Visualizing the tides of San Francisco Bay

by Evan Morrison. 21 January 2016.

Just for fun, here is every high and low tide for San Francisco Bay in 2016. Red dots are the high tides; blue dots are the low tides. (click to enlarge)

sf high and low tides

data source

I found it interesting that the highest low tide of the year is lower than the lowest high tide of the year. There’s a certain narrow range of water levels - about 3.1-3.4 feet - which sees neither high tides nor low tides. Perhaps there’s some obvious reason for this, known to oceanographers, but it was news to me! I’m also curious if the non-overlap of high and low tides is true everywhere?

Any tide gurus out there?

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Posted in: analysis Tags: data , San Francisco