Hi Vatsal, You can visit New Zealand from February to October for adventure. Also, Attached below with my comments are few packages for hassle free travelling offered by Tripoto. You can take a look, fill the form and someone will get in touch with you. Thanks!
The seasons in New Zealand are directly opposite to those in the Northern Hemisphere, and are the same as those in Australia. March to May autumn in New Zealand is a time of spectacular changes in colours, with vivid russet browns, reds and golden leaves. This is especially the case in Wanaka and the Otago region of New Zealand in the South Island; or Hawkes Bay in New Zealand's North Island. For those on a self drive holiday, if you are travelling any time after Easter, the roads and number of other tourists are always much less; so this is always one of the best times to travel to New Zealand