Tides

NZ has a range of different types of coasts, and so very different coastal erosion and sediment systems.

The waters around New Zealand have some of the highest waves in the world, due to Southern Ocean swell and storms in the Tasman Sea and Pacific Ocean.

Glass eels (about 5.5 to 7.0 cm) arrive in fresh water during spring, especially during September and October, although they may be present from July to December.

In comparison to the vast span of geological time, the estuaries that we see today are very recent coastal features.

Porirua at Mana Marina sea levels

Queens Wharf - Wellington sea levels

Raglan sea levels

Port Taranaki sea levels

Pouto Point sea levels