Most open water distance swimming takes the tides into account. Here's an article that gets into it a bit with some data to boot... https://evanmorrison.com/s

Most open water distance swimming takes the tides into account. Here's an article that gets into it a bit with some data to boot... https://evanmorrison.com/swim/posts/manhattan-swim-tides/ https://evanmorrison.com/swim/posts/manhattan-swim-tides/