Grassy Bay is a relatively open 2 km wide south-southeast-facing bay, bordered by low rocky points extending 500 m seaward. Three near continuous beaches occupy the bay shore (KI 27-29). Beach KI 27 is a 600 m long south-facing more exposed beach that receives southwesterly waves refracting around Stokes Point and averaging up to 1.5 m. These maintain a 100 m wide transverse bar and rip surf zone, with usually two central beach rips and permanent rips against the rocks at each end. Beach KI 28 commences 50 m to the east past the low boundary rocks and reef and is a 700 m long east-southeast-facing sandy beach, with some rocks outcropping off the eastern and a western boundary rock-reef. It usually has two beach rips and rips against the boundary rocks. Beach KI 29 continues southeast for another 700 m to the side of the Grassy mine tailing slope, which extends up to 500 m across the original shoreline of the bay. Waves decrease to the east and average about 1 m, with two to three rips usually dominating the beach. The high tide beach transforms from sand in the east to cobble and boulders towards the tailings. All three beaches are backed by well vegetated Holocene transgressive dunes that in lee of the eastern two beaches (KI 27-28) have migrated up to 1.6 km inland, up the 90 m high slopes of Bold Head and over to the northern side on Bold Point. Both dunes and the disused open cut mine back beach KI 29. read more

Beach Length: 0.6km