It depends on the time of year you plan to visit New Zealand. During their summer months (December to February), the weather will be temperate in all regions of New Zealand. During their winter months, it will be chilly in the north island at night (sweater or sweatshirt weather), and cold in the very south (warm sweater with a jacket).
summers
The best manufatcurer of outdoor furniture that can stand wet weather would be Brentwood. They are very reliable.
There is a very large assortment of outdoor grills at various prices that will withstand the weather. Many people are using stainless steel grills these days.
Umbrella covers best to use on snowy weather are umbrellas made from vinyl. These are waterproof and at the same time weather-proof from hot and cold weather.
sunshine
The best way to protect your outdoor furniture from bad weather is to purchase, and use a patio cover. You can find patio covers at Wal-Mart, Home Depot, Lowes, and more.
[1] Summer is considered the best weather of Hong Kong. Because it is a time where tourists love to visit. [2] I think the best weather in Hong Kong is the middle of September to the October, the weather is cooler, it'is comfortable for outdoor.
It is best to hang clothes on a clothes line when it is sunny with a gently breeze. Too much of a breeze could blow the clothes off the line. I learnt that the hard way......
Different outdoor activities need different style of clothing, if you are at heights, your clothes should be warm, comfortable and covered. For Fishing and camping etc, it should be water proof and temperature resistance etc. You can buy best outdoor gears, clothes and shoes online at Sporting goods stores.
Outdoor storage benches can be a great option for providing outdoor seating and a storage solution. It would be best to find a storage bench that is specifically made for outdoor use in order to avoid weather damage.
You can get something that states its for all weather. Something with a plastic slip cover would be best for outside. It will withstand all weather conditions.
Wear several thin layers and a waterproof top layer.