Mooring cleats are mounted on the decks of watercraft and piers adjacent to the water for tying watercraft to piers and to other watercraft. Illumination is provided by forming an elongated groove in the top of the cleat bar center portion or in the cleat housing of a cleat that is pivotally attached to the cleat housing. An illumination member is mounted in the groove. The illumination member can include a tube of trinium gas or a plurality of light emitting diodes. Both light sources provide a visable line that can be seen during periods of reduced visibility. The viable line indicates the location of water and the direction of a safe movement.