Finding out there’s a storm that’s joining you on vacation totally stinks. Trust me, it’s happened several times. Just know, a storm in Southeast Alaska doesn’t automatically mean your cruise vacation is ruined. In fact, weather disruptions are simply part of traveling through one of the most dramatic weather regions in North America.

For cruise passengers visiting Juneau and Ketchikan, storms can bring heavy rain, strong winds, rough seas and changes to shore excursions. Sometimes the impact is minor. Other times, the weather can cause changes to your port tours or even alter a ship’s itinerary.

Rough Seas: What Does It Actually Mean on a Cruise Ship?

One of the biggest concerns I hear from passengers who are on a cruise during the storm is, will there be rough seas?

The good news is that modern cruise ships are large, heavily engineered vessels designed to operate in a wide range of weather conditions. Captains also have sophisticated weather forecasting, radar and navigation systems that allow them to adjust routes when necessary.

However, passengers can still feel motion when a ship encounters larger waves.

You may experience:

• Rocking or swaying
• Vibrations from the ship adjusting to waves
• Difficulty walking in some areas of the ship
• Closed outdoor decks or pools
• Increased motion sickness for sensitive passengers

Southeast Alaska’s Inside Passage provides some protection from the open Pacific, but conditions can still become rough, especially in exposed waterways and during strong wind events.

The National Weather Service uses marine advisories to warn mariners about hazardous conditions. In Alaska, Small Craft Advisories can be associated with winds in the 23-to-33-knot range (approximately 26 to 38 mph), while rough-sea advisories may also be issued for locally significant wave conditions. Gale-force winds are even stronger, beginning at 34 knots (approximately 39 mph).

For passengers, the important thing to remember is this: the captain and cruise line will make route and operational decisions based on safety—not whether the weather forecast looks good on your phone.

Will the Cruise Ship Still Go to Juneau or Ketchikan?

Cruise ships can often continue operating during rain and moderate storms. Alaska is famous for wet weather, particularly around Ketchikan, and rain alone rarely stops a cruise ship from visiting port.

Strong winds, however, can be a different story.

Depending on the direction and strength of the wind, conditions could affect:

• The ability to safely dock
• Tender operations
• Navigation through certain waterways
• Arrival and departure times
• The order of ports on an itinerary
• Whether the ship can safely remain at a particular port

A ship might arrive late, leave early, skip a port or change its route entirely. In more serious weather situations, a captain may decide that avoiding a particular port or exposed area is the safest option.

Even port schedules can change at the last minute. Visit Ketchikan specifically advises travelers that cruise ship schedules and docking arrangements can experience last-minute changes.

That doesn’t necessarily mean something has gone wrong. Weather routing is a normal part of operating ships in Alaska.

What Happens to Shore Excursions?

This is often where travelers see the biggest impact. Not every excursion responds to bad weather in the same way.

Boat and Wildlife Excursions

Small boats are usually more affected by wind and waves than the cruise ship itself.

Whale-watching trips, fishing charters, kayaking adventures and other marine excursions may be modified, delayed or canceled if conditions become unsafe.

A cruise ship may be able to safely reach Juneau or Ketchikan while a much smaller excursion vessel cannot safely operate.

This is an important distinction: your ship can be in port even when your planned excursion is canceled.

Floatplanes and Helicopters

Aviation tours are especially dependent on weather conditions.

Low clouds, poor visibility, strong winds and changing conditions around glaciers and mountains can cause cancellations.

This can affect popular experiences such as:

• Glacier helicopter tours
• Flightseeing
• Floatplane trips
• Remote wilderness excursions

Because Southeast Alaska has dramatic mountains and rapidly changing weather, a sunny day at the cruise terminal doesn’t necessarily mean flying conditions are safe elsewhere.

Hiking and Outdoor Adventures

Rain generally won’t cancel every outdoor excursion.

Alaska tour operators and travelers are accustomed to wet conditions. Many hiking, sightseeing and cultural tours continue during rain.

However, severe winds, flooding, lightning, landslides or other hazardous conditions could lead to changes.

The key difference is simple: rain is normal in Southeast Alaska; dangerous conditions are not something operators ignore.

What If Your Excursion Is Canceled?

