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

Departing Civitavecchia, Italy on July 22, 2026, the Norwegian Cruise Line (NCL) ship Norwegian Viva runs this 9-night Greek Isles from Rome to Istanbul: Santorini, Athens & Malta sailing. It's a classic Mediterranean cruise. Travelers sailing in July can generally expect mild, changeable weather that can turn cool and wet. Ports of call include Civitavecchia, Italy, Salerno, Italy, Catania, Sicily, with 5 more along the way. Scroll the daily outlook below to pack smart for every port of call.

1. Day 1 — Wednesday, Jul 22, 2026 — Civitavecchia, Italy

   Civitavecchia, Italy is a scheduled port of call on day 1 of the 9-night Greek Isles from Rome to Istanbul: Santorini, Athens & Malta cruise on Norwegian Viva. Expected weather: clear with highs near 81°F.

2. Day 2 — Thursday, Jul 23, 2026 — Salerno, Italy

   Salerno, Italy is a scheduled port of call on day 2 of the 9-night Greek Isles from Rome to Istanbul: Santorini, Athens & Malta cruise on Norwegian Viva. Expected weather: clear with highs near 86°F.

3. Day 3 — Friday, Jul 24, 2026 — Catania, Sicily

   Catania, Sicily is a scheduled port of call on day 3 of the 9-night Greek Isles from Rome to Istanbul: Santorini, Athens & Malta cruise on Norwegian Viva. Expected weather: clear with highs near 83°F.

4. Day 4 — Saturday, Jul 25, 2026 — La Valletta, Malta

   La Valletta, Malta is a scheduled port of call on day 4 of the 9-night Greek Isles from Rome to Istanbul: Santorini, Athens & Malta cruise on Norwegian Viva. Expected weather: clear with highs near 79°F.

5. Day 5 — Monday, Jul 27, 2026 — Santorini, Greece

   Santorini, Greece is a scheduled port of call on day 5 of the 9-night Greek Isles from Rome to Istanbul: Santorini, Athens & Malta cruise on Norwegian Viva. Expected weather: clear with highs near 76°F.

6. Day 6 — Tuesday, Jul 28, 2026 — Piraeus, Greece

   Piraeus, Greece is a scheduled port of call on day 6 of the 9-night Greek Isles from Rome to Istanbul: Santorini, Athens & Malta cruise on Norwegian Viva. Expected weather: clear with highs near 85°F.

7. Day 7 — Wednesday, Jul 29, 2026 — Kusadasi, Turkey

   Kusadasi, Turkey is a scheduled port of call on day 7 of the 9-night Greek Isles from Rome to Istanbul: Santorini, Athens & Malta cruise on Norwegian Viva. Expected weather: clear with highs near 96°F.

8. Day 8 — Thursday, Jul 30, 2026 — Istanbul, Turkey

   Istanbul, Turkey is a scheduled port of call on day 8 of the 9-night Greek Isles from Rome to Istanbul: Santorini, Athens & Malta cruise on Norwegian Viva. Expected weather: clear with highs near 85°F.