The following is a list of long-stay parking lots where you can leave your car.
Secure parking lots in Porto Santo Stefano:
These are all paid parking lots. Average parking costs around 10 euros (price to be verified, as each has its own fee schedule). Parking lots are open from 7:00 a.m. until 8:00 p.m./9:00 p.m. (time to check with each individual parking lot).
For more information on parking in Porto Santo Stefano, you can consult the website of the Municipality of Monte Argentario