The islands are at their best in late spring (starting the end of April, mid-May) when the landscape is still green, although the sea has not yet fully warmed up for swimming, and when the tourist crowds have yet to arrive. Another option is early autumn (starting 1 September) when the sea is at its warmest and few tourists remain. Towards the end of November, many facilities close and storms are possible. If you must holiday at these times we will be happy to recommend to visit other boating destinations.
Avoid visiting the Cyclades by boat in July or August as the Cyclades bears the brunt of the ‘meltémi’ seasonal wind, which can make moving by boat and sailing uncomfortable and scatters sand and tablecloths.