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Loading Travel Forecast…Loading Travel Forecast…Loading Travel Forecast…Departing Seattle, Washington on September 19, 2026, the Princess Cruises ship Royal Princess runs this 26-night Southeast Asia, Japan & Alaska Grand Adventure sailing. 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, Juneau, Alaska, Hubbard Glacier, Alaska, with 8 more along the way. Scroll the daily outlook below to pack smart for every port of call.
Seattle, Washington is a scheduled port of call on day 1 of the 26-night Southeast Asia, Japan & Alaska Grand Adventure cruise on Royal Princess. Expected weather: partially cloudy with highs near 67°F.
Day 2 of 27 is a day at sea aboard Royal Princess, cruising between ports on the Southeast Asia, Japan & Alaska Grand Adventure itinerary.
Juneau, Alaska is a scheduled port of call on day 3 of the 26-night Southeast Asia, Japan & Alaska Grand Adventure cruise on Royal Princess. Expected weather: partially cloudy with highs near 59°F.
Hubbard Glacier, Alaska is a scheduled port of call on day 4 of the 26-night Southeast Asia, Japan & Alaska Grand Adventure cruise on Royal Princess. Expected weather: partially cloudy with highs near 42°F.
Day 5 of 27 is a day at sea aboard Royal Princess, cruising between ports on the Southeast Asia, Japan & Alaska Grand Adventure itinerary.
Whittier, Alaska is a scheduled port of call on day 6 of the 26-night Southeast Asia, Japan & Alaska Grand Adventure cruise on Royal Princess. Expected weather: partially cloudy with highs near 50°F.
Day 7 of 27 is a day at sea aboard Royal Princess, cruising between ports on the Southeast Asia, Japan & Alaska Grand Adventure itinerary.
Day 8 of 27 is a day at sea aboard Royal Princess, cruising between ports on the Southeast Asia, Japan & Alaska Grand Adventure itinerary.
Day 9 of 27 is a day at sea aboard Royal Princess, cruising between ports on the Southeast Asia, Japan & Alaska Grand Adventure itinerary.
Day 10 of 27 is a day at sea aboard Royal Princess, cruising between ports on the Southeast Asia, Japan & Alaska Grand Adventure itinerary.
Day 11 of 27 is a day at sea aboard Royal Princess, cruising between ports on the Southeast Asia, Japan & Alaska Grand Adventure itinerary.
Day 12 of 27 is a day at sea aboard Royal Princess, cruising between ports on the Southeast Asia, Japan & Alaska Grand Adventure itinerary.
Day 13 of 27 is a day at sea aboard Royal Princess, cruising between ports on the Southeast Asia, Japan & Alaska Grand Adventure itinerary.
Day 14 of 27 is a day at sea aboard Royal Princess, cruising between ports on the Southeast Asia, Japan & Alaska Grand Adventure itinerary.
Day 15 of 27 is a day at sea aboard Royal Princess, cruising between ports on the Southeast Asia, Japan & Alaska Grand Adventure itinerary.
Tokyo, Japan is a scheduled port of call on day 16 of the 26-night Southeast Asia, Japan & Alaska Grand Adventure cruise on Royal Princess.
Shimizu, Japan is a scheduled port of call on day 17 of the 26-night Southeast Asia, Japan & Alaska Grand Adventure cruise on Royal Princess.
Kobe/Osaka, Japan is a scheduled port of call on day 18 of the 26-night Southeast Asia, Japan & Alaska Grand Adventure cruise on Royal Princess.
Day 19 of 27 is a day at sea aboard Royal Princess, cruising between ports on the Southeast Asia, Japan & Alaska Grand Adventure itinerary.
Day 20 of 27 is a day at sea aboard Royal Princess, cruising between ports on the Southeast Asia, Japan & Alaska Grand Adventure itinerary.
Keelung, Taiwan is a scheduled port of call on day 21 of the 26-night Southeast Asia, Japan & Alaska Grand Adventure cruise on Royal Princess.
Day 22 of 27 is a day at sea aboard Royal Princess, cruising between ports on the Southeast Asia, Japan & Alaska Grand Adventure itinerary.
Hong Kong, China is a scheduled port of call on day 23 of the 26-night Southeast Asia, Japan & Alaska Grand Adventure cruise on Royal Princess.
Day 24 of 27 is a day at sea aboard Royal Princess, cruising between ports on the Southeast Asia, Japan & Alaska Grand Adventure itinerary.
Da Nang, Vietnam is a scheduled port of call on day 25 of the 26-night Southeast Asia, Japan & Alaska Grand Adventure cruise on Royal Princess.
Day 26 of 27 is a day at sea aboard Royal Princess, cruising between ports on the Southeast Asia, Japan & Alaska Grand Adventure itinerary.
Day 27 of 27 is a day at sea aboard Royal Princess, cruising between ports on the Southeast Asia, Japan & Alaska Grand Adventure itinerary.
Singapore is a scheduled port of call on day 28 of the 26-night Southeast Asia, Japan & Alaska Grand Adventure cruise on Royal Princess.
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