The lunar month’s highest tide occurred on 3rd February for Waitemata harbour and 2nd February for Great Barrier Island.
The Waitemata harbour tidal gauge measured a mean level of 1.54 metres between 9:45am and 10:00am on 3rd February which is 16cm below the February average (2015-2021). The barometric air pressure at the time of the reading was 1016.2 hPa, so when using the inverted barometric adjustment calculation method of 1cm for every 1 hPa, the projected height would have been 1.57 metres at the mean sea level pressure of 1013 hPa. More on meteorological effects on tides can be found here.
The ongoing trend between 2014 to 2022 for the Waitemata harbour sea level peak is downward. The tidal gauge data used for this analysis can be found here.
The Great Barrier Island tidal gauge measured a mean level of 1.24 metres between 08:45am and 09:00am on 2nd February. The air pressure at the time of the reading was 1019.4 hPa, so when using the inverted barometric adjustment calculation method of 1cm for every 1 hPa, the projected height would have been 1.30 metres at the mean sea level pressure of 1013 hPa. More on meteorological effects on tides can be found here.
The ongoing trend between 2014 to 2021 for Great Barrier Island sea level peak is slightly upward. The tidal gauge data used for this analysis can be found here.
