State Highway 45 (SH 45) is a New Zealand state highway which has the moniker of the Surf Highway due to the number of prominent surfing breaks that are accessible from it.
It is two-line single carriageway for most of its length, with at-grade intersections and property access‘ in both urban and rural areas.
SH 45 leaves SH 3 at the corner of Leach and Eliot streets north-east of the New Plymouth CBD. It then continues west along the New Plymouth one-way network (westbound Leach and Vivian streets, eastbound Powderham and Courtenay streets) then onto Devon St West and South Road exiting New Plymouth via the south-western suburbs. It then heads south-west along the Taranaki coastal plain passing through Oakura and Okato. At Cape Egmont it turns south-east following the coast passing the Oaonui production station and through Opunake and Manaia before terminating at the northern roundabout in Hawera where it again meets SH 3.