Don’t panic—and don’t immediately assume your entire day is ruined.

Juneau and Ketchikan both have activities that may be less dependent on marine or aviation conditions.

Ketchikan offers downtown shopping, museums, cultural attractions and opportunities for independent exploration. The community’s visitor information services can also help travelers find activities and transportation options when plans change.

If an excursion is canceled, consider:

• Exploring downtown
• Visiting museums or cultural attractions
• Finding an indoor restaurant or café
• Taking a self-guided walking tour if conditions allow
• Checking with the ship’s excursion desk for alternative activities
• Visiting the local visitor center for same-day options

Ketchikan’s visitor services specifically offer information about current conditions and can help travelers find tours and activities.

Excursions Booked Through the Cruise Line vs. Independently

Storms are one situation where booking decisions can become especially important.

If you book an excursion through the cruise line, the ship’s excursion department typically coordinates directly with the tour operator when the itinerary changes.

If you book independently, you will need to communicate directly with the tour company.

Neither option guarantees that weather won’t cancel your plans, but independent travelers should make sure they understand:

• The cancellation policy
• The weather policy
• What happens if the ship arrives late
• What happens if the ship skips the port entirely
• Whether refunds or credits are available

A smart move before your trip is to save excursion companies’ contact information somewhere other than just your email inbox.

How to Prepare for a Stormy Day in Port

The biggest mistake Alaska travelers make is packing for the forecast they hope to have instead of the conditions they might actually encounter.

A good storm-day kit includes:

A Waterproof Jacket

Not just water-resistant.

A waterproof outer shell can make the difference between an enjoyable day and a miserable one.

Layers

Temperatures can change quickly, and wind can make conditions feel significantly colder.

Think:

Base layer → insulating layer → waterproof outer layer

Waterproof Shoes

Wet sidewalks, docks, trails and puddles are common.

You don’t necessarily need heavy hiking boots, but footwear that can handle rain is extremely useful.

A Small Waterproof Bag

Protect:

• Phones
• Cameras
• Tickets
• Identification
• Electronics

Motion Sickness Preparation

If you’re sensitive to ship movement, don’t wait until the seas are already rough.

Bring your preferred motion sickness medication or remedies and follow the directions provided by your healthcare professional or the product label.

Pay Attention to Ship Announcements

During a weather event, your cruise ship will become your best source of information.

Don’t rely exclusively on social media posts, weather apps or online cruise groups.

Weather conditions can change rapidly, and the information affecting your specific ship may be different from what is happening elsewhere in Southeast Alaska.

Pay attention to:

• Captain’s announcements
• Cruise line app notifications
• Excursion desk updates
• Messages delivered to your cabin
• Changes posted around the ship

The U.S. Coast Guard maintains operational port-status information for Southeast Alaska, while the actual decisions affecting an individual cruise ship’s route remain dependent on the vessel, conditions and operational safety considerations.

The Silver Lining: Storms Can Be Part of the Alaska Experience

Alaska isn’t a destination where perfect weather should be expected every day.

Some of the most memorable experiences happen when clouds hang low over the mountains, rain falls through the rainforest and the ocean becomes dramatic.

A storm can also change how you experience the journey itself.

You might spend more time watching waves from a warm lounge. You may see mist moving through the mountains around Juneau. You could experience Ketchikan exactly as its coastal rainforest environment intended—wet, green and spectacular.

The key is to remain flexible.

Your itinerary may change. Your excursion may change. Your plans may change. But that doesn’t mean the adventure is over.

WeatherPassport’s Bottom Line

If a storm impacts Juneau or Ketchikan during your Alaska cruise:

Expect rain. Prepare for wind. Be ready for rougher seas. Have a backup plan.

Most importantly, don’t assume a storm automatically means canceled ports or a ruined vacation.

Large cruise ships are designed to handle significant weather, but captains will change plans when necessary. Smaller excursion boats and aircraft are often more vulnerable to weather conditions, meaning shore excursions may be modified even when the cruise ship successfully arrives in port.

The best Alaska cruise travelers are the ones who pack for changing weather, build flexibility into their expectations and remember that sometimes the weather becomes part of the story.

Because in Alaska, the forecast isn’t just something you check before you leave the ship.

Sometimes, it’s part of the adventure.