21-Night Cruise on Sun PrincessThe Best of the Mediterranean - Weather

The Sun Princess sails a 21-night The Best of the Mediterranean itinerary with Princess Cruises, departing Piraeus, Greece on May 16, 2027. It's a classic Mediterranean cruise. Travelers sailing in May can generally expect mild, changeable weather that can turn cool and wet. Ports of call include Piraeus, Greece, Santorini, Greece, Bar, Montenegro, with 13 more along the way. Use the day-by-day forecast below to plan what to pack for each stop.

1. Day 1 — Sunday, May 16, 2027 — Piraeus, Greece

   Piraeus, Greece is a scheduled port of call on day 1 of the 21-night The Best of the Mediterranean cruise on Sun Princess. Expected weather: partially cloudy with highs near 80°F.

2. Day 2 — Monday, May 17, 2027 — Santorini, Greece

   Santorini, Greece is a scheduled port of call on day 2 of the 21-night The Best of the Mediterranean cruise on Sun Princess. Expected weather: partially cloudy with highs near 67°F.

3. Day 3 — Wednesday, May 19, 2027 — Bar, Montenegro

   Bar, Montenegro is a scheduled port of call on day 3 of the 21-night The Best of the Mediterranean cruise on Sun Princess. Expected weather: partially cloudy with highs near 68°F.

4. Day 4 — Thursday, May 20, 2027 — Corfu, Greece

   Corfu, Greece is a scheduled port of call on day 4 of the 21-night The Best of the Mediterranean cruise on Sun Princess. Expected weather: partially cloudy with highs near 69°F.

5. Day 5 — Friday, May 21, 2027 — Messina, Sicily

   Messina, Sicily is a scheduled port of call on day 5 of the 21-night The Best of the Mediterranean cruise on Sun Princess. Expected weather: partially cloudy with highs near 73°F.

6. Day 6 — Sunday, May 23, 2027 — Barcelona, Spain

   Barcelona, Spain is a scheduled port of call on day 6 of the 21-night The Best of the Mediterranean cruise on Sun Princess. Expected weather: partially cloudy with highs near 67°F.

7. Day 7 — Tuesday, May 25, 2027 — Marseille, France

   Marseille, France is a scheduled port of call on day 7 of the 21-night The Best of the Mediterranean cruise on Sun Princess. Expected weather: partially cloudy with highs near 66°F.

8. Day 8 — Wednesday, May 26, 2027 — Ajaccio, Corsica

   Ajaccio, Corsica is a scheduled port of call on day 8 of the 21-night The Best of the Mediterranean cruise on Sun Princess. Expected weather: partially cloudy with highs near 74°F.

9. Day 9 — Thursday, May 27, 2027 — Genoa, Italy

   Genoa, Italy is a scheduled port of call on day 9 of the 21-night The Best of the Mediterranean cruise on Sun Princess. Expected weather: partially cloudy with highs near 72°F.

10. Day 10 — Friday, May 28, 2027 — La Spezia, Italy

    La Spezia, Italy is a scheduled port of call on day 10 of the 21-night The Best of the Mediterranean cruise on Sun Princess. Expected weather: partially cloudy with highs near 68°F.

11. Day 11 — Sunday, May 30, 2027 — Civitavecchia, Italy

    Civitavecchia, Italy is a scheduled port of call on day 11 of the 21-night The Best of the Mediterranean cruise on Sun Princess. Expected weather: partially cloudy with highs near 69°F.

12. Day 12 — Monday, May 31, 2027 — Naples, Italy

    Naples, Italy is a scheduled port of call on day 12 of the 21-night The Best of the Mediterranean cruise on Sun Princess. Expected weather: partially cloudy with highs near 70°F.

13. Day 13 — Wednesday, Jun 2, 2027 — Chania, Crete

    Chania, Crete is a scheduled port of call on day 13 of the 21-night The Best of the Mediterranean cruise on Sun Princess. Expected weather: partially cloudy with highs near 75°F.

14. Day 14 — Friday, Jun 4, 2027 — Kusadasi, Turkey

    Kusadasi, Turkey is a scheduled port of call on day 14 of the 21-night The Best of the Mediterranean cruise on Sun Princess. Expected weather: partially cloudy with highs near 83°F.

15. Day 15 — Saturday, Jun 5, 2027 — Mykonos, Greece

    Mykonos, Greece is a scheduled port of call on day 15 of the 21-night The Best of the Mediterranean cruise on Sun Princess. Expected weather: clear with highs near 71°F.

16. Day 16 — Sunday, Jun 6, 2027 — Piraeus, Greece

    Piraeus, Greece is a scheduled port of call on day 16 of the 21-night The Best of the Mediterranean cruise on Sun Princess. Expected weather: partially cloudy with highs near 86°F.