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

Join Princess Cruises's Ruby Princess for a 10-night voyage on the Inside Passage (Roundtrip San Francisco) route, setting out from San Francisco, California on August 11, 2026. It's a classic Alaska cruise. Travelers sailing in August 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. The forecasts below break the weather down port by port.

1. Day 1 — Tuesday, Aug 11, 2026 — 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 74°F.

2. Day 2 — Friday, Aug 14, 2026 — 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 63°F.

3. Day 3 — Saturday, Aug 15, 2026 — 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 59°F.

4. Day 4 — Sunday, Aug 16, 2026 — Sitka, Alaska

   Sitka, 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 62°F.

5. Day 5 — Monday, Aug 17, 2026 — 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 61°F.

6. Day 6 — Tuesday, Aug 18, 2026 — 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 64°F.

7. Day 7 — Friday, Aug 21, 2026 — 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 75°F.