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Loading Travel Forecast…Loading Travel Forecast…Loading Travel Forecast…The Costa Diadema sails a 11-night Western Mediterranean from Barcelona itinerary with Costa Cruises, departing Barcelona, Spain on September 28, 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 Barcelona, Spain, Cadiz, Spain, Lisbon, Portugal, with 7 more along the way. Use the day-by-day forecast below to plan what to pack for each stop.
Barcelona, Spain is a scheduled port of call on day 1 of the 11-night Western Mediterranean from Barcelona cruise on Costa Diadema. Expected weather: partially cloudy with highs near 74°F.
Day 2 of 12 is a day at sea aboard Costa Diadema, cruising between ports on the Western Mediterranean from Barcelona itinerary.
Cadiz, Spain is a scheduled port of call on day 3 of the 11-night Western Mediterranean from Barcelona cruise on Costa Diadema. Expected weather: partially cloudy with highs near 76°F.
Lisbon, Portugal is a scheduled port of call on day 4 of the 11-night Western Mediterranean from Barcelona cruise on Costa Diadema. Expected weather: partially cloudy with highs near 74°F.
Lisbon, Portugal is a scheduled port of call on day 5 of the 11-night Western Mediterranean from Barcelona cruise on Costa Diadema. Expected weather: partially cloudy with highs near 74°F.
Gibraltar, UK is a scheduled port of call on day 6 of the 11-night Western Mediterranean from Barcelona cruise on Costa Diadema. Expected weather: partially cloudy with highs near 62°F.
Malaga, Spain is a scheduled port of call on day 7 of the 11-night Western Mediterranean from Barcelona cruise on Costa Diadema. Expected weather: partially cloudy with highs near 74°F.
Cartagena, Spain is a scheduled port of call on day 8 of the 11-night Western Mediterranean from Barcelona cruise on Costa Diadema. Expected weather: partially cloudy with highs near 75°F.
Day 9 of 12 is a day at sea aboard Costa Diadema, cruising between ports on the Western Mediterranean from Barcelona itinerary.
Marseille, France is a scheduled port of call on day 10 of the 11-night Western Mediterranean from Barcelona cruise on Costa Diadema. Expected weather: partially cloudy with highs near 68°F.
Savona, Italy is a scheduled port of call on day 11 of the 11-night Western Mediterranean from Barcelona cruise on Costa Diadema. Expected weather: partially cloudy with highs near 70°F.
Barcelona, Spain is a scheduled port of call on day 12 of the 11-night Western Mediterranean from Barcelona cruise on Costa Diadema. Expected weather: partially cloudy with highs near 71°F.
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