Using a sharp knife and cutting board, peel and cut the watermelon into roughly 2-inch cubes, removing any rinds or seeds.
Add the watermelon cubes into the blender jar.
Blend on high speed until the mixture is smooth and frothy, approximately 30 seconds to 1 minute.
Place a fine mesh strainer or sieve over a large bowl and pour the blended watermelon through it.
Use a spoon or spatula to press the pulp, extracting as much liquid as possible. Discard or compost the remaining pulp.
Pour the strained watermelon juice into glasses and serve immediately for a crisp, refreshing experience.
