WSHY1803 is a high quality, red fleshed seedless watermelon variety that has a dark colored, medium thick rind. The vigorous plants have good canopy cover that protects the round shaped fruit from sun burning and fading. The 20-22 lb. fruit have an appetizing red flesh that has a fine texture and sweetness. The variety has been noted to have high yield potential and a uniform shape and size. Intermediate resistance to Anthracnose.