Glacier Bay in August: Crowds, Weather & What to Pack
Peak crowds · VisitWhen score 50/100 · #10 of 12 months
August is peak season — the 2nd-busiest month of the year, at Glacier Bay National Park: crowds run 98% of the July peak (114,531 average visits). Weather: highs average 59°F and lows 50°F, with 7.9″ of precipitation and 15.5 hours of daylight. Computed from NPS and NOAA data.
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Bring for Glacier Bay in August
- Rain shell + pack coverSee it on AmazonWhy: 7.9″ of precipitation is normal this month.
- Waterproof bootsSee it on AmazonWhy: 7.9″ 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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Glacier Bay in August: what the park service says
August is the last month of Glacier Bay's private-boat permit season, which runs to August 31. Most visitors see the park from the water, on anything from a large cruise ship to a single kayak, and the park counts 274 bird species seen here. The tide range is huge: up to 24 feet of water flows in or out of the bay every six hours.
Source: NPS 1, NPS 2, NPS 3, checked 2026-11-05.
Crowds in August
Glacier Bay averages 114,531 recreation visits in August — 98% of what July, the peak month, draws. Plan lodging and entries with that in mind — book early and start days at dawn.
Weather & daylight
Expect cool days (highs average 59°F), and nights stay mild (lows average 50°F). This is one of the wetter months (7.9″ of precipitation on average). Mid-month daylight runs 15.5 hours.
NOAA 1991–2020 monthly normals, station ELFIN COVE, AK US (42 mi from park coordinates, 20 ft elevation) — conditions vary inside the park, especially with elevation. Daylight computed for the 15th of August.
What to pack for Glacier Bay in August
Computed from the month's weather normals above — not a generic list.
- Rain shell + pack cover — 7.9″ of precipitation is normal this month
- Waterproof boots — plus navigation and a basic first-aid kit — 7.9″ 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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Looking for a better window? The computed best months for Glacier Bay are April and May.
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 Glacier Bay crowded in August?
Yes — August runs 98% of Glacier Bay's peak, averaging 114,531 recreation visits (NPS, 2021–2025). See every month at Glacier Bay.
What is the weather like in Glacier Bay in August?
Average highs of 59°F, lows of 50°F, 7.9″ of precipitation (NOAA 1991–2020 normals, ELFIN COVE, AK US station). Compare it with other national parks in August.
What should I pack for Glacier Bay 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? Glacier Bay in September has its own list.
See also: the best national parks to visit in August · Last verified 2026-09-24