It takes about 90 minutes to cruise around the entire island of Capri on board a smaller craft. If you want to take in the island, stop for free time to swim and snorkel in the most beautiful coves, snap a few photos under the Faraglioni, and visit the Blue Grotto, consider that it will take about three to four hours with a small-group tour or private boat tour of Capri.
To really unwind and explore the island's coastline at your own pace, consider a full-day tour of the island that often includes time on land to stroll through the Piazzetta in Capri and the quiet center of Anacapri. If you just have an hour or two, opt for a quick sunset boat trip to the Faraglioni that includes a Prosecco or Limoncello toast on board.