Weather can be absolutely beautiful and the seas calm as can be and still not be able to dock.
Happened to us in Grand Turk on the Splendor (before she went West).
The Captain explained that ships of that size (remember the Dream is even bigger) act like huge SAILS and even when the weather is otherwise wonderful....the winds can be an invisible culprit.
I know Carnival hates missing Roatan....they make some serious money on Shore Excursions and at that new beach when they dock.
COMPLETES THE FLEET
If it is Carnival and it floats....we have sailed it!
Hubby ... DIAMOND (every ship except the Carnivale)
Me ... DIAMOND (every ship starting with the Tropicale)
20 year old son ... DIAMOND (every ship starting with the Tropicale...he is the only DOUBLE Milestone under the age of 21)
24 year old son ... DIAMOND