I dont do salt water fly fishing but i have dont salt water fishing alot, and as far for now the stripers are still out there but it is getting a lil warm lots of bluefish are moving in to the shorelines now great battle w them but not so good eating like the striper. I think cape cop would be just as good as Jersey shore with all the heat I grew up at the jersey shore and there is great fishing here.
If ur looking for a great spot the place to be is Sandy Hook, Manaquan Inlet or Belmar, they are all great beacuse the way the tides move through these places bait fish here are in almost millions garantee a great catch there are many bait shops here that will help u w any question u may have, and really no need for a guide.
the most popular fly fishing spot would be Sandy Hook and a another great thing if u havent been here before all the these places are Within a half hr or less from eachother. if u plan to stay for a a weekend or so u can deffinatly hit all three spots, and great place for family vacation too.