Step 1: Prepare the watermelon by cutting it into uniform 1-inch cubes and place them in a large mixing bowl.
Step 2: Gently wash the strawberries, blueberries, and raspberries. Pat them completely dry with a paper towel. Slice the strawberries and add all berries to the bowl with the watermelon.
Step 3: In a small jar or bowl, whisk together the fresh lime juice, honey, and chopped mint until well combined.
Step 4: Drizzle the dressing over the fruit mixture. Using a large spoon or spatula, very gently fold the fruit to ensure even coating without crushing the berries.
Step 5: Serve the watermelon berry fruit salad immediately, or chill in the refrigerator for up to 30 minutes for maximum refreshment.