Atmospheric analysis

South-West North Island
New Plymouth, Wanganui, Palmerston North, Wellington
Because of its exposure to disturbed weather systems from the Tasman Sea, this climate zone is often quite windy, but has few climate extremes. The most settled weather occurs during summer and early autumn. Summers are warm. Typical summer daytime maximum air temperatures range from 19°C to 24°C, seldom exceeding 30°C. Winters are relatively mild in New Plymouth and Wanganui, but cooler in Palmerston North and Wellington. This is normally the most unsettled time of the year.

The current method for calculating wind speed-up is inadequate, and can grossly under-predict correct design wind speeds in NZ's complex terrain.

What does science tell us about New Zealand flounder?

Stormwater is a major concern for New Zealand because of its potential effects on the ecological health of our urban streams and coastal waters, as well as on the economic, social and cultural value of these environments.

Post-Doctoral Fellowship positions at NIWA.

This calculator estimates the solar energy that can be collected by a solar capture device (solar panel) at a given address, panel direction and roof slope.

An estuary is a partially enclosed body of water formed where freshwater from the land meets and mixes with saltwater from the ocean.

Few New Zealand lakes retain their indigenous vegetation, and the condition of many lakes is under threat from land-use changes and the invasion of alien aquatic plants.

Useful information and resources on New Zealand's marine flora and invertebrate fauna.

A basket star was the first reported animal trawled up from the deep sea back in the early 1800s so they have a spot in the history books of deep ocean exploration.

There are two methods to determine visual clarity in SHMAK; the clarity tube (or SHMAK tube) and the black disc method.