December to March is considered to be the best time to visit New Zealand. If madding crowds don't confuse you, summer season with its mellow weather will be perfect for grasping the beaches, enjoying clams, exploring Waitomo Glowworm Caves, and stargazing. You could also opt for mild and uncrowded autumn and spring. October and November are all about baby lambs in green pastures and Lupin blooming, while April and May will show you terrific Aurora Australis, Milky Way, and stunning autumn foliage. The North Island gets lots of rains, while South Island often sees massive snowfalls and temperatures below zero between June and September. Winter season rejoices passionate skiers, hot pools lovers, and whale watchers.