Hardiman said the storm-related headwinds to the cruise line operators includes sailings that were cancelled because ships were unable to get new passengers. Also he said there were cases of ships being unable to drop off passengers at the end of their regularly scheduled trips.
"Since these ships stayed at sea, while they were not able to recognize the revenues associated with the cancelled trips, they were incurring the vast majority of the costs associated with the cancelled voyages," he said.
According to Hardiman, average pricing growth for Royal Caribbean across its "entire 0-18 month booking curve was up 1 percent in August, a sequential acceleration from July's 4 percent decline." He said Nowegian's pricing in the same booking period for August was up about 6 percent.
For Carnival, meantime, he said the cruise line had a 2 percent year-over-year pricing growth in August, which he said was "slightly" ahead of the July trend.
"Based on our analysis of the ships impacted by the recent hurricanes off of Texas and Florida, we are modeling a small but material headwind, albeit one that we believe to be inconsequential in the broader context," the analyst said.
As for earnings per share impact, Hardiman estimates the two hurricanes will represent a 3-cent haircut to Carnival's bottom line for the full year, and his 2017 EPS forecast is for $3.76 (Thomson Reuters' Street consensus is $3.74). He said that impact will occur "mainly 4Q but a small amount in 3Q."
For Royal Caribbean, the analyst estimates the full-year EPS impact from the hurricane headwinds will be 7 cents per share, bringing the firm's 2017 estimate to $7.36 (Street EPS consensus is $7.44). And for Norwegian the forecast is for a 2 cent per share headwind, resulting in the research firm's 2017 EPS forecast dropping to $4.01 (the Street's mean is $3.99).
Meantime, Carnival tweeted today that the Port of Tampa reopened and its Carnival Paradise ship will dock there Wednesday morning. Also it said the Port of Miami "remains closed" although Norwegian Cruise Line said its Norwegian Escape ship is scheduled to arrive at the Miami port complex Wednesday morning.
CNBC reached out to the Port of Miami for further comment but a tweet from the complex indicated that it was open. The Port of Miami is the headquarters for five cruise lines.