The "Shake It Off" singer and Scottish DJ recently celebrated their one year anniversary, reported People magazine.
Both stars took to their respective Instagram accounts to share loved up images from their holiday, including a photo featuring bikini-clad Swift, 26, posing for her beau.
The pop star also posted a short video of her jumping on a large, inflatable trampoline floating in the water.
She also added in the caption, "That time when we finally took a vacation."
In another shot posted by Swift, the initials "TS + AW" are written in the sand, with the latter representing Harris' real name, Adam Wiles.