Boobluver last summer here, around Feb or March usually have pretty good surf but when you have a city that is splashed across the east coast you can always find some spots to dip your toe in.
Winter here isn't that cold either and as long as you have a steamer most days you can paddle out and catch some pretty good surf.
The city beaches are good for eye candy but you'll need to head North or South of the city for 30-60 mins to catch some really secluded, beautiful surfing beaches

that was pretty funny