Waikato is a large area of the west coast of the north island between Auckland and Taranaki. The Waikato features the Waikato River, which is one of the largest in New Zealand. The Waikato area is best known for Raglan, one of the top surf breaks in New Zealand. Hamilton is the main city in the area and good place to base yourself for traveling around the region. Waikato is nice and warm as New Zealands climate goes.
Waikato is on the west Coast, meaning it gets the very consistant and often big and raw south westerly swells producing great surf. The most popular break in the region is Raglan and being a left hand point break it gets very crowded and the locals can get protective of this break, so know the rules and be careful.