23-Night Cruise on Oceania RegattaMediterranean Constellation Lisbon to Monte Carlo - Weather

The Oceania Regatta sails a 23-night Mediterranean Constellation Lisbon to Monte Carlo itinerary with Oceania Cruises, departing Lisbon, Portugal on June 24, 2026. It's a classic Mediterranean cruise. Travelers sailing in June can generally expect mild, changeable weather that can turn cool and wet. Ports of call include Lisbon, Portugal, Portimao, Portugal, Cadiz, Spain, with 16 more along the way. Use the day-by-day forecast below to plan what to pack for each stop.

1. Day 1 — Wednesday, Jun 24, 2026 — Lisbon, Portugal

   Lisbon, Portugal is a scheduled port of call on day 1 of the 23-night Mediterranean Constellation Lisbon to Monte Carlo cruise on Oceania Regatta. Expected weather: partially cloudy with highs near 77°F.

2. Day 2 — Thursday, Jun 25, 2026 — Portimao, Portugal

   Portimao, Portugal is a scheduled port of call on day 2 of the 23-night Mediterranean Constellation Lisbon to Monte Carlo cruise on Oceania Regatta. Expected weather: clear with highs near 93°F.

3. Day 3 — Friday, Jun 26, 2026 — Cadiz, Spain

   Cadiz, Spain is a scheduled port of call on day 3 of the 23-night Mediterranean Constellation Lisbon to Monte Carlo cruise on Oceania Regatta. Expected weather: partially cloudy with highs near 80°F.

4. Day 4 — Sunday, Jun 28, 2026 — Tarragona, Spain

   Tarragona, Spain is a scheduled port of call on day 4 of the 23-night Mediterranean Constellation Lisbon to Monte Carlo cruise on Oceania Regatta. Expected weather: clear with highs near 79°F.

5. Day 5 — Monday, Jun 29, 2026 — Toulon, France

   Toulon, France is a scheduled port of call on day 5 of the 23-night Mediterranean Constellation Lisbon to Monte Carlo cruise on Oceania Regatta. Expected weather: clear with highs near 93°F.

6. Day 6 — Tuesday, Jun 30, 2026 — Livorno, Italy

   Livorno, Italy is a scheduled port of call on day 6 of the 23-night Mediterranean Constellation Lisbon to Monte Carlo cruise on Oceania Regatta. Expected weather: partially cloudy with highs near 87°F.

7. Day 7 — Wednesday, Jul 1, 2026 — Civitavecchia, Italy

   Civitavecchia, Italy is a scheduled port of call on day 7 of the 23-night Mediterranean Constellation Lisbon to Monte Carlo cruise on Oceania Regatta. Expected weather: clear with highs near 93°F.

8. Day 8 — Thursday, Jul 2, 2026 — Positano, Italy

   Positano, Italy is a scheduled port of call on day 8 of the 23-night Mediterranean Constellation Lisbon to Monte Carlo cruise on Oceania Regatta. Expected weather: clear with highs near 80°F.

9. Day 9 — Saturday, Jul 4, 2026 — Gythion, Greece

   Gythion, Greece is a scheduled port of call on day 9 of the 23-night Mediterranean Constellation Lisbon to Monte Carlo cruise on Oceania Regatta. Expected weather: partially cloudy with highs near 85°F.

10. Day 10 — Sunday, Jul 5, 2026 — Piraeus, Greece

    Piraeus, Greece is a scheduled port of call on day 10 of the 23-night Mediterranean Constellation Lisbon to Monte Carlo cruise on Oceania Regatta. Expected weather: partially cloudy with highs near 88°F.

11. Day 11 — Monday, Jul 6, 2026 — Mykonos, Greece

    Mykonos, Greece is a scheduled port of call on day 11 of the 23-night Mediterranean Constellation Lisbon to Monte Carlo cruise on Oceania Regatta. Expected weather: clear with highs near 81°F.

12. Day 12 — Tuesday, Jul 7, 2026 — Istanbul, Turkey

    Istanbul, Turkey is a scheduled port of call on day 12 of the 23-night Mediterranean Constellation Lisbon to Monte Carlo cruise on Oceania Regatta. Expected weather: clear with highs near 83°F.

13. Day 13 — Thursday, Jul 9, 2026 — Canakkale, Turkey

    Canakkale, Turkey is a scheduled port of call on day 13 of the 23-night Mediterranean Constellation Lisbon to Monte Carlo cruise on Oceania Regatta. Expected weather: rain, partially cloudy with highs near 82°F.

14. Day 14 — Friday, Jul 10, 2026 — Kusadasi, Turkey

    Kusadasi, Turkey is a scheduled port of call on day 14 of the 23-night Mediterranean Constellation Lisbon to Monte Carlo cruise on Oceania Regatta. Expected weather: clear with highs near 92°F.

15. Day 15 — Saturday, Jul 11, 2026 — Marmaris, Turkey

    Marmaris, Turkey is a scheduled port of call on day 15 of the 23-night Mediterranean Constellation Lisbon to Monte Carlo cruise on Oceania Regatta. Expected weather: clear with highs near 89°F.

16. Day 16 — Sunday, Jul 12, 2026 — Iraklion, Greece

    Iraklion, Greece is a scheduled port of call on day 16 of the 23-night Mediterranean Constellation Lisbon to Monte Carlo cruise on Oceania Regatta. Expected weather: clear with highs near 87°F.

17. Day 17 — Tuesday, Jul 14, 2026 — Tunis, Tunisia

    Tunis, Tunisia is a scheduled port of call on day 17 of the 23-night Mediterranean Constellation Lisbon to Monte Carlo cruise on Oceania Regatta. Expected weather: partially cloudy with highs near 108°F.

18. Day 18 — Wednesday, Jul 15, 2026 — Palermo, Sicily

    Palermo, Sicily is a scheduled port of call on day 18 of the 23-night Mediterranean Constellation Lisbon to Monte Carlo cruise on Oceania Regatta. Expected weather: clear with highs near 94°F.

19. Day 19 — Friday, Jul 17, 2026 — Monaco

    Monaco is a scheduled port of call on day 19 of the 23-night Mediterranean Constellation Lisbon to Monte Carlo cruise on Oceania Regatta. Expected weather: clear with highs near 82°F.