The best option to get to the falls is to rent a car and to drive there yourself. Wainui Falls is about 2.5 hours drive away from Nelson, or 30 minutes from Takaka. There is a 400 meters-long gravel road to get to the parking lot.
Purakaunui Falls
Once you reach the parking lot, the walk to the Purakaunui Waterfalls takes approximately 10 minutes.