There comes a moment on most vacations. There's a summer storm -- it's warm enough that, at most, you need your lightest jacket, so getting wet doesn't actually bother you that much. The lightning is beautiful, especially if there's a body of water nearby.
Ideally, there's a spot. A porch, a patio, a gazebo, a stable tent. An underhang of a roof will do; I made that work a few times as a kid, when the wind blew in the right direction. An enclosed sunroom will work in a pinch. The point is to be outdoors but covered, or indoors but exposed. You get some of the wind, but very little of the rain.
Grab that lightweight jacket I mentioned, and the doorstop of a book you brought along, and, depending on your circumstances, a cup of tea or a glass of lemonade or a bottle of beer.
Now, sit in your dry spot. Enjoy the cool wind after a hot, humid day. Be soothed by the patter of the rain. And, just when things get dull, be thrilled by the beauty and far-off danger of the lightning, especially if it's over the ocean you are absolutely not in.
It just doesn't get much better than that.