How to Juice a Watermelon if you don't have a juicer- After much trial and error, I find that it's best to cut the rind off the melon and cut into chunks and place them in a blender. I use the "puree" function to get the best results, I then strain the pureed mixture using a fine mesh strainer, this gets rid of the pulp. I find this to be the easiest, least messy way to get the juice.