Place the watermelon chunks into a blender. Blend on high until completely pureed, with a smooth, uniform consistency and no visible chunks.
Add the freshly squeezed lime juice and salt to the blender. Pulse a few times to incorporate evenly, ensuring the mixture is well-balanced and slightly tangy.
Pour the mixture into a mixing bowl and taste to adjust seasoning if needed. Cover the bowl with plastic wrap or a lid.
Place the bowl in the freezer. Every 30 minutes, use a fork to scrape and stir the mixture to break up ice crystals, repeating this process 3-4 times until the sorbet reaches a firm, scoopable consistency.
Once fully frozen and smooth, serve the sorbet in bowls or glasses. Optionally, garnish with a small wedge of lime or a sprig of mint for presentation.