Posted August 12th, 2017, 01:36 PM
Last edited by euro cruiser; August 12th, 2017 at 01:47 PM
If the timing works for you, Alicost goes right from Molo Manfredi (where the cruise port is) to Positano at 8 AM and 8:40 AM, schedule here: http://www.alicost.it/en/orari-e-prezzi/
The problem is usually the return, Alicost's first return to Salerno doesn't arrive until 6:30 PM, which is often too late for cruise passengers. If that's the case you'd need to either return to Piazza Concordia and walk (about a mile and a half) or take the bus to the cruise port.
Piazza Concordia ferry schedule here: http://www.travelmar.it/it/orari
For specifics on whether your cruise line (I'm guessing Disney, based on the user name) offers a shuttle you might ask on the cruise line forum. I haven't heard of any ships offering this but they might.
There is a public bus that runs along the Lungomare that would cut the walking by more than half.