Carrying a red and white striped towel, Sylvia sported long-sleeved, black jumper that was made of a woollen fabric and an army green felt hat.
With husband Peter Stefanovic mostly staying on dry land, the 31-year-old stripped out of a jumper and shorts to reveal a pale orange bikini underneath.
Peter also carried a towel, and was barefoot in bright orange shorts with an amusing shirt bearing the face of a cat worn underneath a navy jacket.
She also stopped for a chat with a man on the shore who was holding goggles, perhaps warning him of the water's temperature She also stopped for a chat with a man on the shore who was holding goggles, perhaps warning him of the water's temperature.
Casual chic: Sylvia added a green felt hat and a pair of sunglasses to her ensemble She paired the look with loose, khaki shorts and slides, and carried a dark green bag.
Earlier, Peter shared snaps from their day out, including a shot of Sylvia enjoying a coffee at a cafe by the shore, to which he added a sweet heart-eyed emoji.