I am wild about the ocean and many of its legends, and this film combines both wonderfully. I also took some style notes when watching it. The main character, a little blond serious child named Fiona, wears home-spun dresses with colorful little woolen sweaters along with a single dark maroon coat, and she always carries a cloth bow in her hair, or once, a single barrette. Throw on a cute little cardigan over a collared dress with colorful buttons and a grownup version of a bow in your hair, and you are all set to explore a day at sea!
I think the single blue barrette clipping back one side of her hair is genius.
OR you could take inspiration from the lovely (spoiler alert!) selkie girl, and wear only a seal skin, or a long white dress with your hair unbound as you wade into the ocean. Sounds like a fantastic day to be honest.
Either way, The Secret of Roan Inish is now a favorite of mine.
<3 The Magpie