“Days like these Shabbat Shalom,” the supermodel, 31, captioned the image suntanning in a bikini.
Earlier this month, she radiated the red carpet at an event in Madrid, Spain.
The Israeli beauty and her businessman husband Adi Ezra, 42, are expecting their second child, she announced via social media in March.
“Something’s cooking,” the Sports Illustrated Swimsuit model captioned the mirror selfie of her bare baby bump.
The newborn will join 9-month-old big sister Liv.
Refaeli and Ezra– who were wed in Haifa, Israel in September 2015 – welcomed their firstborn on Aug. 11, 2016.