14-Night Cruise on Oceania SirenaMediterranean Mosaic Istanbul to Rome - Weather

Join Oceania Cruises's Oceania Sirena for a 14-night voyage on the Mediterranean Mosaic Istanbul to Rome route, setting out from Istanbul, Turkey on August 27, 2026. 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, Izmir, Turkey, Santorini, Greece, with 9 more along the way. The forecasts below break the weather down port by port.

1. Day 1 — Thursday, Aug 27, 2026 — Istanbul, Turkey

   Istanbul, Turkey is a scheduled port of call on day 1 of the 14-night Mediterranean Mosaic Istanbul to Rome cruise on Oceania Sirena. Expected weather: partially cloudy with highs near 82°F.

2. Day 2 — Saturday, Aug 29, 2026 — Izmir, Turkey

   Izmir, Turkey is a scheduled port of call on day 2 of the 14-night Mediterranean Mosaic Istanbul to Rome cruise on Oceania Sirena. Expected weather: clear with highs near 98°F.

3. Day 3 — Sunday, Aug 30, 2026 — Santorini, Greece

   Santorini, Greece is a scheduled port of call on day 3 of the 14-night Mediterranean Mosaic Istanbul to Rome cruise on Oceania Sirena. Expected weather: clear with highs near 77°F.

4. Day 4 — Monday, Aug 31, 2026 — Rhodes, Greece

   Rhodes, Greece is a scheduled port of call on day 4 of the 14-night Mediterranean Mosaic Istanbul to Rome cruise on Oceania Sirena. Expected weather: clear with highs near 82°F.

5. Day 5 — Tuesday, Sep 1, 2026 — Iraklion, Greece

   Iraklion, Greece is a scheduled port of call on day 5 of the 14-night Mediterranean Mosaic Istanbul to Rome cruise on Oceania Sirena. Expected weather: clear with highs near 88°F.

6. Day 6 — Thursday, Sep 3, 2026 — Dubrovnik, Croatia

   Dubrovnik, Croatia is a scheduled port of call on day 6 of the 14-night Mediterranean Mosaic Istanbul to Rome cruise on Oceania Sirena. Expected weather: partially cloudy with highs near 80°F.

7. Day 7 — Friday, Sep 4, 2026 — Kotor, Montenegro

   Kotor, Montenegro is a scheduled port of call on day 7 of the 14-night Mediterranean Mosaic Istanbul to Rome cruise on Oceania Sirena. Expected weather: partially cloudy with highs near 82°F.

8. Day 8 — Saturday, Sep 5, 2026 — Sarande, Albania

   Sarande, Albania is a scheduled port of call on day 8 of the 14-night Mediterranean Mosaic Istanbul to Rome cruise on Oceania Sirena. Expected weather: partially cloudy with highs near 81°F.

9. Day 9 — Sunday, Sep 6, 2026 — Katakolon, Greece

   Katakolon, Greece is a scheduled port of call on day 9 of the 14-night Mediterranean Mosaic Istanbul to Rome cruise on Oceania Sirena. Expected weather: clear with highs near 82°F.

10. Day 10 — Tuesday, Sep 8, 2026 — Giardini-Naxos, Sicily

    Giardini-Naxos, Sicily is a scheduled port of call on day 10 of the 14-night Mediterranean Mosaic Istanbul to Rome cruise on Oceania Sirena. Expected weather: partially cloudy with highs near 80°F.

11. Day 11 — Wednesday, Sep 9, 2026 — Sorrento, Italy

    Sorrento, Italy is a scheduled port of call on day 11 of the 14-night Mediterranean Mosaic Istanbul to Rome cruise on Oceania Sirena. Expected weather: partially cloudy with highs near 77°F.

12. Day 12 — Thursday, Sep 10, 2026 — Civitavecchia, Italy

    Civitavecchia, Italy is a scheduled port of call on day 12 of the 14-night Mediterranean Mosaic Istanbul to Rome cruise on Oceania Sirena. Expected weather: partially cloudy with highs near 76°F.