The “Ray Donovan” star, 50, and Neisen, 26, were photographed in their swimsuits and wetsuits as they lounged on the beach and took on the Long Island waves.
Both Schreiber and Neisen, who is a former Miss South Dakota, took their boards out onto the ocean, though it appears only Neisen suffered a wipeout.
When the former beauty pageant star wasn’t in the water, she stripped off her wetsuit and showed off her teenie black-and-white bikini.
The rumored couple, who got together following Schreiber’s split from Naomi Watts but never confirmed the relationship, previously vacationed in Costa Rica together, where they were spotted frolicking on the beach along with Schreiber’s two sons, Alexander and Sam.
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