Brooke Monk is soaking up the sun in Hawaii ... while flaunting her stunning figure in a cutout swimsuit.

Check out the influencer's gorgeous Instagram photos ... she's strutting her stuff in a green one-piece as she poses along the sandy shore.

She's on a group trip -- enjoying a break from mainland USA by taking in the Island living with her longtime boyfriend, content creator Sam Dezz, and pal Leah Halton.

The pair posed together on the beach, too ... Leah in a blue and yellow bikini and Brooke in a colorful patterned one-piece.

Brooke and her posse did more than just pose on the coast -- her latest post also shows they enjoyed hibachi, explored the jungle, and spent some time with horses.

Looks like a beautiful trip for a good-lookin' group!