In a large bowl, combine the sliced cucumbers, tomato wedges, and red onion.
Add the chopped dill and parsley to the bowl.
In a small bowl or measuring cup, whisk together the red wine vinegar, olive oil, salt, and pepper until well combined.
Pour the dressing over the vegetables and herbs.
Gently toss everything together until evenly coated.
Let the salad sit at room temperature for at least 10 minutes to allow the flavors to meld.
Taste and adjust seasoning with more salt or pepper if needed before serving.