Wash the cucumbers and cherry tomatoes thoroughly under cold water.
Chop the cucumbers in half lengthwise, then slice them into half-moon shapes about ½ inch thick.
Halve the avocados, remove the pit, and scoop the flesh out with a spoon. Dice the avocado into bite-sized pieces.
In a large mixing bowl, combine the sliced cucumbers, diced avocados, chopped red onion, and halved cherry tomatoes.
In a small bowl, whisk together the olive oil, lime juice, salt, and pepper to create the dressing.
Pour the dressing over the salad mixture, then gently toss everything together until evenly coated.
Add the chopped cilantro and toss gently again to incorporate.
Serve immediately for the best flavor and texture.