Martha Nolan-O’Slatarra’s tragic cause of death on Montauk boat eyed as suspected accidental drug overdose: sources

The death of Manhattan swimwear designer Martha Nolan-O’Slatarra at the upscale Montauk Yacht Club is being eyed as a possible accidental overdose, sources said Tuesday.

The 33-year-old Irish beauty was found unconscious at the ritzy club on Aug. 5 aboard a boat named “Ripple” – one of at least two Grateful Dead-themed crafts owned by insurance mogul Christopher Durnan, sources tell The Post.

An autopsy is pending to determine Nolan-O’Slatarra’s official cause of death – although sources said it was a suspected drug overdose.

Suffolk County cops have not filed charges or identified any suspects in the case.

Nolan-O’Slatarra was found on the boat around midnight after club members heard screams, called 911 and then tried to resuscitate the designer – who was later pronounced dead.

Durnan, 60, a familiar figure at the club, owns the Durnan Group in Rockville Center, which manages the “largest, most successful Workers Compensation Safety Group for Real Estate” on the company’s website.

He owns “Ripple” and a second boat, “Hell in a Bucket,” which was docked alongside and is also a shout-out to the Grateful Dead, several club members confirmed.

Nolan-O’Slatarra, a native of the tiny Irish town of Carlow, migrated to the US, where she started as a bottle service girl in SoHo before co-founding East x East, a swimwear label.

She summered in the Hamptons, where she hosted successful pop-up shows and fashion exhibits for wealthy clientele in Montauk and the surrounding area.

— Additional reporting by Brandon Cruz and Joe Marino