Karanga Plaza Harbour Pool is a free outdoor swimming pool in the Viaduct Basin on the Auckland waterfront, at the Karanga Plaza Tidal Steps in Wynyard Quarter. The pool is enclosed by pontoons that keep swimmers apart from the boats in the viaduct channel. It has 33-metre swimming lanes with lane ropes and ladders, and a jumping platform with a grab rail for getting out of the water.
It is open daily from dawn to dusk. Lifeguards are on duty during the summer peak season, and the safety signs at the pool confirm when they are present. Toilets and cold water showers are in the nearby Karanga Plaza, and the changing booths there are small and not universally accessible. The pontoons rise and fall with the tide, so the access gangway is steep at low tide and is not always usable for everyone.