Alcatraz Island Weather Forecast
Alcatraz Island weather: 62°F, overcast. Hourly forecast, 14-day outlook, UV, air quality and the best time to visit.
Summary
Alcatraz Island is a tourist attraction in San Francisco. Alcatraz Island is a landmark known for the former federal prison in the bay.
Right now it is 62°F (16°C) in Alcatraz Island with overcast. It feels like 59°F. Today runs from 57°F to 69°F. Chance of precipitation is 2%. Sightseeing conditions score 9.2/10 - excellent - go now.
The best time to visit Alcatraz Island is May, June, July, August, September and October. The climate is temperate. January, February and December tend to be the least comfortable months. October is the warmest month with average highs near 71°F, while January is the coldest with lows near 46°F.
The closest major airport is San Francisco International Airport (SFO), about 14 mi away. Nearby highlights include Golden Gate Bridge, Point Lobos State Natural Reserve, Pinnacles National Park and Julia Pfeiffer Burns State Park.
In plain terms. Today is about average for August. The forecast high of 69°F is in line with the 69°F typical for this month. The best window to be outside is roughly 1 PM to 4 PM, when temperature, rain chance and wind line up best. sightseeing is the strongest bet in Alcatraz Island today at 9.2/10. No weather-related travel disruption is expected today. Roads and airports should run normally.
Compiled from this page's own data: atlas facts plus live Open-Meteo readings.
Weather in Alcatraz Island right now
Source: Open-Meteo. Updated 5:52 PM, Aug 24 local time.
Next 24 hours
Hour-by-hour temperature, precipitation chance and wind.
16-day forecast for Alcatraz Island
Daily highs and lows, precipitation and UV.
| Day | Conditions | High / Low | Precip | Wind | UV |
|---|---|---|---|---|---|
| Mon, Aug 24 | 🌥️ Fog | 69° / 57° | 2% | 16 mph | 8 |
| Tue, Aug 25 | 🌥️ Fog | 68° / 57° | 0% | 18 mph | 7 |
| Wed, Aug 26 | ☁️ Overcast | 74° / 56° | 0% | 9 mph | 8 |
| Thu, Aug 27 | ☁️ Overcast | 73° / 61° | 3% | 11 mph | 7 |
| Fri, Aug 28 | ☁️ Overcast | 69° / 59° | 7% | 13 mph | 7 |
| Sat, Aug 29 | ☁️ Overcast | 65° / 59° | 0% | 19 mph | 7 |
| Sun, Aug 30 | ☁️ Overcast | 65° / 58° | 0% | 16 mph | 6 |
| Mon, Aug 31 | ☁️ Overcast | 65° / 58° | 2% | 14 mph | 7 |
| Tue, Sep 1 | ☁️ Overcast | 67° / 60° | 2% | 14 mph | 7 |
| Wed, Sep 2 | ☁️ Overcast | 72° / 59° | 2% | 9 mph | 7 |
| Thu, Sep 3 | ☁️ Overcast | 73° / 58° | 1% | 11 mph | 7 |
| Fri, Sep 4 | ☁️ Overcast | 70° / 58° | 6% | 13 mph | 7 |
| Sat, Sep 5 | ☁️ Overcast | 76° / 58° | 0% | 10 mph | 7 |
| Sun, Sep 6 | ⛅ Partly cloudy | 72° / 61° | 3% | 11 mph | 7 |
| Mon, Sep 7 | ☀️ Clear sky | 71° / 59° | 6% | 9 mph | 7 |
| Tue, Sep 8 | ☀️ Clear sky | 78° / 58° | 3% | 7 mph | 7 |
Climate in Alcatraz Island month by month
Average high, average low and total rainfall, based on three years of reanalysis data.
| Month | Avg high | Avg low | Rainfall | Rating |
|---|---|---|---|---|
| January | 58° | 46° | 3,3 in | ★★★☆☆ |
| February | 59° | 47° | 5,6 in | ★★★☆☆ |
| March | 64° | 50° | 3,0 in | ★★★★☆ |
| April | 63° | 50° | 2,0 in | ★★★★☆ |
| May | 65° | 52° | 0,6 in | ★★★★★ |
| June | 66° | 54° | 0,0 in | ★★★★★ |
| July | 65° | 55° | 0,1 in | ★★★★★ |
| August | 69° | 57° | 0,0 in | ★★★★★ |
| September | 69° | 58° | 0,2 in | ★★★★★ |
| October | 71° | 55° | 0,7 in | ★★★★★ |
| November | 62° | 50° | 4,1 in | ★★★☆☆ |
| December | 57° | 47° | 5,8 in | ★★★☆☆ |
Climate type: Temperate. Source: Open-Meteo archive (ERA5).
Weather map for Alcatraz Island
Animated model layers. Pick a layer to load it.
Animated layers by Windy. For pin-level detail and nearby places, see the interactive map below.
Air quality and pollen in Alcatraz Island
Air quality: Open-Meteo (CAMS). US AQI scale.
Sun, twilight and moon
Golden and blue hour are the standard photographic approximation around sunrise and sunset.
Best time to visit Alcatraz Island
Go in May, June, July, August, September and October. These months score highest on comfortable temperatures, low rainfall and useful daylight.
Hardest months: January, February and December - expect the least comfortable mix of heat, cold or rain.
Explore Alcatraz Island
Every topic we hold for this place, and the same topic for the places around it.
Weather for related places
Frequently asked questions
Where is Alcatraz Island?
Alcatraz Island is a tourist attraction in San Francisco. Its coordinates are 37.8267, -122.423. It lies in North America.
What is the weather like in Alcatraz Island right now?
It is currently 62°F (16°C) with overcast. Humidity is 91% and wind is 14 mph.
When is the best time to visit Alcatraz Island?
May, June, July, August, September and October offer the most comfortable conditions in Alcatraz Island, which has a temperate climate. January, February and December are usually the hardest months for outdoor plans.
What time zone is Alcatraz Island in?
Alcatraz Island observes America/Los_Angeles (UTC-07:00). The local time is 5:52 PM.
What is the nearest airport to Alcatraz Island?
The closest airports are San Francisco International Airport (SFO), 14 mi away.
What are the top things to do in Alcatraz Island?
Popular options include Golden Gate Bridge, Point Lobos State Natural Reserve, Pinnacles National Park, Julia Pfeiffer Burns State Park, Emerald Bay State Park and Lake Tahoe.
Related articles
Lawyer for Puka Nacua’s Alleged Victim Releases Photo Revealing the Severity of Bite Mark
Where Does Philip Rivers Live? Inside the NFL Legend’s Home, Family Life,
Brandon Aiyuk Posted Video Speeding Past 49ers Stadium
President Donald Trump NBC News Interview : He talks about the economy, the ongoing war with IranData sources and methodology
| Place data | USPOTUS Atlas dataset (attractions) - coordinates, hierarchy and facts. |
|---|---|
| Forecast and observations | Open-Meteo (ECMWF and national models). |
| Air quality and pollen | Copernicus CAMS via Open-Meteo. US AQI scale. |
| Climate averages | ERA5 reanalysis via the Open-Meteo archive, aggregated over 3 years. |
| Official alerts | US National Weather Service. |
| Method | Scores, comparisons and advice on this page are computed from the inputs above. Distances are straight-line. Nothing is estimated where data is missing - the block is simply not shown. |
Last updated August 24, 2026 at 5:52 PM local time. Live blocks refresh every 15 minutes; climate averages monthly.
