In New Zealand, be prepared for weather that can turn suddenly and temperatures that vary greatly from day to night, particularly at the change of seasons. Wear layers. You'll appreciate being able to remove or put on a jacket. Take along a light raincoat and umbrella, but remember that plastic raincoats and nonbreathing polyester are uncomfortable in the humid climates of Auckland and its northern vicinity. Many shops in New Zealand sell lightweight and mid-weight merino wool garments, which are expensive but breathe, keep you warm, and don't trap body odor, making them ideal attire for tramping. Don't wear lotions or perfume in southern places like Southland, either, because they attract mosquitoes and other bugs; carry insect repellent. Sand flies seem drawn to black and dark blue colors (so they say). Bring a hat with a brim to provide protection from the strong sunlight and sunglasses for either summer or winter; the glare on snow and glaciers can be intense. There's a good chance you'll need warm clothing in New Zealand no matter what the season; a windbreaker is a good idea wherever you plan to be.
Dress is casual in most cities, though top resorts and restaurants may require a jacket. Some bouncers for big city bars will shine a flashlight on your shoes; if you like these kinds of places bring some spiffy spats. In autumn, a light wool sweater or a jacket will suffice for evenings in coastal cities, but winter demands a heavier coat—a raincoat with a zip-out wool lining is ideal. Comfortable walking shoes are a must. You should have a pair of what Kiwis call "tramping boots," or at least running shoes if you're planning to trek, and rubber-sole sandals or canvas shoes for the beaches.
MetService. New Zealand current and forecasted weather. www.metservice.com.