For the north side this link can help
https://tidesandcurrents.noaa.gov/no...s?id=ACT1941_1
For the south this link
https://tidesandcurrents.noaa.gov/no...s?id=ACT1866_1
The shape of the island makes it more complicated, however. For example, the flood.......coming from Gay Head direction.....hits the south side and some is pushed around the southwest end (i.e., pyramids) going L to R on the shore if you are facing Gay Head. In mid island you pass a transition zone or dead spot, then get into a R to L flow near the clubhouse. With big moons you can even get another reversal near canapisit channel peeling back down barges beach a ways.