iLoveSea & wind
Meltemi Winds & Greek Ferries: When Boats Get Cancelled
Quick answer
The Meltemi is a strong, dry northerly wind that blows across the Aegean, mainly July to August. Fast catamarans are often cancelled from about Beaufort 6–7. Large conventional ferries usually keep sailing until Beaufort 8–9, when the port authority may ban sailings. In windy weeks, book the big ferry and leave a buffer day before your flight.
Beaufort guide for ferries
| Beaufort | Feels like | Fast catamaran | Big ferry |
|---|---|---|---|
| 0–4 | Calm to breezy | Runs normally | Runs normally |
| 5 | Choppy | Bumpy; seasickness likely | Comfortable |
| 6–7 | Rough | Often delayed or cancelled | Usually sails |
| 8 | Gale | Cancelled | May be held in port |
| 9+ | Strong gale | Cancelled | Sailing ban likely |
What to do
- Choose conventional ferries (big car ferries) for important legs in July and August.
- Leave one buffer day between your last island and an international flight.
- If your ferry is cancelled by the company, you're entitled to a refund or rebooking.
- Sit low and in the middle of the boat, look at the horizon and avoid the top deck.
FAQ
Which islands are most affected by the Meltemi?
The Cyclades, especially exposed crossings such as Mykonos, Tinos, Naxos and Paros, and the route to Santorini.
Who decides if ferries can sail?
The Hellenic Coast Guard (port authority) can ban sailings when winds get too strong.
Updated 2026-10. General planning guidance. Check with operators and local authorities.