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Loading Travel Forecast…Loading Travel Forecast…Loading Travel Forecast…Historical averages and packing recommendations for your September visit to Ketchikan.
"Rain picking up, silver salmon"
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Averaged from the last five years of September readings — a guide to what to expect, not a forecast for a particular sailing.
Ketchikan is Alaska's southernmost cruise port and often the first stop on an Inside Passage sailing. The town sits on Revillagigedo Island, known for its salmon runs, its totem pole collections, and the surrounding Tongass National Forest. Creek Street, a boardwalk raised on pilings over a salmon stream, runs through the old part of town.
Ketchikan in September brings cooler conditions, with highs around 59°F, so pack layers alongside your warm-weather gear. September sees roughly 20 rainy days, so waterproof layers and flexible plans are wise. Showers are often short-lived but can be intense. Rain picking up, silver salmon
Crowds are moderate in September, making it a good balance between availability and weather. Dress in layers: a waterproof shell over a mid-layer handles the range between cool mornings and afternoon port temps.
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The average high temperature in Ketchikan during September is 59°F, with a low of 47°F.
Ketchikan typically sees 20 days of rain in September. Rain picking up, silver salmon
For a September cruise to Ketchikan, you should pack warm layers, a waterproof jacket, and thermal wear.