Alcatraz
Alcatraz Island is the 22-acre rocky outcrop in San Francisco Bay, 2 km north of Fisherman's Wharf, that operated as the most notorious federal prison in the United States from 1934 to 1963. The island's fortress, cellblock, and lighthouse — plus the harsh tidal currents that supposedly made escape impossible — became one of America's most-visited historic sites after the National Park Service opened it to the public in 1973. Visits run by Alcatraz City Cruises (the official concessionaire) from Pier 33; the 15-minute ferry ride is followed by a self-guided cell-house audio tour narrated by former inmates and guards. Tickets sell out 4-12 weeks in advance during peak season. Climate-wise, plan for San Francisco's classic microclimate: cool maritime conditions year-round (highs rarely above 21°C), heavy fog April–August ("Karl the Fog" rolls in from the Pacific most summer afternoons), and the clearest skies actually in September–October.
Plan your trip from
Climate, scoring, and month-by-month planning live on the page for the city you'd actually stay in:
When to go
Alcatraz shares San Francisco's climate, so these are San Francisco's measured numbers — see the full month-by-month breakdown.
San Francisco, United States
Best months: October, September, August
Tours & map
Tours and the map below are for San Francisco — the planning hub for Alcatraz isSan Francisco, and Viator's catalog is keyed to cities rather than sub-locales, regions, or single attractions.
Tours in San Francisco
29 top-rated tours via Viator. Booking links earn this site a commission at no cost to you. Map locations are approximate (centred on San Francisco).
- 1
Golden Gate Bridge Muir Woods Sausalito with Optional Alcatraz - 2
Small Group: Ultimate Napa & Sonoma Wine Tour from San Francisco - 3
San Francisco Bay Sailing Cruise - 4
Vantigo - The Original San Francisco VW Bus Tour - 5
San Francisco Movie Sights City Tour - 6
Napa and Sonoma Wine Country Full-Day Tour from San Francisco - 7
Yosemite National Park: Full Day Tour from San Francisco - 8
Napa and Sonoma Wine Tour from San Francisco - 9
San Francisco, Muir Woods, Sausalito and Optional Alcatraz Tour - 10
San Francisco City Tour, Muir Woods & Sausalito: Half or Full Day - 11
San Francisco Grand City Tour - 12
Muir Woods and Sausalito Tour (Return by Bus or Ferry) - 13
Muir Woods and Sausalito Morning Tour Small-Group Half Day - 14
Monterey, Carmel and 17-Mile Drive: Full Day Tour from SF - 15
2hr. INTERACTIVE Sailing Experience on San Francisco Bay - 16
San Francisco Fire Engine Tour - 17
Alcatraz Plus San Francisco City Combo Tour - 18
Alcatraz Tour + 90 min San Francisco City Open Air Van Tour - 19
Small Group Yosemite and Giant Sequoias Day Trip from San Francisco - 20
San Francisco Love Tour - 21
Chinatown & North Beach\Little Italy: 7 Tastings & History - 22
Painted Ladies San Francisco City Tour - 23
Small-Group Wine Country Tour from San Francisco with Tastings - 24
Skip The Bus: San Francisco By Luxury Van Tour - 25
North Beach & Little Italy Walking Tour: Food, History & Flavor - 26
Chinatown Walking Tour: Food, History & Flavor - 27
San Francisco: The Mission District Food Tour with 5 Local Dishes - 28
Muir Woods and Sausalito Small-Group Tour - 29
Private Tour to Monterey, Carmel, 17-Mile Drive, Pebble Beach
Last refreshed 2026-05-25.
Common questions
- When is the best time to visit Alcatraz?
- September–October has the clearest skies and best photographic conditions (San Francisco fog mostly lifts by then). Early morning ferries year-round have lower crowds. Avoid mid-summer afternoons (fog + crowds). November–March is genuinely quiet but bring layers — the island is windy and 5°C colder than the city.
- How far in advance do I need to book Alcatraz tickets?
- Day tour: 4–8 weeks ahead in summer, 1–2 weeks in winter. Night tour: 8–12 weeks ahead year-round (limited capacity, sells out fastest). Behind-the-Scenes and Alcatraz Family Tour: 12+ weeks. Only Alcatraz City Cruises sells legitimate tickets — beware third-party resellers.
- How long does an Alcatraz visit take?
- Allow 2.5–3 hours total — 15 min ferry each way, plus 90 min cell house audio tour, plus optional landscape walk. The last ferry leaves Alcatraz around 6:30 PM in summer, 4:30 PM in winter. You can stay as long as you like and catch any return ferry.
- Is the climate at Alcatraz different from San Francisco?
- Slightly colder and much windier — figure 4–6°C cooler than downtown SF, with stronger marine layer exposure. Dress warmly year-round, even in July. See the San Francisco page for the full climate-month scoring; the island's micro-conditions are otherwise identical.