There are usually two ferries a week between Sinos and Paros and Paros to Sifnos, and a number of boats every day between Paros and Naxos and back.The route I'd choose would be Piraeus ,Sifnos, Paros Naxos and back to Piraeus. No doubt there will be up to date ferry schedules in the New Year. Try Greek Travel Pages.
Thanks for the advice. That looks our best route. Is there enough to see and do on Sifnos to last seven days?
You could always have a couple of days on Serifos, there are usually one or two ferries a day from Piraeus which carry on to Sifnos, which is about one hour further on from Serifos.Edited: 24 November 2009, 16:22
I've spent 15 and 18 days in Sifnos and both times (once as a child and then as a teenager) I had a great time. Sifnos has several great beaches, good nightlife and tens of good restaurants to try.
We spent three weeks on Sifnos in July-August thirty years ago and could not wait to go back the next year! After that we went every year, and now I live in Athens I can get there easily and I go for weeks at a time, in April, May-June and September. So yes – there is plenty to do! Now in the summer there are lots of interesting bars and nightlife, not a huge number of beaches, but good ones with sand and rocks, and there are really great walks, if that appeals to you and it's not too hot in July. Also, in July your visit will almost certainly coincide with one of the local festivals - visitors are always welcome. If you need more specific info I can probably help – do send me a pm if you like.
If it's prior to 20th July, and you;re not set on a specific hotel, then you could "play it be ear" but no later for the western Cyclades. Demand is great and accommodation possibilities low.
Also as advised, it's too early for ferry schedules which are never fixed...
the western Cyclades are getting better linked to the central Cyclades, as each year passes, so you never know re-ferry schedules next year, but most probably there will be alternative day connections in July,
Many thanks to everyone for all the sound advice. We've got the island hopping bug after many years of holidays in the more popular Greek islands such as Skiathos, Corfu, Samos, Ios, Crete, Kos, Kephalonia, Thassos, Lesvos as well as a couple of sailing holidays.
Ios this year was a bit too young for our liking but our teenage kids had a ball. Next year we'll be on our own so we want a more peaceful time exploring the beaches and enjoying the food and culture.
The heat won't bother us as we live in Qatar although I notice the sun is more powerful in the Med than it is here.