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Tide resources
NIWA has a range of online tools and information relating to tides, including a tide forecaster, yearly tide envelopes and storm tide "red alert" days. -
Waves
Education ResourceThe 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. -
Scientists set to delve into the secrets of the Cook Strait mega-canyon
News article06 June 2017 -
Tuna - glass eels
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. -
Summer Series 6: Nippy creatures that share your swim
News article06 June 2017 -
Estuary origins
In comparison to the vast span of geological time, the estuaries that we see today are very recent coastal features. -
Sea levels and sea-level rise
Education ResourceOne of the major consequences of climate change is rising global sea levels. -
Wave action
Feature story06 June 2017New 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. -
Tide envelopes 2015
The range for high and low tides throughout the year across the country for 2015.