The Jersey shore is going to be wiped out anyway by the next monster hurricane that travels up the the East coast. They’re riding out an incredible string of luck. Wasn’t Agnes in 1972 the last hurricane to heavily damage New Jersey?
Not at all really. You would need a 10 foot minmmum surge over mean high tide to get any real damage. The barrier islands are the most vulnerable - an ocean breach to the bay like in Ash Wednesday Storm of 1962 has the most potential for damage.
Noreasters are worse than hurricanes.
Now, if you have a category 5 head due west with the eye over the tip of Sandy Hook at high tide - you could have the entire lower Hudson under 20 ft. of water. Not much gouging by waves or currents - just alot of flooding.
A direct hit will damage or destroy much property, like a direct hit anywhere else. LBI might be in some trouble.
The Jersey Shore itself will be fine, though maybe reshuffled a bit.