Nearby Harbors
37.8267’ N, 122.4170’ W

Alcatraz Island, CA

53°
H 65°
L 51°
N
3mph
Low tide
6:12 am
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Alcatraz Island, CA Weather Forecast and Current Conditions

Day Sky High / Low Precip Wind Humidity
Sun
Oct 11 		Sunny
Close Hourly 		65º / 51º 2% WSW 16 mph 72%
6am Mostly Clear 53º 2% N 3 mph 83%
7am Mostly Clear 52º 2% N 3 mph 85%
8am Mostly Sunny 53º 2% NE 3 mph 87%
9am Sunny 54º 2% SSW 4 mph 87%
10am Sunny 58º 1% S 5 mph 77%
11am Sunny 60º 1% SSW 7 mph 70%
12pm Sunny 62º 1% SW 10 mph 65%
1pm Sunny 64º 1% WSW 12 mph 62%
2pm Sunny 64º 1% WSW 15 mph 59%
3pm Sunny 64º 2% WSW 16 mph 60%
4pm Sunny 63º 2% WSW 15 mph 61%
5pm Sunny 62º 2% WSW 14 mph 62%
6pm Sunny 61º 3% WSW 12 mph 67%
7pm Clear 59º 4% SW 10 mph 75%
8pm Clear 58º 5% S 9 mph 77%
9pm Clear 57º 5% S 9 mph 79%
10pm Clear 57º 5% S 8 mph 79%
11pm Clear 56º 5% S 6 mph 81%
Mon
Oct 12 		Sunny
View Hourly 		68º / 51º 8% W 14 mph 67%
12am Clear 56º 6% SSE 6 mph 82%
1am Partly Cloudy 55º 6% SSE 5 mph 83%
2am Mostly Clear 55º 6% SE 6 mph 84%
3am Mostly Clear 55º 6% ESE 6 mph 84%
4am Clear 54º 6% E 4 mph 87%
5am Clear 53º 6% E 4 mph 88%
6am Clear 53º 6% E 3 mph 88%
7am Clear 52º 6% ENE 3 mph 89%
8am Sunny 53º 6% NE 4 mph 87%
9am Sunny 56º 4% NE 4 mph 80%
10am Sunny 59º 3% NE 4 mph 73%
11am Sunny 61º 2% S 5 mph 62%
12pm Sunny 63º 2% WSW 6 mph 60%
1pm Sunny 65º 8% WSW 8 mph 56%
2pm Sunny 66º 7% WSW 10 mph 56%
3pm Sunny 66º 8% W 12 mph 55%
4pm Mostly Sunny 66º 7% W 14 mph 57%
5pm Sunny 65º 3% W 14 mph 59%
6pm Sunny 63º 7% W 13 mph 64%
7pm Mostly Clear 61º 13% W 11 mph 72%
8pm Mostly Clear 59º 12% W 9 mph 76%
9pm Mostly Clear 58º 10% WNW 7 mph 78%
10pm Mostly Clear 57º 9% WNW 6 mph 80%
11pm Partly Cloudy 56º 10% WNW 4 mph 83%
Tue
Oct 13 		AM Fog/PM Sun
View Hourly 		70º / 52º 20% NNW 14 mph 60%
12am Partly Cloudy 56º 9% W 4 mph 86%
1am Partly Cloudy 55º 8% WNW 4 mph 88%
2am Partly Cloudy 55º 8% W 3 mph 88%
3am Partly Cloudy 54º 7% WNW 3 mph 90%
4am Partly Cloudy 54º 7% N 2 mph 90%
5am Partly Cloudy 53º 20% NNE 2 mph 92%
Wed
Oct 14 		Partly Cloudy 72º / 53º 18% N 11 mph 65%
Thu
Oct 15 		Partly Cloudy 81º / 56º 18% NNE 10 mph 52%
Fri
Oct 16 		Sunny 82º / 55º 4% N 10 mph 47%
Sat
Oct 17 		Sunny 76º / 55º 4% NNW 11 mph 60%
Sun
Oct 18 		Partly Cloudy 69º / 54º 18% W 13 mph 72%

Weather Radar for Alcatraz Island, CA See Radar

See Radar Map

* Playback displays weather for the past 6 hours.

NOAA Weather Marine Forecast for Alcatraz Island, CA

Today
High : 59ºF
Variable winds less than 5 kt becoming WSW 11 to 16 kt in the morning. Sunny.
Tonight
Low : 54ºF
SSW wind 9 to 12 kt becoming SE after midnight. Mostly clear.
Columbus Day
High : 59ºF
SE wind 6 to 11 kt becoming WSW in the afternoon. Winds could gust as high as 18 kt. Sunny.
Monday Night
Low : 54ºF
WSW wind 10 to 15 kt becoming variable and less than 5 kt after midnight. Mostly clear.
Tuesday
High : 61ºF
Variable winds less than 5 kt becoming W 5 to 10 kt in the afternoon. Sunny.
Tuesday Night
Low : 55ºF
WSW wind 11 to 16 kt decreasing to 5 to 10 kt after midnight. Mostly clear.
Wednesday
High : 62ºF
Variable winds less than 5 kt becoming W around 6 kt in the afternoon. Sunny.
Wednesday Night
Low : 56ºF
W wind 7 to 12 kt becoming variable and less than 5 kt in the evening. Mostly clear.
Thursday
High : 68ºF
Variable winds less than 5 kt becoming NE 5 to 7 kt in the morning. Sunny.

