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Loading Travel Forecast…Loading Travel Forecast…Loading Travel Forecast…Departing Piraeus, Greece on September 22, 2026, the RSSC Cruises ship Seven Seas Navigator runs this 10-night Mysteries & Marvels Athens (Piraeus) To Istanbul sailing. It's a classic Mediterranean cruise. Travelers sailing in September can generally expect mild, changeable weather that can turn cool and wet. Ports of call include Piraeus, Greece, Gythion, Greece, Katakolon, Greece, with 5 more along the way. Scroll the daily outlook below to pack smart for every port of call.
Piraeus, Greece is a scheduled port of call on day 1 of the 10-night Mysteries & Marvels Athens (Piraeus) To Istanbul cruise on Seven Seas Navigator. Expected weather: partially cloudy with highs near 86°F.
Gythion, Greece is a scheduled port of call on day 2 of the 10-night Mysteries & Marvels Athens (Piraeus) To Istanbul cruise on Seven Seas Navigator. Expected weather: partially cloudy with highs near 78°F.
Katakolon, Greece is a scheduled port of call on day 3 of the 10-night Mysteries & Marvels Athens (Piraeus) To Istanbul cruise on Seven Seas Navigator. Expected weather: partially cloudy with highs near 77°F.
Day 4 of 11 is a day at sea aboard Seven Seas Navigator, cruising between ports on the Mysteries & Marvels Athens (Piraeus) To Istanbul itinerary.
Kotor, Montenegro is a scheduled port of call on day 5 of the 10-night Mysteries & Marvels Athens (Piraeus) To Istanbul cruise on Seven Seas Navigator. Expected weather: partially cloudy with highs near 75°F.
Hvar, Croatia is a scheduled port of call on day 6 of the 10-night Mysteries & Marvels Athens (Piraeus) To Istanbul cruise on Seven Seas Navigator. Expected weather: partially cloudy with highs near 72°F.
Day 7 of 11 is a day at sea aboard Seven Seas Navigator, cruising between ports on the Mysteries & Marvels Athens (Piraeus) To Istanbul itinerary.
Mykonos, Greece is a scheduled port of call on day 8 of the 10-night Mysteries & Marvels Athens (Piraeus) To Istanbul cruise on Seven Seas Navigator. Expected weather: clear with highs near 72°F.
Kusadasi, Turkey is a scheduled port of call on day 9 of the 10-night Mysteries & Marvels Athens (Piraeus) To Istanbul cruise on Seven Seas Navigator. Expected weather: clear with highs near 83°F.
Istanbul, Turkey is a scheduled port of call on day 10 of the 10-night Mysteries & Marvels Athens (Piraeus) To Istanbul cruise on Seven Seas Navigator. Expected weather: partially cloudy with highs near 70°F.
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