Alaska Cruise Weather - What to Expect

Alaska’s weather is famously variable, and that’s largely due to its unique geographical location. Where cool Arctic air meets moist Pacific air and rugged coastal mountains rise straight from the seas, weather can change quickly, even within the same day. Temperatures stay fairly mild during the cruise season, but rain, wind, and shifting clouds are all part of the experience, no matter when you visit.

That’s why, in Alaska, we don’t think of weather as something that stops us from getting outside—only preparation does. With the right layers and rain gear, Alaska’s landscapes, wildlife, and outdoor adventures are just as enjoyable in misty conditions as they are under blue skies. No matter the time of year you cruise, coming prepared for the weather is the key to making the most of your time.

The Alaska cruise season runs from April through October, with the best weather typically occurring from June to August.

In spring, as winter melts away, days are typically cool, with daily highs of 45 to 50 degrees. Although each port is open and ready to welcome cruisers, some excursions may not operate in the spring due to lingering winter conditions.

In Southeast Alaska, the ‘dry season’ is April through June. During this time, we see the least rainfall, averaging around 3 inches per month. Making it an attractive time of year to visit.

During the summer months, you can expect more rain-free days and average daily temperatures in the low 60s. Cruisers can expect smooth ocean conditions and a vast array of activities to choose from. Although the summer months bring the best weather, cool ocean winds and rain are frequent.

In the fall, the rains and fall storms tend to arrive. By early September, the summer warmth has melted the glacier snowpack, ending the season for glacier dog-sledding helicopter tours. The weather gets progressively cooler and wetter as the cruise season comes to a close.

Weather - Alaska’s Cruise Season

Alaska Weather FAQ

Based on the weather, when is the best time to schedule my tour?

Since the weather in Alaska changes frequently and lacks a predictable pattern, we recommend scheduling a tour at a time that works best for you. After years of experience, we know that there is no way to outsmart or out-schedule the weather—Mother Nature is going to do what she wants. Instead, we recommend that you pack and prepare for inclement weather.

Will rain cancel my excursion?

It is unlikely that rain would cancel an excursion. Most excursions operate rain or shine, so it is important to pack and plan for rain.

Although rain does not impact tours, low clouds and winds can impact helicopter and seaplane tours. Your safety is our priority. If your pilot determines that the weather conditions are unfavorable for flightseeing, your tour will be canceled and refunded in full.

How should I dress for shore excursions?

For every excursion, we recommend dressing in layers and wearing comfortable, water-resistant shoes. Pack a raincoat or water-resistant jacket. Even on cloud-free days, rain can appear out of nowhere.

For glacier helicopter tours and glacier dog sledding, a warm coat, warm pants, and close-toed shoes are recommended. Bring along gloves, a hat, and sunglasses. If you get cold easily, we recommend wearing a base layer. Snowpants and snowboots are not necessary. You will be outfitted with traction overboots that will keep your street shoes dry and provide added traction.

Does the weather vary by port?

Yes, there is some variation in the weather for each port. Average daily temperatures are similar across ports, but rainfall varies by location. Ketchikan is one of the rainiest towns in the United States, and in 2025 received over 146 inches of rain. Juneau received 62 inches of rain in 2025, while Skagway, surrounded by protected coastal mountains, sees the fewest rainy days in Southeast Alaska.

Ketchikan Rain Gauge, AK (Photo / CC BY)