Alaska cruise guide: routes, glaciers and wildlife
Tidewater glaciers, humpback whales and rainforest ports — how to choose an Alaska cruise and route.
Alaska is a cruise region unlike any other: instead of beaches and old towns, you get tidewater glaciers, rainforest and wildlife on a scale that feels genuinely wild. Most sailings run from May to September, and the two big decisions are which route to take and how much you want to focus on scenery versus ports.
When to go
- May and early June — driest and clearest in some areas, fewer families, cooler.
- July and August — warmest, longest days, peak season and the best whale watching.
- September — quieter and often cheaper, with more rain and shorter days.
Days are very long in mid-summer, which gives you more usable hours in every port.
Wildlife is never guaranteed, but July and August are usually the strongest months for whales, bears and eagles.
Inside Passage vs Gulf of Alaska
The classic choice is between two route shapes:
| Route | What it is | Best for |
|---|---|---|
| Inside Passage | Round trip from Seattle or Vancouver | Ports, easy logistics, calmer seas |
| Gulf of Alaska | One-way between Vancouver and Seward/Whittier | Glaciers, Denali add-ons, scenery |
The Inside Passage is sheltered and port-heavy. A Gulf of Alaska (north or south) crossing reaches bigger glaciers and pairs well with a land extension to Denali.
Glaciers
Glacier viewing is the heart of an Alaska cruise. Key experiences usually include:
- Glacier Bay National Park — a full day of scenic cruising, often with park rangers on board.
- Hubbard Glacier — one of the largest tidewater glaciers, seen on many Gulf routes.
- Tracy Arm or Endicott Arm — narrow fjords with floating ice and waterfalls.
The captain usually turns the ship so both sides get a view, so claim a spot on deck or a balcony and stay put.
Wildlife
- Whales: humpbacks and orcas, especially around Juneau and Icy Strait.
- Bears: black and brown bears, often seen on excursions rather than from the ship.
- Eagles, sea otters and puffins are common along the route.
Bring binoculars and a telephoto lens: most sightings are at a distance.
What to pack
Alaska is wet and cool more often than it is cold. The essentials are:
- A waterproof jacket with a hood and waterproof shoes.
- Layers, including a warm mid-layer for glacier days.
- Binoculars and a hat and gloves for time on deck.
- Mosquito repellent for forest stops in summer.
Planning your time
- Choose one anchor per port: a glacier, a whale trip or a rainforest walk.
- Book glacier and wildlife excursions early — the best ones sell out.
- Note that many Alaska ports are small and walkable, but the headline sights are a transfer away.
Practical tips
- The scenery is best from the deck: dress for wind and rain.
- For dates and seasonal trade-offs, see our best time to cruise guide.
- Explore individual stops with our Juneau and Ketchikan guides.