Current Conditions

Alerts

 

Environmental Conditions

Weather

The weather on Alcatraz is unpredictable and liable to change unexpectedly, so be prepared by bringing along a light jacket or sweater no matter how nice the day starts out. Cold, foggy mornings may give way to sunny afternoons, which in turn can shift quickly back to more fog and blustery winds.

Air Quality & Smoke

Air quality can vary quite a bit in an urban environment like the San Francisco Bay Area. Inversions can trap smog from motor vehicles and industry, especially during winter months. During summer and fall, ozone and smoke from wildfires can degrade the air quality, reducing visibility and posing a health concern, especially for sensitive people.

Last updated: January 15, 2026

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Contact Info

Mailing Address:

Alcatraz Island
Golden Gate National Recreation Area
201 Fort Mason

San Francisco, CA 94123

Phone:

415-561-4900
United States Park Police Dispatch: Non-Emergency: 415-561-5505 Emergency: 415-561-5656

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