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Loading Travel Forecast…Loading Travel Forecast…Loading Travel Forecast…Join MSC Cruises's MSC Poesia for a 26-night voyage on the MSC Grand Voyages route, setting out from Seattle, Washington on September 21, 2026. It's a classic Alaska cruise. Travelers sailing in September can generally expect cool days, crisp nights, and long hours of daylight typical of the Alaska cruise season — with rain never far off. Ports of call include Seattle, Washington, Ketchikan, Alaska, Sitka, Alaska, with 11 more along the way. The forecasts below break the weather down port by port.
Seattle, Washington is a scheduled port of call on day 1 of the 26-night MSC Grand Voyages cruise on MSC Poesia. Expected weather: partially cloudy with highs near 67°F.
Day 2 of 27 is a day at sea aboard MSC Poesia, cruising between ports on the MSC Grand Voyages itinerary.
Ketchikan, Alaska is a scheduled port of call on day 3 of the 26-night MSC Grand Voyages cruise on MSC Poesia. Expected weather: partially cloudy with highs near 56°F.
Sitka, Alaska is a scheduled port of call on day 4 of the 26-night MSC Grand Voyages cruise on MSC Poesia. Expected weather: partially cloudy with highs near 56°F.
Tracy Arm/Endicott Arm, Alaska is a scheduled port of call on day 5 of the 26-night MSC Grand Voyages cruise on MSC Poesia. Expected weather: partially cloudy with highs near 55°F.
Day 6 of 27 is a day at sea aboard MSC Poesia, cruising between ports on the MSC Grand Voyages itinerary.
Victoria, British Columbia is a scheduled port of call on day 7 of the 26-night MSC Grand Voyages cruise on MSC Poesia. Expected weather: partially cloudy with highs near 57°F.
Seattle, Washington is a scheduled port of call on day 8 of the 26-night MSC Grand Voyages cruise on MSC Poesia. Expected weather: partially cloudy with highs near 65°F.
Day 9 of 27 is a day at sea aboard MSC Poesia, cruising between ports on the MSC Grand Voyages itinerary.
Day 10 of 27 is a day at sea aboard MSC Poesia, cruising between ports on the MSC Grand Voyages itinerary.
Day 11 of 27 is a day at sea aboard MSC Poesia, cruising between ports on the MSC Grand Voyages itinerary.
Los Angeles, California is a scheduled port of call on day 12 of the 26-night MSC Grand Voyages cruise on MSC Poesia. Expected weather: partially cloudy with highs near 78°F.
San Diego, California is a scheduled port of call on day 13 of the 26-night MSC Grand Voyages cruise on MSC Poesia. Expected weather: partially cloudy with highs near 73°F.
Day 14 of 27 is a day at sea aboard MSC Poesia, cruising between ports on the MSC Grand Voyages itinerary.
Day 15 of 27 is a day at sea aboard MSC Poesia, cruising between ports on the MSC Grand Voyages itinerary.
Cabo San Lucas, Mexico is a scheduled port of call on day 16 of the 26-night MSC Grand Voyages cruise on MSC Poesia.
Day 17 of 27 is a day at sea aboard MSC Poesia, cruising between ports on the MSC Grand Voyages itinerary.
Day 18 of 27 is a day at sea aboard MSC Poesia, cruising between ports on the MSC Grand Voyages itinerary.
Day 19 of 27 is a day at sea aboard MSC Poesia, cruising between ports on the MSC Grand Voyages itinerary.
Puntarenas, Costa Rica is a scheduled port of call on day 20 of the 26-night MSC Grand Voyages cruise on MSC Poesia.
Day 21 of 27 is a day at sea aboard MSC Poesia, cruising between ports on the MSC Grand Voyages itinerary.
Panama Canal is a scheduled port of call on day 22 of the 26-night MSC Grand Voyages cruise on MSC Poesia.
Colon, Panama is a scheduled port of call on day 23 of the 26-night MSC Grand Voyages cruise on MSC Poesia.
Cartagena, Colombia is a scheduled port of call on day 24 of the 26-night MSC Grand Voyages cruise on MSC Poesia.
Day 25 of 27 is a day at sea aboard MSC Poesia, cruising between ports on the MSC Grand Voyages itinerary.
Day 26 of 27 is a day at sea aboard MSC Poesia, cruising between ports on the MSC Grand Voyages itinerary.
Miami, Florida is a scheduled port of call on day 27 of the 26-night MSC Grand Voyages cruise on MSC Poesia.
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