In a large serving bowl, combine the sweet corn kernels, diced avocados, halved cherry tomatoes, diced red onion, and chopped cilantro.
In a separate small jar or bowl, whisk together the fresh lime juice, extra-virgin olive oil, sea salt, and black pepper.
Pour the lime dressing over the salad ingredients.
Toss the salad gently to evenly distribute the dressing and ingredients, being careful not to mash the avocado pieces.
Serve immediately at room temperature, or cover tightly and chill in the refrigerator for up to 2 hours before serving.