Glacier Bay in May: Crowds, Weather & What to Pack
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May is one of the best months of the year to visit Glacier Bay National Park: crowds run 70% of the July peak (82,478 average visits). Weather: highs average 52°F and lows 41°F, with 4.7″ of precipitation and 16.8 hours of daylight. Computed from NPS and NOAA data.
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Bring for Glacier Bay in May
- Warm mid-layer (fleece or light puffy)See it on AmazonWhy: mornings average 41°F.
- Rain shell + pack coverSee it on AmazonWhy: 4.7″ of precipitation is normal this month.
- Waterproof boots — plus navigation and a basic first-aid kitSee it on AmazonWhy: 4.7″ of rain is normal this month.
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Crowds in May
Glacier Bay averages 82,478 recreation visits in May — 70% 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 52°F), and mornings are chilly (lows average 41°F). This is one of the wetter months (4.7″ of precipitation on average). Mid-month daylight runs 16.8 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 May.
What to pack for Glacier Bay in May
Computed from the month's weather normals above — not a generic list.
- Warm mid-layer (fleece or light puffy) — mornings average 41°F
- Rain shell + pack cover — 4.7″ of precipitation is normal this month
- Waterproof boots — plus navigation and a basic first-aid kit — 4.7″ of rain is normal this month
- Bear spray — recommended by the park in grizzly country (check current park regulations before you carry)
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Also at their best in May
Other parks whose computed May verdict is a best window — same NPS × NOAA formula:
- Lake Clark in May — 7% of peak crowds, highs 59°F, score 96/100
- North Cascades in May — 11% of peak crowds, highs 69°F, score 96/100
- Katmai in May — 1% of peak crowds, highs 52°F, score 95/100
- Gates of the Arctic in May — 12% of peak crowds, highs 56°F, score 94/100
Common questions
Is Glacier Bay crowded in May?
Yes — May runs 70% of Glacier Bay's peak, averaging 82,478 recreation visits (NPS, 2021–2025).
What is the weather like in Glacier Bay in May?
Average highs of 52°F, lows of 41°F, 4.7″ of precipitation (NOAA 1991–2020 normals, ELFIN COVE, AK US station).
What should I pack for Glacier Bay in May?
Warm mid-layer (fleece or light puffy); Rain shell + pack cover; Waterproof boots — plus navigation and a basic first-aid kit — the full weather-computed list is on this page.
See also: the best national parks to visit in May · Last verified 2026-09-24