Gather the ingredients.Clean the grates. Prepare a medium-high (400 F to 425 F) indirect gas or charcoal grill fire.
Slice the avocados in half lengthwise. Remove the pit, and immediately cover the flesh with fresh lime juice.
Brush a small amount of olive oil onto the surface of each avocado and sprinkle with salt.
Oil the grates and place the avocados cut side down over indirect heat on the grill.
Grill with the lid open for 4 to 6 minutes until the avocado becomes slightly tender when gently squeezed with tongs. The skin should be crisp and the flesh will have grill marks.
Remove from the grill. Serve with a more lime juice and salt, if desired.