Alaska Cruise Sea Days — What to Do When You're Not in Port

On a typical warm-weather cruise, a “sea day” can feel like a necessary but unexciting transit between tropical ports. In Alaska, the opposite is true. Here, sea days are the main event—dedicated days of scenic cruising that often become the most memorable part of the entire journey.

Forget what you know about sea days. In the Last Frontier, these are not wasted days. They are your ticket to the heart of Alaska’s wilderness, a front-row seat to a world of towering glaciers, dense rainforests, and abundant wildlife, all viewed from the comfort of your ship.

The Inside Passage: A Protected Waterway of Wonders

Most Alaska cruises spend significant time navigating the Inside Passage, a protected network of waterways that winds through the islands of the Alexander Archipelago. This is scenic cruising at its finest. For hundreds of miles, your ship glides through deep, glacier-carved fjords, past islands blanketed in lush temperate rainforest, and alongside mountains that rise dramatically from the sea.

This route offers more stunning scenery per hour than almost any other cruise itinerary on Earth. Grab a coffee and a pair of binoculars and find a spot in the forward observation lounge or on the open deck. The view is constantly changing, with something new to see around every bend.

Glacier Bay National Park: The Ultimate Sea Day

The crown jewel of any Alaska cruise is a day spent in Glacier Bay National Park, a UNESCO World Heritage Site. Due to its protected status, only a limited number of ships are granted permits to enter these pristine waters each day. A visit here is a full-day experience, typically lasting between 8 and 10 hours.

As your ship enters the bay, National Park Service Rangers board the vessel to provide expert narration over the ship’s public address system. They’ll point out geological features, share the history of the bay, and help you spot wildlife. They also set up an information desk and often give presentations in one of the ship’s theaters.

The day culminates with the ship slowly approaching the faces of massive tidewater glaciers, like the famed Margerie Glacier or Grand Pacific Glacier. You’ll spend about an hour in front of a major glacier, listening to the thunderous crack of ice calving into the sea—a truly unforgettable sound.

Tips for Glacier Bay:

• Get Up Early: Be on deck by 7 or 8 a.m. as the ship enters the most scenic parts of the bay.
• Dress Warmly: It can be significantly colder near the glaciers. Wear multiple layers, including a hat and gloves.
• Bring Binoculars: Use them to scan the cliffs for mountain goats and look for harbor seals resting on floating ice chunks.

Onboard Activities Tailored to the Scenery

Cruise lines in Alaska understand that the destination is the star. On sea days, you’ll find a wealth of enrichment opportunities designed to deepen your connection to the region.

• Enrichment Lectures: Onboard naturalists, historians, and sometimes cultural experts give fascinating presentations on everything from whale behavior and glacier dynamics to the Tlingit culture and the Klondike Gold Rush.
• Photography Workshops: Learn how to best capture the stunning landscapes and wildlife from the ship’s photographers.
• Observation Lounges: These forward-facing lounges with panoramic windows are prime real estate on sea days. Settle in with a good book and a warm drink, but be prepared to be distracted by the view.
• Spa & Relaxation: A spa appointment with a view of a fjord is a uniquely Alaskan experience. Many passengers find sea days to be the perfect time for some pampering.

A Deck-Side Safari: Wildlife Viewing at Sea

You don’t need to be on a shore excursion to see Alaska’s incredible wildlife. The ship itself is a moving viewing platform. Keep your eyes peeled and listen for announcements from the bridge pointing out sightings.

• Whales: Humpback whales are frequently seen in the Inside Passage and Frederick Sound, often engaging in behaviors like breaching and tail-slapping. Orcas (killer whales) are also a common sight.
• Porpoises & Sea Lions: Watch for the distinctive black-and-white markings of Dall’s porpoises playing in the ship’s bow wake. Steller sea lions can often be seen hauled out on rocky shorelines or buoys.
• Eagles and More: Bald eagles are ubiquitous, often seen soaring overhead or perched in treetops along the shore. You might also spot sea otters floating on their backs in kelp beds.

A Note on Rough Seas

While the Inside Passage is mostly protected and calm, itineraries that cross the Gulf of Alaska—typically one-way voyages between Vancouver and Whittier/Seward—involve open-ocean sailing that can be rough. If you’re on one of these routes or are prone to motion sickness, it’s a good idea to have medication like Dramamine or Bonine on hand. Choosing a cabin in the middle of the ship on a lower deck can also help minimize the sensation of movement.