The mean sea level (MSL) trend at Honolulu, HI, USA is (?) mm/year with a 95% confidence interval of ±(?) mm/year, based on monthly mean sea level data from (????) to (????). That is equivalent to a change of (?) feet in 100 years. (R‑squared = (?))
The plot shows the monthly mean sea level without the regular seasonal fluctuations due to coastal ocean temperatures, salinities, winds, atmospheric pressures, and ocean currents. The long-term linear trend is also shown, in red, along with its 95% confidence interval. The plotted values are relative to the most recent Mean Sea Level datum established by NOAA CO-OPS.
Data source: ? months from NOAA + ? months from PSMSL.
For a simple explanation of the meaning of the 95% confidence & prediction interval traces shown in the graph, see this two-minute instructional video, by Dr. Gerard Verschuuren.
To see precise values, hover your mouse cursor over the graph traces (or touch the graph on a touch-screen).
To download the seasonally-adjusted monthly MSL data from NOAA, in CSV format, click here.
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