Coasts

Submerged plants have a number of advantages that favour their use as indicators of lake ecological condition.

Tsunami is a Japanese word meaning great wave in harbour.

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

One of the major consequences of climate change is rising global sea levels.

This system combines daily sea-level data from NIWA, regional councils, port companies, Antarctica NZ, Bureau of Meteorology and territorial authorities.

If you're collecting sea shells at the beach this summer and wondering what they are, NIWA is here to help.

Dog Island levels

Estuaries are at the bottom of the freshwater drainage network and, effectively, are a part of it.

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

New Zealand’s coast is sculpted by ocean waves. Some wave conditions bring joy to surfers and beachgoers, but, at other times, waves can cause major hazards at sea or along the shore.