Maybe it doesn't happen to you. Ever.
Maybe you are an expert in picking sweet, good watermelon.
I am not. So, it happens to me once in a while that I pick up a watermelon which is not sweet at all. Just blaaaaaaaaaaaaand.
This is not a recipe either. I made this and was trying to practice couple of settings on my camera. You can call it a photography exercise if you may. Trust me when I say I don't do this often even though I should. So, here is something to cool you in this heat visually.
One Year back - Basic White Bread
Watermelon - chopped into cubes and measured - 9 cups
Water - 2 cups
Sugar - 1/2 - 1 cup (as per taste and as per the sweetness in the watermelon)
Limes - 4 juiced
Ice - optional
Blend the watermelon cubes in the blender. Add sugar, lime juice, water, stir. Serve with ice if desired.
Cool thing to do with this: Freeze in popsicle molds.