Place the diced watermelon in a blender and blend until smooth.

Strain the watermelon puree through a fine-mesh sieve into a bowl to remove any pulp, ensuring a smooth texture.

In a small saucepan, combine the water and sugar (or honey) over medium heat. Stir until the sugar is dissolved to create a simple syrup, then let it cool completely.

Mix the cooled simple syrup and lime juice into the watermelon puree, stirring thoroughly.

Pour the mixture into a shallow, freezer-safe container and freeze for 3-4 hours, stirring every 30 minutes to break up ice crystals and achieve a smooth consistency.

When fully frozen and smooth, scoop the sorbet into serving bowls or cones and enjoy!