The island native and the British racing driver were spotted on a yacht with friends in the Caribbean on Friday.
Hamilton, 30, stayed dry on deck as Rihanna, 27, and her girlfriends enjoyed an inflatable boat ride pulled along by a catamaran.
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Judging by their social media accounts, it looks as if the two have been spending quite a lot of time with each other lately. Earlier this week they were photographed together at the Kadooment Day parade on the island.
Rihanna and Hamilton shared photos and videos with fans on their instagram accounts. In the photos Rihanna is seen wearing an elaborately bejeweled two-piece and feathered headdress. Hamilton kept it simple with shorts and a hat, forgoing the option of a shirt.