According to Horizons Regional Council, Beach front land is growing one to one and a half metres a year. Hence we have long sand dunes. Better the sand dunes accrue as opposed to the sea eroding the sand dunes as is happening in many beach settlements.
The Hyderabad, which was wrecked in 1878, is now completely buried in the dunes.
Please see this recent article on the Surf Club which explains the accretion.