King Tide Monthly Peak
Sea level data produced by LINZ for Waitemata harbour, Auckland and Korotiti Bay, Great Barrier Island dates back to the installation in June 2014. The yellow line in the graph are high tide peaks of each month, with the yellow dotted line displaying the time period's linear trend. The tide height is the raw mean sea level measured in metres using a pressure sensor.
Currently there is a downward trend of peak high tide levels for Waitemata harbour for the last 7 years and 7 months.
Currently there is slight upward trend of peak high tide levels for Great Barrier Island for the last 7 years and 7 months.
Note # A non tidal 60cm tsunami on 11th Feb 2021 and 30cm tsunami on 5th March 2021 is not included in this graph due to non tidal nature of the events.