generally happy to fill you in on any activity.
A lot of my flickr stuff is from those two places - see link below.