Off the motorway at Western Springs or Waterview and go into the Pt Chev village. Turn into Pt Chevalier Rd at the main lights by the library. Down this road for a few km and you will come to the only bend where there is a garage issuing WOFs on Sundays, a dairy and Pt Chev Sailboards. 

Turn left into this road which is Raymond Rd. All the way down it and turn right into reserve where you can see the sea. Plenty of parking and rigging area down the bottom area.
Click map for birds eye version. Use Back key to shrink

Map courtesy http://earth.google.com. or use http://www.wises.co.nz