If you're thinking about taking a cruise to Alaska, the month you choose to sail could have vastly different weather from another month.
Royal Caribbean sails its ships to Alaska between May and September, with the warmest months usually June, July, and August.
You might imagine it being cold on an Alaska cruise, but the reality is the weather can vary greatly, especially the further north or south you go.
Here's a look at the typical weather each month of the Alaska cruise season, and what temperatures to expect.
Alaska Cruise Weather in May
The opening of the Alaska cruise season is referred to as the "shoulder season", because it's at the beginning and tends to be less in demand than other months.
May weather tends toward cold and rainy, with high temperatures in the upper 50s, low 60s.
Rain is the top weather concern for a cruise in May because it's wetter than the summer months that follow.
It will be chilly and misty, but you'll likely find much lower prices for an Alaska cruise in May compared to any other month.
Alaska Cruise Weather in June
June weather in Alaska brings the the first batch of reliably mild temperatures to the region. Expect temperatures to range between mid-50s to mid-60s, but it will be cooler in the morning or evening.
When it's raining, expect it to be chilly as well, as being wet always makes it feel chillier. June is dry, but it can still rain a bit.
Likewise, the breeze while you're outside on your ship will feel cooler too. This is why dressing in layers is so important to be prepared for rain.
If you're headed to a glacier, then expect even colder temperatures. It could be as cold as the 30s or 40s, depending on wind and sun exposure.
I'd recommend packing a warm jacket
Alaska Cruise Weather in July
The peak of summer brings the warmest temperatures, and July weather is about as good as it gets for being outdoors.
Expect temperatures around Southeast Alaska to reach the low to mid-70s, especially on sunny days. You might even need shorts on a cruise this month!
While it's likely going to be warmest on a July cruise, that doesn't mean it won't be cooler in the mornings or evenings.
It's still a good idea to pack a light jacket to start out your day, as well as to wear around the ship's decks when sailing.
Alaska Cruise Weather in August
In August, the weather in Alaska is generally mild and pleasant, but expect a mix of cool, wet, and occasionally sunny weather.
The first week of August in Southeast Alaska usually brings highs in the 60s and sometimes even into the high 70s if you get lucky with sun. Mornings and evenings can dip into the 50s.
August is part of the rainy season in Southeast Alaska, so expect frequent rain showers. Humidity levels are generally high, and mornings can be foggy, especially near the coast.
You'll also have plenty of sunlight, as towns like Sitka or Juneau experience 15-16 hours of daylight per day. That's good for having time to see and do it all each day.
Alaska Cruise Weather in September
September is one of the colder months to sail to Alaska, similar to May.
September weather in Southeast Alaska can be unpredictable. You’ll likely see cooler temperatures, rain, and possibly some sunshine. During this time, temperatures can range from the low 40s to the mid-50s, and the chances of rain are very high.
While it's likely going to be rainier and colder than other summer months, the sun will still shine. Plus, September is one of the best months to see bears and whales.
Don't let the colder weather stop you. Be prepared with the right clothes, a positive attitude, and remember how much money you're saving going in September compared to earlier.
