Absolutely beautiful - I used Oh Yah to get to the location and the tour guide was amazing. Go up to the Lion hill fantastic.
West Coast Beauty , amazing & cheap Campground here to stay & watch a sunset
Piha is a great place for tourists to Auckland to visit because it's reasonably unique amongst New Zealand's beaches. Piha is a black sand beach with fantastic surf (though caution is recommended for beginners). As well as swimming there are some lovely walks and waterfalls to explore. The small township has a couple of great cafes and an interesting art gallery too.