A shade assembly for personal watercraft to provide shade for the user from direct exposure of at least some sunlight. The shade assembly comprises a shade top, a front fixing structure, and a rear supporting structure. The shade top is designed to be attached to the front fixing structure and the rear supporting structure to create a shade that extends over the user. The front fixing structure comprises two or more fasteners to securely attach the shade top to the steering control handle or two or more supporting pillars, while the rear supporting structure comprises two or more supporting pillars to be fixed on the aft side of the personal watercraft. This shade assembly provides a simple and efficient solution to protect the user of personal watercraft from harmful sun exposure.