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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 68°F.
Juneau, Alaska is a scheduled port of call on day 2 of the 26-night Southeast Asia, Japan & Alaska Grand Adventure cruise on Royal Princess. Expected weather: rain, partially cloudy with highs near 58°F.
Hubbard Glacier, 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 42°F.
Whittier, 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 50°F.
Tokyo, Japan is a scheduled port of call on day 5 of the 26-night Southeast Asia, Japan & Alaska Grand Adventure cruise on Royal Princess. Expected weather: partially cloudy with highs near 73°F.
Shimizu, Japan 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 74°F.
Kobe/Osaka, Japan is a scheduled port of call on day 7 of the 26-night Southeast Asia, Japan & Alaska Grand Adventure cruise on Royal Princess. Expected weather: partially cloudy with highs near 76°F.
Keelung, Taiwan is a scheduled port of call on day 8 of the 26-night Southeast Asia, Japan & Alaska Grand Adventure cruise on Royal Princess. Expected weather: partially cloudy with highs near 77°F.
Hong Kong, China is a scheduled port of call on day 9 of the 26-night Southeast Asia, Japan & Alaska Grand Adventure cruise on Royal Princess. Expected weather: partially cloudy with highs near 80°F.
Da Nang, Vietnam is a scheduled port of call on day 10 of the 26-night Southeast Asia, Japan & Alaska Grand Adventure cruise on Royal Princess. Expected weather: rain, partially cloudy with highs near 82°F.
Singapore is a scheduled port of call on day 11 of the 26-night Southeast Asia, Japan & Alaska Grand Adventure cruise on Royal Princess. Expected weather: partially cloudy with highs near 83°F.
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