10-Night Cruise on Norwegian VivaGreek Isles from Istanbul to Rome: Santorini, Athens & Mykonos - Weather

The Norwegian Viva sails a 10-night Greek Isles from Istanbul to Rome: Santorini, Athens & Mykonos itinerary with Norwegian Cruise Line (NCL), departing Istanbul, Turkey on August 18, 2027. It's a classic Mediterranean cruise. Travelers sailing in August can generally expect mild, changeable weather that can turn cool and wet. Ports of call include Istanbul, Turkey, Kusadasi, Turkey, Santorini, Greece, with 7 more along the way. Use the day-by-day forecast below to plan what to pack for each stop.

1. Day 1 — Wednesday, Aug 18, 2027 — Istanbul, Turkey

   Istanbul, Turkey is a scheduled port of call on day 1 of the 10-night Greek Isles from Istanbul to Rome: Santorini, Athens & Mykonos cruise on Norwegian Viva. Expected weather: clear with highs near 84°F.

2. Day 2 — Thursday, Aug 19, 2027 — Kusadasi, Turkey

   Kusadasi, Turkey is a scheduled port of call on day 2 of the 10-night Greek Isles from Istanbul to Rome: Santorini, Athens & Mykonos cruise on Norwegian Viva. Expected weather: clear with highs near 95°F.

3. Day 3 — Friday, Aug 20, 2027 — Santorini, Greece

   Santorini, Greece is a scheduled port of call on day 3 of the 10-night Greek Isles from Istanbul to Rome: Santorini, Athens & Mykonos cruise on Norwegian Viva. Expected weather: clear with highs near 78°F.

4. Day 4 — Saturday, Aug 21, 2027 — Mykonos, Greece

   Mykonos, Greece is a scheduled port of call on day 4 of the 10-night Greek Isles from Istanbul to Rome: Santorini, Athens & Mykonos cruise on Norwegian Viva. Expected weather: clear with highs near 77°F.

5. Day 5 — Sunday, Aug 22, 2027 — Piraeus, Greece

   Piraeus, Greece is a scheduled port of call on day 5 of the 10-night Greek Isles from Istanbul to Rome: Santorini, Athens & Mykonos cruise on Norwegian Viva.

6. Day 6 — Monday, Aug 23, 2027 — Katakolon, Greece

   Katakolon, Greece is a scheduled port of call on day 6 of the 10-night Greek Isles from Istanbul to Rome: Santorini, Athens & Mykonos cruise on Norwegian Viva. Expected weather: clear with highs near 85°F.

7. Day 7 — Tuesday, Aug 24, 2027 — La Valletta, Malta

   La Valletta, Malta is a scheduled port of call on day 7 of the 10-night Greek Isles from Istanbul to Rome: Santorini, Athens & Mykonos cruise on Norwegian Viva. Expected weather: clear with highs near 81°F.

8. Day 8 — Wednesday, Aug 25, 2027 — Catania, Sicily

   Catania, Sicily is a scheduled port of call on day 8 of the 10-night Greek Isles from Istanbul to Rome: Santorini, Athens & Mykonos cruise on Norwegian Viva. Expected weather: clear with highs near 85°F.

9. Day 9 — Thursday, Aug 26, 2027 — Salerno, Italy

   Salerno, Italy is a scheduled port of call on day 9 of the 10-night Greek Isles from Istanbul to Rome: Santorini, Athens & Mykonos cruise on Norwegian Viva. Expected weather: partially cloudy with highs near 87°F.

10. Day 10 — Friday, Aug 27, 2027 — Civitavecchia, Italy

    Civitavecchia, Italy is a scheduled port of call on day 10 of the 10-night Greek Isles from Istanbul to Rome: Santorini, Athens & Mykonos cruise on Norwegian Viva. Expected weather: partially cloudy with highs near 78°F.