Reservations are required at all times, as hostels and campsites fill quickly. Camping is also available at Angel Island State Park , which is in the middle of San Francisco Bay. San Francisco and Marin County both have world-class hotels and other types of lodging. Weather by 4 Day Forecast More Weather from Intellicast . The climate is Mediterranean, so it tends to be windy and cold throughout much of the park.
Summers are foggy, with the best weather in spring and fall.
Dress in layers. Hiking boots are appropriate in some areas. Comfortable shoes are recommended in San Francisco, since you'll probably be walking on asphalt or sidewalks. A day's trip will provide enough time to visit any area of the park. Ferries provide transportation to Alcatraz and Angel Island.