Tides

Latest videos

King tides

King tides can change lives. Two out of three New Zealanders live near the coast and rising sea levels mean low lying communities are under even more threat. Use NIWA's charts to find out when your king tides are coming.

Tide forecaster

NIWA's Tide forecaster provides tidal data for any point in New Zealand.

Storm-tide red-alert days 2019

NIWA's 2019 storm-tide red alerts are the highest high tide (also known as king tides) dates that Emergency Managers and Coastal Hazard Managers should write in their diaries and keep an eye on adverse weather (low barometric pressure, onshore winds), river levels and sea conditions (waves and swell).

King tides

King tides can change lives. Two out of three New Zealanders live near the coast and rising sea levels mean low lying communities are under even more threat. Use NIWA's charts to find out when your king tides are coming.

Tide forecaster

Tide and coastal hazards: online resources

Online resources for the management and prediction of tide and coastal hazards

High-tide red alert calendar with mean sea levels

The high-water red-alert calendar forecasts days when the tide + mean sea-level anomaly will be unusually high.

Porirua at Mana Marina

Latest data

Queens Wharf - Wellington

Latest data

Storm-tide red-alert days 2017

Storm-tide red alerts are the highest high tide (also known as king tides) dates that Emergency Managers and Coastal Hazard Managers should write in their diaries and keep an eye on adverse weather (low barometric pressure, onshore winds), river levels and sea conditions (waves and swell).