Once in the area you should not loose the opportunity to visit the amaizing island of Capri. We recommend private boat tours in small groups or just you and your family/friends.
The tours usual are as follows:
Pickup at Hotel in Sorrento (or elsewhere)in the morning. Drive to the port and start with the boat in direction to the island along the Sorrento Coast. Arrived at the island possibility to stop and get into teh blue grotto (the entrance fees in the blue grotto are not inlcudet as you have to get into an other really small boat to reach into teh cave).
After that turning around the island (island surrounding ) with stop at nice spots for swimming. Boats use to have also snorkeling equippment on board and offers a small snack , but you can also ask the skipper to bring you to a nice restaurant somewhere if you would prefere that .... You also will have the possibility to see other grottos as the white, green and nativity one...Capri is famous for its grottos.
You will have free time on the island to reach to capri center or Monte Solaro with the chair lift, the gardens or else.
Turn to Sorrento (or else) in the afternoon.
That would be the best way to enjoy a day at sea, swim in some of the most beautiful bays in the area and have time to visit the island without staying hole day in croud and heat!!!