Senior Moderator; Moderator, Eco-Conscious Travel, United and Flyertalk Cares
Join Date: Jun 1999
Location: Fulltime travel/mostly Europe
Programs: UA 1.7 MM;; Accor & Marriott Pt; Hyatt Globalist
Posts: 17,831
I was there in March and April. In August you can expect some pretty cool temps.
From my handy Traveler's Weather Guide:
Auckland: 58/46F, 19 days of precip., 4.6"
Christchurch: 52/36F, 11 days precip., 1.9"
Wellington: 54/43F, 17 days precip., 4.6"
The best weather is November through March.