Portland: Sea-Level Data At Portland

Description Usage Format Source See Also


The Portland data frame has 26304 rows and 2 variables. It gives hourly sea-levels in metres (above Tide Gauge Zero) recorded by the tide gauge within the (UTC) years of 2012-2014. The sea-levels are in the second column. The first column is a POSIXct object giving the dates and times in UTC.

Portland is one of the sites currently used for the Australian Baseline Sea-Level Monitoring Project (ABSLMP). Hourly data for these sites is available from the Australian Bureau of Meteorology.

To obtain the sea-level in AHD (Australian Height Datum), you will need to subtract 0.507 metres from the values given in the dataset.




This data frame contains the following columns:


A POSIXct object where times are in UTC.


The sea-level in metres above Tide Gauge Zero. Any missing or erroneous data points are set to NA.


Australian Bureau of Meteorology.

See Also

ftide, harmonics

TideHarmonics documentation built on May 2, 2019, 6:34 a.m.