Cut the watermelon into 1-inch cubes, removing any seeds if necessary.
Slice the cucumbers into half-moon pieces about 1/4-inch thick.
Cube the feta cheese into small pieces using a sharp knife.
Roughly chop the fresh mint leaves.
In a small bowl, whisk together the lime juice, olive oil, salt, and black pepper until well combined.
Place the watermelon, cucumber, feta, and mint in a large mixing bowl.
Pour the dressing over the salad ingredients.
Gently toss everything together until evenly coated with dressing.
Let the salad sit at room temperature for 5-10 minutes before serving to allow flavors to meld.
Taste and adjust seasoning with additional salt or pepper if needed.
