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Loading Travel Forecast…Loading Travel Forecast…Loading Travel Forecast…Join Princess Cruises's Sapphire Princess for a 28-night voyage on the Japan & Southeast Asia Grand Adventure route, setting out from Singapore on December 26, 2026. It's a classic Asia cruise. Travelers sailing in December can generally expect cooler, off-season conditions. Ports of call include Singapore, Laem Chabang, Thailand, Laem Chabang, Thailand, with 16 more along the way. The forecasts below break the weather down port by port.
Singapore is a scheduled port of call on day 1 of the 28-night Japan & Southeast Asia Grand Adventure cruise on Sapphire Princess. Expected weather: overcast with highs near 81°F.
Day 2 of 29 is a day at sea aboard Sapphire Princess, cruising between ports on the Japan & Southeast Asia Grand Adventure itinerary.
Laem Chabang, Thailand is a scheduled port of call on day 3 of the 28-night Japan & Southeast Asia Grand Adventure cruise on Sapphire Princess. Expected weather: partially cloudy with highs near 88°F.
Laem Chabang, Thailand is a scheduled port of call on day 4 of the 28-night Japan & Southeast Asia Grand Adventure cruise on Sapphire Princess. Expected weather: partially cloudy with highs near 89°F.
Ko Samui, Thailand is a scheduled port of call on day 5 of the 28-night Japan & Southeast Asia Grand Adventure cruise on Sapphire Princess. Expected weather: partially cloudy with highs near 78°F.
Sihanoukville, Cambodia is a scheduled port of call on day 6 of the 28-night Japan & Southeast Asia Grand Adventure cruise on Sapphire Princess. Expected weather: partially cloudy with highs near 88°F.
Day 7 of 29 is a day at sea aboard Sapphire Princess, cruising between ports on the Japan & Southeast Asia Grand Adventure itinerary.
Ho Chi Minh City, Vietnam is a scheduled port of call on day 8 of the 28-night Japan & Southeast Asia Grand Adventure cruise on Sapphire Princess. Expected weather: partially cloudy with highs near 85°F.
Day 9 of 29 is a day at sea aboard Sapphire Princess, cruising between ports on the Japan & Southeast Asia Grand Adventure itinerary.
Day 10 of 29 is a day at sea aboard Sapphire Princess, cruising between ports on the Japan & Southeast Asia Grand Adventure itinerary.
Penang, Malaysia is a scheduled port of call on day 11 of the 28-night Japan & Southeast Asia Grand Adventure cruise on Sapphire Princess. Expected weather: partially cloudy with highs near 89°F.
Phuket, Thailand is a scheduled port of call on day 12 of the 28-night Japan & Southeast Asia Grand Adventure cruise on Sapphire Princess. Expected weather: partially cloudy with highs near 83°F.
Langkawi, Malaysia is a scheduled port of call on day 13 of the 28-night Japan & Southeast Asia Grand Adventure cruise on Sapphire Princess. Expected weather: partially cloudy with highs near 83°F.
Klang, Malaysia is a scheduled port of call on day 14 of the 28-night Japan & Southeast Asia Grand Adventure cruise on Sapphire Princess. Expected weather: partially cloudy with highs near 86°F.
Singapore is a scheduled port of call on day 15 of the 28-night Japan & Southeast Asia Grand Adventure cruise on Sapphire Princess. Expected weather: partially cloudy with highs near 81°F.
Day 16 of 29 is a day at sea aboard Sapphire Princess, cruising between ports on the Japan & Southeast Asia Grand Adventure itinerary.
Nha Trang, Vietnam is a scheduled port of call on day 17 of the 28-night Japan & Southeast Asia Grand Adventure cruise on Sapphire Princess.
Day 18 of 29 is a day at sea aboard Sapphire Princess, cruising between ports on the Japan & Southeast Asia Grand Adventure itinerary.
Halong Bay, Vietnam is a scheduled port of call on day 19 of the 28-night Japan & Southeast Asia Grand Adventure cruise on Sapphire Princess.
Halong Bay, Vietnam is a scheduled port of call on day 20 of the 28-night Japan & Southeast Asia Grand Adventure cruise on Sapphire Princess.
Day 21 of 29 is a day at sea aboard Sapphire Princess, cruising between ports on the Japan & Southeast Asia Grand Adventure itinerary.
Hong Kong, China is a scheduled port of call on day 22 of the 28-night Japan & Southeast Asia Grand Adventure cruise on Sapphire Princess.
Day 23 of 29 is a day at sea aboard Sapphire Princess, cruising between ports on the Japan & Southeast Asia Grand Adventure itinerary.
Keelung, Taiwan is a scheduled port of call on day 24 of the 28-night Japan & Southeast Asia Grand Adventure cruise on Sapphire Princess.
Miyakojima, Japan is a scheduled port of call on day 25 of the 28-night Japan & Southeast Asia Grand Adventure cruise on Sapphire Princess.
Day 26 of 29 is a day at sea aboard Sapphire Princess, cruising between ports on the Japan & Southeast Asia Grand Adventure itinerary.
Nagasaki, Japan is a scheduled port of call on day 27 of the 28-night Japan & Southeast Asia Grand Adventure cruise on Sapphire Princess.
Day 28 of 29 is a day at sea aboard Sapphire Princess, cruising between ports on the Japan & Southeast Asia Grand Adventure itinerary.
Tokyo, Japan is a scheduled port of call on day 29 of the 28-night Japan & Southeast Asia Grand Adventure cruise on Sapphire Princess.
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