Passport and Visa: Make sure your passport is valid for the whole time you are here.
Suitable clothing: Wellington has a temperate climate with a good dose of wind. The temperature in Wellington will rarely rise above 25°C (77°F), or drop below 6°C (43°F). Wellington is however known for its southerly winds in winter, which makes the temperature feel much colder. You will need a warm windproof jacket and a raincoat.
Other clothing you might want to bring:
Sports/Club/Musical Gear: If you are wanting to continue to play a sport, join an activity such as Scouts or join the band, please bring your gear with you (uniform, shinpads, cleats, ballet shoes, trumpet etc)
Outdoor Gear: If you plan to take Outdoor Education or join Duke of Edinburgh, it is helpful for you to bring your outdoor gear (Hiking pack, boots, thermals etc)