In the northern reach the tidal range (the difference in height between high water and low water) drops with distance from the ocean, from a mean range of about five-and-a-half feet at the Golden Gate to only three feet at Sacramento. In contrast, in the southern reach’s more enclosed basin the tides cause the water to slosh back and forth like water in a bathtub, amplifying the range at the southern end to eight-and-one-half feet.
I wanted to explore this, so I graphed several sites in the Northern Reach, and five in the Southern Reach. These are a work in progress.
The predictions that are graphed here are from Xtide: www.flaterco.com
In the legend, stations are listed in order from the Entrance to the most distant.
"San Francisco" is the Fort Point station.
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