The unidentified 56-year-old woman was discovered around 8:25 a.m., Tuesday, June 29, near the boat ramps of Iron Pier Beach in Riverhead.
According to Riverhead Police, a patrol officer who responded to the call swam to the submerged vehicle a found the deceased woman inside.
A crime scene was established, and the department's detective division is currently investigating the circumstances of why the car was in the water and the cause of death of the woman.
At this time, it appears to be non-criminal in nature, the department said.
Anyone with information is urged to call the Riverhead Police Department at 631-727-4500.
All calls will be kept confidential.
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