The 38-year-old "Blurred Lines" singer and his 21-year-old girlfriend are currently vacationing in Saint Barthélemy, France, and were spotted on the beach taking pictures with fans.
According to Geary's Instagram, the couple arrived on Sunday, and she's been documenting moments from their "paradise" getaway ever since.
"Lucky to be in love with my best friend," the bikini-clad model captioned a photo of the two posted on Tuesday, accompanied with the heart eyes emoji.
She seemed to be in very good spirits, judging from the big smile on her face in another photo.
"Rosé all day," another caption read.
Thicke didn't share any photos of the two together, but he did post a pic of his view, captioning it, "Rainbows in heaven!"
Earlier this month, Geary rang in birthday No. 21 with Thicke by her side.
"Kisses for my 21st birthday," she posted, with a photo of her beau giving her a peck on the cheek.
Thicke shared a black-and-white photo close-up of the model snuggled in bedsheets, writing, "Happy Birthday Beautiful!"
Thicke and Geary made their official debut as a couple
at the Cannes Film Festival in May, following Thicke's separation from his high school sweetheart, Paula Patton
, in February 2014.
That same month, the two were also spotted in St. Barts
, soaking up the sun, riding ATVs, and going snorkeling.
Hear more from their tropical adventure in the video below.