Prepare the ingredients by dicing the pineapple and cucumber, chopping the red onion and cilantro, and juicing the lime.
In a large bowl, combine the diced pineapple, cucumber, and red onion.
Drizzle the lime juice over the mixture and add the chopped cilantro, salt, and pepper.
Gently toss the salad to combine all the ingredients thoroughly.
Let the salad sit for about 10 minutes to allow the flavors to meld before serving.
Serve the pineapple cucumber salad chilled or at room temperature for an ideal refreshing dish.