There are three main multi-day hiking trails on Stewart Island:
Rakiura Track (3 days)
North West Circuit (9-11 days)
Southern Circuit (6 days)
Stewart Island can be visited all year round, and it possible to do the aforementioned hikes at any time of the year. But, our recommendation is to visit sometime during the peak summer months, when the weather is warmer, sunny days are (slightly) more likely, and the daylight hours are longer.
We suggest visiting December through March. …
Ultimate Gear Lists – STEWART ISLAND HIKING GUIDE
The weather is notorious. But your biggest problem is not likely to be mud … it will be sandflies.
besthike.com 