1Add the cubed watermelon, chopped pineapple, lime juice, coconut water, and ice cubes into a blender.
Blend the ingredients on high speed until smooth and well combined.
Taste the smoothie and adjust the sweetness or tartness by adding more lime juice or a sweetener if desired.
Pour the smoothie into glasses and serve immediately.
Enjoy your refreshing Watermelon Pineapple Smoothie!