The incident happened sometime between Monday, Aug. 2, and Tuesday, Aug. 3, at about 5:40 p.m., according to the Nassau County Police Department.
NCPD said the temple is located at 383 Jericho Turnpike in Floral Park.
A ladder was reportedly found leaning against the outside of the building, which allowed the unknown person to enter through a window.
Police said the graffiti was found on the roof, windows, and the fence in black spray paint.
Anyone with information about the incident is asked to contact authorities at 1-800-244-TIPS.
Click here to follow Daily Voice Brentwood and receive free news updates.