On VOF (Oct 1st) we had great weather.
Two weeks later on SSS (Oct 15th but virtually the same itinerary) Venice was clear, cold and windy. We had rain in Sorrento, and it was so rough we had to cancel our scheduled overnight and sail for calmer harbors. All of the excursions to Pompeii and Herculeneum were cancelled as the roads were washed out. We also were not able to land in Naxos for Taormina and had to find another port.
Expect some changeable weather...
