Katmai in August: Crowds, Weather & What to Pack
Peak crowds · VisitWhen score 67/100 · #5 of 12 months
August is peak season — the 2nd-busiest month of the year, at Katmai National Park: crowds run 79% of the July peak (9,914 average visits). Weather: highs average 61°F and lows 45°F, with 4.4″ of precipitation and 15.5 hours of daylight. Computed from NPS and NOAA data.
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Bring for Katmai in August
- Rain shell + pack coverSee it on AmazonWhy: 4.4″ of precipitation is normal this month.
- Waterproof bootsSee it on AmazonWhy: 4.4″ of precipitation is normal this month.
- Bear spraySee it on AmazonWhy: recommended by the park in grizzly country (check current park regulations before you carry).
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Crowds in August
Katmai averages 9,914 recreation visits in August — 79% of what July, the peak month, draws. Trailheads and parking fill accordingly — book early and start days at dawn.
Weather & daylight
Days are mild (highs average 61°F), and nights stay mild (lows average 45°F). This is one of the wetter months (4.4″ of precipitation on average). Mid-month daylight runs 15.5 hours.
NOAA 1991–2020 monthly normals, station KING SALMON 42 SE, AK US (39 mi from park coordinates, 661 ft elevation) — conditions vary inside the park, especially with elevation. Daylight computed for the 15th of August.
What to pack for Katmai in August
Computed from the month's weather normals above — not a generic list.
- Rain shell + pack cover — 4.4″ of precipitation is normal this month
- Waterproof boots — plus navigation and a basic first-aid kit — 4.4″ of precipitation is normal this month
- Bear spray — recommended by the park in grizzly country (check current park regulations before you carry)
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If your dates are flexible, consider shifting: The computed best months for Katmai are May and June.
Also at their best in August
Other parks whose computed August verdict is a best window — same NPS × NOAA formula:
- Guadalupe Mountains in August — 28% of peak crowds, highs 84°F, score 80/100
- Lassen Volcanic in August — 56% of peak crowds, highs 78°F, score 77/100
- Bryce Canyon in August — 81% of peak crowds, highs 78°F, score 68/100
- Redwood in August — 85% of peak crowds, highs 66°F, score 67/100
Common questions
Is Katmai crowded in August?
Yes — August runs 79% of Katmai's peak, averaging 9,914 recreation visits (NPS, 2021–2025). See every month at Katmai.
What is the weather like in Katmai in August?
Average highs of 61°F, lows of 45°F, 4.4″ of precipitation (NOAA 1991–2020 normals, KING SALMON 42 SE, AK US station). Compare it with other national parks in August.
What should I pack for Katmai in August?
Rain shell + pack cover; Waterproof boots — plus navigation and a basic first-aid kit; Bear spray — the full weather-computed list is on this page. Going in September instead? Katmai in September has its own list.
See also: the best national parks to visit in August · Last verified 2026-09-24