As New Zealand's main surrounding waters are the Tasman Sea and the Pacific Ocean, the average sea level can be taken to be 0 metres. The actual level of the sea at a single point varies of course with the tides, with a much smaller effect of El Niño/La Niña-Southern Oscillation.
Taupo's elevation is 760 m above sea level.
The closest spot height above sea level I found was 23m.
The Tasman Sea is on the western side of New Zealand.
100 meters
At sea level it's 0m but the highest point is mount cook
New Zealand has a range of altitudes from sea level through to the peak of Mount Ruapehu at 2797m in the North Island and to the highest peak of Aoraki Mount Cook in the South Island of 3754 m.
The Tasman Sea lies close to New Zealand, being the sea between New Zealand and Australia.
212 meters
The elevation of Hamilton, New Zealand, is 40 m (131 ft).
Cromwell, New Zealand is approximately 192 meters (630 feet) above sea level.
Picton, New Zealand is approximately 2 meters (6.6 feet) above sea level.
Taupo's elevation is 760 m above sea level.
Sea level is the lowest altitude of land in New Zealand.But most of the southern lakes are glacial carved, and their lowest points are below sea level.
The closest spot height above sea level I found was 23m.
32 meters
The Tasman Sea is on the western side of New Zealand.
Wellington, the capital city of New Zealand, is situated at sea level since it lies along the coastline of the North Island.