10-Night Cruise on Ruby PrincessInside Passage (Roundtrip San Francisco) - Weather

The Ruby Princess sails a 10-night Inside Passage (Roundtrip San Francisco) itinerary with Princess Cruises, departing San Francisco, California on May 21, 2027. It's a classic Alaska cruise. Travelers sailing in May 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 San Francisco, California, Tracy Arm/Endicott Arm, Alaska, Skagway, Alaska, with 4 more along the way. Use the day-by-day forecast below to plan what to pack for each stop.

1. Day 1 — Friday, May 21, 2027 — San Francisco, California

   San Francisco, California is a scheduled port of call on day 1 of the 10-night Inside Passage (Roundtrip San Francisco) cruise on Ruby Princess. Expected weather: partially cloudy with highs near 67°F.

2. Day 2 — Monday, May 24, 2027 — Tracy Arm/Endicott Arm, Alaska

   Tracy Arm/Endicott Arm, Alaska is a scheduled port of call on day 2 of the 10-night Inside Passage (Roundtrip San Francisco) cruise on Ruby Princess. Expected weather: partially cloudy with highs near 55°F.

3. Day 3 — Tuesday, May 25, 2027 — Skagway, Alaska

   Skagway, Alaska is a scheduled port of call on day 3 of the 10-night Inside Passage (Roundtrip San Francisco) cruise on Ruby Princess. Expected weather: partially cloudy with highs near 51°F.

4. Day 4 — Wednesday, May 26, 2027 — Juneau, Alaska

   Juneau, Alaska is a scheduled port of call on day 4 of the 10-night Inside Passage (Roundtrip San Francisco) cruise on Ruby Princess. Expected weather: partially cloudy with highs near 60°F.

5. Day 5 — Thursday, May 27, 2027 — Ketchikan, Alaska

   Ketchikan, Alaska is a scheduled port of call on day 5 of the 10-night Inside Passage (Roundtrip San Francisco) cruise on Ruby Princess. Expected weather: partially cloudy with highs near 54°F.

6. Day 6 — Friday, May 28, 2027 — Prince Rupert, British Columbia

   Prince Rupert, British Columbia is a scheduled port of call on day 6 of the 10-night Inside Passage (Roundtrip San Francisco) cruise on Ruby Princess. Expected weather: partially cloudy with highs near 57°F.

7. Day 7 — Monday, May 31, 2027 — San Francisco, California

   San Francisco, California is a scheduled port of call on day 7 of the 10-night Inside Passage (Roundtrip San Francisco) cruise on Ruby Princess. Expected weather: partially cloudy with highs near 68°F.