It's rare, and if there is a cancellation because of wind it most likely won't stop the larger and more stable car ferries. As an alternative to the Highspeed Catamaran you can take a car ferry from Mykonos to Paros or Naxos and another from Paros to Santorini. What you don't want to do is take the I.J. SuperJet on a windy day. It's a lot smaller still than the Highspeed Cat and bobs in the water like a cork.
Thanks Lee!! Too bad all other forums didn't have an expert like you! Any idea if the ferry companies can foresee a cancellation a day in advance or even early morning on the day of departure? That would help to make alternate arrangements. What are the chances that there will be availability with the other companies on same day booking for early August?
Use www.openseas.gr to see what's available on your proposed travel dates. Some days have more to offer than others.
Unfortunately the comments on the catamarans are incorrect. The Hellenic Seaways Flyingcat and the Seajets consortium superjet catamarans are both small passenger vessels, on that run. Often confused with the much larger car ferries Hi-speed 1-5.
Sure the smaller ones are more likely to be affected by rough weather but very rough weather is quite rare and there is just no way of predicting this weeks in advance, so yes, the best way to find out is ask the day before or on the day (very early). I always buy tickets the day before as a matter of course, so finding out the day before anyway. It gives you the opportunity for an alternate route in your case either via Syros or Paros.
Thanks for the info!!! Any idea how long the route via Syros or Paros will take?
If you use the ferry website I gave you all will be revealed...............
We had multiple canceled ferries, between Santorini, Mykonos and Naxos, in the past couple of weeks. Being stuck on Mykonos was no fun after the first couple of nights. You need to be aware of the alternative options ahead of time. Often, we found travel agents would want to rebook for the following day, rather than book you on a slower, more reliable boat. Slower boats were cheaper and dirtier, so there is a trade-off. Also be aware that Mykonos Town has two ports, a few miles apart. Check you know which one your ferry leaves from!
It's impossible to know if and when the ferries are cancelled, but in September the winds start to pick up, so it's definitely a possibility (although rare). If you were planning on taking the H.S. FlyingCat #4 you should know that there are other options depending on which day of travel you have. Check this website for these options, but know that you might not like the travel times and also understand that some of the alternatives don't go to Heraklion which means getting from the alternative port to Heraklion by taxi or bus. Pay close attention to the "Till" dates to know if you can use the alternatives.
Any airplane ticket should be booked ahead, and especially with SkyExpress since the planes are so small.
Thanks for that, Lee - very helpful. Unfortunately, the only transport on the day we plan to leave - Monday, September 17 - is the catamaran. We'll just have to pray!