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 bootsSee it on AmazonWhy: 4.7″ of precipitation is normal this month.
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Glacier Bay in May: what the park service says
May is when Glacier Bay's season begins. The park dates its main visitor season from late May through early September, and travel options from May through September include scheduled and charter flights, Alaska Marine Highway ferries, cruise ships, tour boats and charters. From May 1, all vessels must radio KWM20 Bartlett Cove or call 907-697-2627 before entering or leaving park waters. Bartlett Cove gets about 70 inches of precipitation a year, and the park calls April, May and June usually the driest months.
Source: NPS 1, NPS 2, NPS 3, checked 2026-11-05.
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 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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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). See every month at Glacier Bay.
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). Compare it with other national parks in May.
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. Going in June instead? Glacier Bay in June has its own list.
See also: the best national parks to visit in May · Last verified 2026-09-24