Shag Rock, known to Māori as Rapanui, is a small beach beside the landmark rock at the entrance to the Avon-Heathcote Estuary in Redcliffs, Christchurch — much reduced by the earthquakes, but still unmistakable. Visitors rate it 4.6 from seven reviews.
Beaches on this coast reward a little planning: the estuary side stays shallow and warms quickly, so mid-to-high tide suits paddlers and small children, while currents near the mouth deserve respect. The sea breeze builds through the afternoon, so locals favour early visits or calm evenings. Canterbury sun burns even on grey days, so hats and sunscreen are not optional. Estuary flats are bird country too — shags and waders feed on the shallows, so give flocks a wide berth and keep dogs on leads where signs ask.
Pair it with a ride along the Coastal Pathway and a short hop to Sumner village for one of Christchurch's easiest seaside half-days.