The best way to cool off during a summer scorcher is a sweet refreshing treat. This is the best recipe I've found for watermelon lemonade - my go to poolside drink.
4 cups blended and strained watermelon
1.5 cups fresh lemon juice
1.5 cups sugar (simmer in a pan with the watermelon til dissolved)
2 liter sparkling water
Once the watermelon/sugar mixture has cooled, add the lemon juice and water. Serve over ice with lemon slices for garnish. Also works well in a punch bowl!