How to Cut Watermelon Note from Cheri: The National Watermelon Promotion Board provided these easy photo instructions on how to watermelon into cubes or wedges. More On Watermelons! Click here lots more information about watermelon -- recipes, carving instructions, fun facts, nutritional data and more.   Here's how to cut watermelon wedges Cut watermelon in half lenghtwise. Cut each half in half again lengthwise. Cut each quarter into slices as pictured above. To Cut Watermelon Cubes   To De-Seed a Watermelon: Cut watermelon in half, then in quarters. Cut through the flesh of the melon along the seed line with a pairing knife. Now, lift off the piece of the melon you just cut. Using a fork, scrape the seeds from the piece you just removed and the remaining flesh on the rind. Handy Cutting Surface Jumbo cutting mats -- a thin, pliable mat, rolls up for easy transportation to picnics, BBQs, camping the beach and other outdoor dining events, but equally handy in your own home or RV kitchen. Pop in the dishwasher to clean.