Where is the Australian Whangarei? (For the cyclone season)

[Wellington]

Our insurance company wants us to spend the next cyclone season South of 31 degrees (the latitude of Port Macquarie, about 300 km North of Sydney)
We are ideally looking for a small town offering a good mooring (possibly in a marina or on a buoy, if we can't be on the hook), with high, middle and primary schools nearby within walking distance from the dinghy dock for our children.
Are there such places in the Bay of Sydney?
Or where would you recommend? Where is the Australian Whangarei?
Thanks