Hi indeed, and Welcome to Cruise-Chat!
Please follow up with the cruise line and the ship's scheduled arrival time. This will help determine what services would be available.
Like Jim I took a tour after when I had a late flight. They kept our luggage on the bus and delivered us and the luggage to the airport.
Barrachina's also offers free luggage storage. Click on the Old San Juan location then the free services for more information.
Welcome Aboard!