1/2 cup white sugar
1/2 cup water
3 strips orange zest
2 cups cubed seeded watermelon
3/4 cup white tequila
1/4 cup lime juice
Salt or sugar for rimming glasses (optional)
1 lime, cut into wedges
2 cups crushed ice, or as needed
Bring ½ cup sugar and water to boil. Stir until sugar is dissolved. Remove from heat and allow to cool.
Place watermelon in a blender or food processor and puree.
Stir puree into a large pitcher with simple syrup, tequila and lime juice.
Place a small amount of salt or sugar into a saucer. Rub edge of margarita glasses with a lime wedge to moisten and dip rim into salt or sugar.
Fill glasses with crushed ice, pour margarita mixture into glasses and garnish with lime wedges to serve.