About Katmai Weather
Katmai National Park features "typical" Alaska weather. Winters, early spring, and late fall are cold and snowy. Summers are rainy, overcast, and unpredictable. The National Park Service estimates that the skies are clear about 20% of the time in summer. Rain can last for days at a time. Strong winds are also common, and can occasionally gust to 50-60 miles per hour. The statistics below are taken from King Salmon, Alaska, located just west of the park boundary and the sites of the park's headquarters.
Visitation Seasons
Although temperatures in most of Katmai are not as low as many other areas of Alaska, spring is still mostly a time of quiet. Only in the last few weeks of the season, in June, does visitation really start. Most park services start up early June.
Summer is the time virtually all visitation to Alaska occurs, and Katmai is no exception. The entire season sees heavy visitation, with the month of July being by far the busiest. The world famous brown bears fishing at Brooks Falls is at its highest in July. Activities trail off as the season closes, with a second bear season on the Brooks River happening in September.
By the time autumn arrives, the visitation season is pretty much over in Katmai. Winter starts to reclaim the landscape, albeit a bit slower than in many other parts of Alaska. Most activities have ended and facilities have closed.
Winter is a time of extreme quiet in Alaska's parks, including Katmai. It may be difficult to even get to the park area, let alone do anything. Winter is not the time to come to Katmai.
