Tawharanui Marine Reserve is a protected coastal park at the end of Takatu Road on the Tawharanui Peninsula in Rodney, north of Auckland. Visitors rate it 4.9 on Google.
Marine reserves are no-take areas: fishing and shellfish gathering are off limits, which is why fish life grows abundant and surprisingly tame. Snorkelling is the best way to appreciate that, and conditions matter more than equipment — a calm day around high tide usually brings the clearest water. Check tide times before setting out, because low water leaves the rock platforms exposed and the shallows very thin. Bring your own masks and fins, as places like this sit far from any hire shop. The one golden rule is to leave everything exactly as you found it.
Set where the peninsula runs out to sea, it makes a rewarding day trip for anyone willing to drive the length of Takatu Road.