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"Great weather, salmon running"
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Juneau is Alaska's capital, and you can reach it only by sea or air. It sits between steep coastal mountains and the Inside Passage, within reach of whale watching, glacier hikes, and float-plane trips. The Mendenhall Glacier is just 12 miles from downtown, one of the easier glaciers in the world to reach on a port day.
Juneau in August brings cooler conditions, with highs around 63°F, so pack layers alongside your warm-weather gear. August sees roughly 17 rainy days, so waterproof layers and flexible plans are wise. Showers are often short-lived but can be intense. Great weather, salmon running
This is one of the most popular months to visit Juneau, so book shore excursions early. The top snorkeling spots and tours sell out fast. Dress in layers: a waterproof shell over a mid-layer handles the range between cool mornings and afternoon port temps.
Voyage of the Glaciers Grand Adventure
Princess Cruises · Aug 15, 2026
Alaska Inside Passage & Glacier
Carnival Cruises · Aug 17, 2026
Voyage of the Glaciers Grand Adventure
Princess Cruises · Aug 19, 2026
Seward (Anchorage, Alaska) To Vancouver
Silversea Cruises · Aug 20, 2026
Alaska Inside Passage & Glacier
Carnival Cruises · Aug 20, 2026
Alaska: Inside Passage & Glacial Fjords
Virgin Voyages Cruises · Aug 20, 2026
The average high temperature in Juneau during August is 63°F, with a low of 50°F.
Juneau typically sees 17 days of rain in August. Great weather, salmon running
For a August cruise to Juneau, you should pack layers, a light jacket, and comfortable walking shoes.