10-Night Cruise on OosterdamAdriatic Allure: Croatia, Greek Isles & Istanbul - Weather

The Oosterdam sails a 10-night Adriatic Allure: Croatia, Greek Isles & Istanbul itinerary with HAL Cruises, departing Trieste, Italy on September 23, 2026. 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 Trieste, Italy, Rijeka, Croatia, Split, Croatia, with 5 more along the way. Use the day-by-day forecast below to plan what to pack for each stop.

1. Day 1 — Wednesday, Sep 23, 2026 — Trieste, Italy

   Trieste, Italy is a scheduled port of call on day 1 of the 10-night Adriatic Allure: Croatia, Greek Isles & Istanbul cruise on Oosterdam. Expected weather: partially cloudy with highs near 72°F.

2. Day 2 — Thursday, Sep 24, 2026 — Rijeka, Croatia

   Rijeka, Croatia is a scheduled port of call on day 2 of the 10-night Adriatic Allure: Croatia, Greek Isles & Istanbul cruise on Oosterdam. Expected weather: partially cloudy with highs near 70°F.

3. Day 3 — Friday, Sep 25, 2026 — Split, Croatia

   Split, Croatia is a scheduled port of call on day 3 of the 10-night Adriatic Allure: Croatia, Greek Isles & Istanbul cruise on Oosterdam. Expected weather: partially cloudy with highs near 72°F.

4. Day 4 — Sunday, Sep 27, 2026 — Santorini, Greece

   Santorini, Greece is a scheduled port of call on day 4 of the 10-night Adriatic Allure: Croatia, Greek Isles & Istanbul cruise on Oosterdam. Expected weather: clear with highs near 73°F.

5. Day 5 — Monday, Sep 28, 2026 — Bodrum, Turkey

   Bodrum, Turkey is a scheduled port of call on day 5 of the 10-night Adriatic Allure: Croatia, Greek Isles & Istanbul cruise on Oosterdam. Expected weather: clear with highs near 76°F.

6. Day 6 — Tuesday, Sep 29, 2026 — Kusadasi, Turkey

   Kusadasi, Turkey is a scheduled port of call on day 6 of the 10-night Adriatic Allure: Croatia, Greek Isles & Istanbul cruise on Oosterdam. Expected weather: clear with highs near 82°F.

7. Day 7 — Wednesday, Sep 30, 2026 — Istanbul, Turkey

   Istanbul, Turkey is a scheduled port of call on day 7 of the 10-night Adriatic Allure: Croatia, Greek Isles & Istanbul cruise on Oosterdam. Expected weather: partially cloudy with highs near 72°F.

8. Day 8 — Saturday, Oct 3, 2026 — Piraeus, Greece

   Piraeus, Greece is a scheduled port of call on day 8 of the 10-night Adriatic Allure: Croatia, Greek Isles & Istanbul cruise on Oosterdam. Expected weather: partially cloudy with highs near 81°F.