Combine the cubed watermelon, Moscato wine, vodka, pineapple juice, and simple syrup in a large pitcher.

Stir the mixture well until the ingredients are thoroughly combined.

Add the lime slices and gently stir them into the mixture.

Chill the pitcher in the refrigerator for at least 2 hours to let the flavors meld together.

Just before serving, add club soda to the pitcher and stir.

Fill glasses with ice and pour the sangria over the ice.