How bad does the port of embarkation have to be before a cruise is cancelled?

[Sailfish]

We are from Northern California and cruiing out Port Canaveral on July 7th and again from Tampa on July 14th. How bad does the port of embarkation have to be before a cruise is cancelled or postponed? We have never cruised in the summer before and understand that ships sail around storms and modify their itineraries. But I was just wondering what happens if the weather gets really bad.

 

Thanks.

 

Suzi