As the Alaska cruise season approaches, travelers are weighing their options and determining which month might be best suited for their voyage.
Royal Caribbean offers cruises from May through September, with the warmest temperatures typically found in June, July, and August.
Despite popular beliefs about cold weather, Alaska’s climate can be quite variable, influenced significantly by the latitude of the areas being visited.
Here’s a detailed overview of what one can expect in terms of weather for each month during the Alaska cruise season.
**May: The Shoulder Season Begins**
May marks the start of the Alaska cruise season, often referred to as the “shoulder season” due to lower demand compared to later months.
Cruisers can anticipate cool and rainy weather, with temperatures typically ranging from the upper 50s to the low 60s.
Rain is a primary concern during May, as this month tends to be wetter than the summer months that follow.
Though it can be quite chilly and misty, the upside is that travelers will generally find more attractive prices for Alaska cruises during this time.
**June: Mild Temperatures Arrive**
As the month progresses into June, Alaskan weather shows promising signs of mild temperatures becoming more consistent.
Expect daytime highs to range from the mid-50s to mid-60s, but temperatures can drop in the mornings and evenings, necessitating layered clothing.
While June sees a fair share of rain, it is notably drier than May.
If traveling to glacial areas, don’t be surprised by colder temperatures, possibly dropping into the 30s or 40s due to wind and sun exposure.
A warm jacket is highly recommended to combat the cooler breeze and occasional rain on deck.
**July: The Peak of Summer**
July represents the peak of summer in Alaska, bringing some of the warmest temperatures.
In Southeast Alaska, expect daytime highs in the low to mid-70s, especially when the sun is shining, making it the ideal time for outdoor activities.
Despite the warm conditions, mornings and evenings can still feel cooler.
Travelers should consider packing a light jacket to stay comfortable during transitional temperatures.
**August: Mild Yet Moist**
As we transition into August, visitors will find the weather remains generally mild and pleasant.
The early part of the month usually sees highs in the 60s, with occasional spikes into the high 70s during clear spells.
However, travelers should also be prepared for the region’s rainy season, as frequent showers are expected.
High humidity levels and foggy mornings can also be part of the experience, especially near coastal areas.
On the bright side, regions such as Sitka and Juneau enjoy 15-16 hours of daylight, providing ample opportunity to explore and engage in activities.
**September: The Colder Transition**
September signals a noticeable drop in temperatures, making it one of the colder months for an Alaskan cruise, akin to May.
The weather during this time can be unpredictable, featuring a mix of cooler conditions, intermittent rain, and bursts of sunshine.
Expect temperatures to generally fluctuate between the low 40s to mid-50s, with increased chances of rain as the month progresses.
Despite the chill, September is an excellent time to witness wildlife, including bears and whales, adding another layer of excitement to the journey.
While the weather may deter some, those willing to embrace the conditions will find significant savings on cruise fares during September compared to peak months.
In conclusion, the weather conditions during the Alaska cruise season vary widely from month to month.
Ultimately, each period offers a unique experience, appealing to different traveler preferences when it comes to climate and wildlife viewing.
image source from：https://www.royalcaribbeanblog.com/2025/06/08/alaska-weather-month-by-month
