Channel Islands in May: Crowds, Weather & What to Pack
Best window · VisitWhen score 72/100 · #2 of 12 months
May is one of the best months of the year to visit Channel Islands National Park: crowds run 72% of the July peak (25,871 average visits), days average 68°F with 13.9 hours of daylight. Computed from NPS and NOAA data.
Crowds in May
Channel Islands averages 25,871 recreation visits in May — 72% 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 68°F), and nights stay mild (lows average 52°F). It is typically dry (0.4″ of precipitation). Mid-month daylight runs 13.9 hours.
NOAA 1991–2020 monthly normals, station POINT MUGU NF, CA US (43 mi from park coordinates, 13 ft elevation) — conditions vary inside the park, especially with elevation. Daylight computed for the 15th of May.
What to pack for Channel Islands in May
Computed from the month's weather normals above — not a generic list.
- Sturdy broken-in footwear, navigation and a basic first-aid kit — every park, every month
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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 Channel Islands crowded in May?
Yes — May runs 72% of Channel Islands's peak, averaging 25,871 recreation visits (NPS, 2021–2025).
What is the weather like in Channel Islands in May?
Average highs of 68°F, lows of 52°F, 0.4″ of precipitation (NOAA 1991–2020 normals, POINT MUGU NF, CA US station).
What should I pack for Channel Islands in May?
Sturdy broken-in footwear, 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 2026-09-12