NOAA Buoy Data Near Alcatraz Island, CA See Map

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    Wind Speed Forecast for Alcatraz Island, CA

    SundayMondayTuesday
    Wind Speed (MPH) 3515128634101363
    1pm5pm9pm1am5am9am1pm5pm9pm1am5am9am
    MPH 3515128634101363
    DIR NSWSWWSWSSEENEWSWWWNWW

    Current Weather Conditions In Alcatraz Island, CA

    As Of: 6 minutes ago

    • 53ºF
    • 53ºF
    • 3mph
    • 0º (N)
    • 3mph
    • Mostly Clear
    • 9mi
    • 29.50"
    • 83%
    • 0ºF

    The weather right now in Alcatraz Island, CA is Mostly Clear. The current temperature is 53°F, and the expected high and low for today, Sunday, October 11, 2026, are 65° high temperature and 51°F low temperature. The wind is currently blowing at 3 miles per hour, and coming from the North. The wind is gusting to 3 mph. With the wind and the atmosphere the temperature feels like 53° Fahrenheit. Expected precipitation is 2 percent, with current humidity at 83 percent, and air pressure at 29.5 in. Visibility is 9 nautical miles. There are 2 current weather alert(s).

    Weather Alerts
    Beach Hazard Statement - 2:47pm Sat Oct 10 2026

    ...COASTAL FLOOD ADVISORY REMAINS IN EFFECT UNTIL 3 PM PDT TUESDAY... ...BEACH HAZARDS STATEMENT REMAINS IN EFFECT THROUGH MONDAY EVENING...

    WHAT: For the Coastal Flood Advisory, Up to 1.4 ft of
    inundation above ground level is possible in low-lying areas
    near shorelines and tidal waterways. For the Beach Hazards
    Statement, increased risk of rip currents and sneaker waves
    expected with breaking waves up to 16 feet.

    WHERE: San Francisco, Northern Monterey Bay and Southern
    Monterey Bay and Big Sur Coast Counties.

    WHEN: For the Coastal Flood Advisory, until 3 PM PDT Tuesday.
    For the Beach Hazards Statement, remains in effect through
    Monday evening.

    IMPACTS: Flooding of lots, parks, and roads with only
    isolated road closures expected. High tides will result in
    flooding along coastal trails, cut off access to some low-
    lying beaches and coastal areas, and bring water and waves
    farther up the beach than typical. Dangerous conditions are
    forecast along the shoreline. Hazards include sneaker waves,
    strong rip currents, and large breaking waves.

    ADDITIONAL DETAILS: At the San Francisco tidal gauge, high tide
    is expected to be 1.4 ft above normal (7.3 ft MLLW) at 12:18 PM
    Sunday 10/11, 1.2 ft above normal (7.1 ft MLLW) at 12:46 PM
    Monday 10/12, and 1.1 ft above normal (7.0 ft MLLW) at 1:14 PM
    Tuesday 10/13. These predictions include up to 1.2 ft of surge
    that will enhance the astronomical tide and flooding threat.
    High tide varies up to 90 minutes earlier or later along the
    Pacific Coast and through the San Francisco Bay, respectively.

    PRECAUTIONARY / PREPAREDNESS ACTIONS:

    If travel is required, allow extra time as some roads may be
    closed. Do not drive around barricades or through water of
    unknown depth. Take the necessary actions to protect flood-prone
    property.

    Stay off of jetties, piers, rocks, and other waterside
    infrastructure. Remain out of the water to avoid hazardous surf
    and NEVER turn your back on the ocean. Monitor local weather,
    surf and tide forecasts at www.weather.gov/mtr.

    &&

    Coastal Flood Advisory - 2:47pm Sat Oct 10 2026

    ...COASTAL FLOOD ADVISORY REMAINS IN EFFECT UNTIL 3 PM PDT TUESDAY... ...BEACH HAZARDS STATEMENT REMAINS IN EFFECT THROUGH MONDAY EVENING...

    WHAT: For the Coastal Flood Advisory, Up to 1.4 ft of
    inundation above ground level is possible in low-lying areas
    near shorelines and tidal waterways. For the Beach Hazards
    Statement, increased risk of rip currents and sneaker waves
    expected with breaking waves up to 16 feet.

    WHERE: San Francisco, Northern Monterey Bay and Southern
    Monterey Bay and Big Sur Coast Counties.

    WHEN: For the Coastal Flood Advisory, until 3 PM PDT Tuesday.
    For the Beach Hazards Statement, remains in effect through
    Monday evening.

    IMPACTS: Flooding of lots, parks, and roads with only
    isolated road closures expected. High tides will result in
    flooding along coastal trails, cut off access to some low-
    lying beaches and coastal areas, and bring water and waves
    farther up the beach than typical. Dangerous conditions are
    forecast along the shoreline. Hazards include sneaker waves,
    strong rip currents, and large breaking waves.

    ADDITIONAL DETAILS: At the San Francisco tidal gauge, high tide
    is expected to be 1.4 ft above normal (7.3 ft MLLW) at 12:18 PM
    Sunday 10/11, 1.2 ft above normal (7.1 ft MLLW) at 12:46 PM
    Monday 10/12, and 1.1 ft above normal (7.0 ft MLLW) at 1:14 PM
    Tuesday 10/13. These predictions include up to 1.2 ft of surge
    that will enhance the astronomical tide and flooding threat.
    High tide varies up to 90 minutes earlier or later along the
    Pacific Coast and through the San Francisco Bay, respectively.

    PRECAUTIONARY / PREPAREDNESS ACTIONS:

    If travel is required, allow extra time as some roads may be
    closed. Do not drive around barricades or through water of
    unknown depth. Take the necessary actions to protect flood-prone
    property.

    Stay off of jetties, piers, rocks, and other waterside
    infrastructure. Remain out of the water to avoid hazardous surf
    and NEVER turn your back on the ocean. Monitor local weather,
    surf and tide forecasts at www.weather.gov/mtr.

    &&

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