Alcatraz Island, CA Weather Forecast and Current Conditions
| Day | Sky | High / Low | Precip | Wind | Humidity | |
|---|---|---|---|---|---|---|
|
Tue Jun 30 |
 |
Partly Cloudy Close Hourly |
-º / 54º | 13% | SSW 11 mph | 89% |
| 10pm |  |
Mostly Clear | 56º | 5% | SW 11 mph | 90% |
| 11pm | |
Partly Cloudy | 56º | 4% | SW 11 mph | 90% |
|
Wed Jul 1 |
 |
Mostly Sunny View Hourly |
64º / 55º | 15% | SSW 17 mph | 77% |
| 12am | |
Partly Cloudy | 56º | 5% | SW 10 mph | 90% |
| 1am | |
Partly Cloudy | 56º | 6% | SSW 9 mph | 89% |
| 2am | |
Partly Cloudy | 56º | 5% | SSW 9 mph | 89% |
| 3am | |
Partly Cloudy | 56º | 6% | SSW 9 mph | 88% |
| 4am | |
Partly Cloudy | 56º | 7% | SSW 8 mph | 88% |
| 5am |  |
Mostly Cloudy | 56º | 10% | SSW 8 mph | 88% |
| 6am |  |
Mostly Cloudy | 55º | 14% | S 8 mph | 87% |
| 7am | |
Mostly Cloudy | 56º | 15% | S 8 mph | 87% |
| 8am | |
Mostly Cloudy | 57º | 14% | S 8 mph | 84% |
| 9am | |
Mostly Cloudy | 59º | 9% | SSE 8 mph | 81% |
| 10am |  |
Partly Cloudy | 60º | 6% | S 8 mph | 79% |
| 11am | |
Partly Cloudy | 61º | 6% | SSW 9 mph | 76% |
| 12pm | |
Partly Cloudy | 62º | 6% | SW 11 mph | 74% |
| 1pm | |
Mostly Sunny | 63º | 9% | SW 13 mph | 72% |
| 2pm | |
Mostly Sunny | 64º | 9% | SW 15 mph | 71% |
| 3pm | |
Mostly Sunny | 63º | 9% | SW 16 mph | 73% |
| 4pm |  |
Sunny | 63º | 5% | SW 16 mph | 73% |
| 5pm | |
Sunny | 62º | 7% | SW 16 mph | 74% |
| 6pm | |
Sunny | 61º | 9% | SW 17 mph | 76% |
| 7pm | |
Mostly Sunny | 60º | 16% | SW 15 mph | 78% |
| 8pm | |
Mostly Sunny | 58º | 19% | SW 14 mph | 82% |
| 9pm | |
Partly Cloudy | 57º | 20% | SW 13 mph | 84% |
| 10pm | |
Partly Cloudy | 56º | 19% | SSW 12 mph | 87% |
| 11pm | |
Mostly Cloudy | 57º | 15% | SSW 11 mph | 87% |
|
Thu Jul 2 |
|
AM Clouds/PM Sun View Hourly |
65º / 55º | 15% | SW 16 mph | 78% |
| 12am | |
Partly Cloudy | 57º | 15% | SSW 11 mph | 88% |
| 1am | |
Partly Cloudy | 56º | 17% | SSW 10 mph | 88% |
| 2am | |
Mostly Cloudy | 56º | 18% | SSW 10 mph | 88% |
| 3am | |
Mostly Cloudy | 56º | 18% | SSW 10 mph | 89% |
| 4am |  |
Cloudy | 56º | 18% | SSW 10 mph | 89% |
| 5am | |
Cloudy | 56º | 17% | SSW 10 mph | 88% |
| 6am | |
Cloudy | 56º | 17% | SSW 9 mph | 87% |
| 7am | |
Cloudy | 56º | 16% | SSW 9 mph | 89% |
| 8am | |
Cloudy | 57º | 16% | SSW 9 mph | 86% |
| 9am | |
Cloudy | 58º | 11% | S 9 mph | 84% |
| 10am | |
Mostly Cloudy | 60º | 13% | SSW 10 mph | 81% |
| 11am | |
Cloudy | 61º | 8% | SSW 10 mph | 78% |
| 12pm | |
Cloudy | 62º | 13% | SW 11 mph | 76% |
| 1pm | |
Mostly Cloudy | 64º | 7% | SW 13 mph | 72% |
| 2pm | |
Mostly Cloudy | 64º | 12% | SW 14 mph | 71% |
| 3pm | |
Mostly Cloudy | 64º | 12% | SW 16 mph | 72% |
| 4pm | |
Partly Cloudy | 63º | 14% | SW 16 mph | 73% |
| 5pm | |
Partly Cloudy | 62º | 14% | SW 15 mph | 74% |
| 6pm | |
Partly Cloudy | 61º | 13% | SW 16 mph | 76% |
| 7pm | |
Partly Cloudy | 60º | 12% | SW 14 mph | 80% |
| 8pm | |
Mostly Cloudy | 58º | 16% | SW 13 mph | 84% |
| 9pm | |
Mostly Cloudy | 57º | 16% | SW 12 mph | 88% |
|
Fri Jul 3 |
|
AM Clouds/PM Sun | 65º / 54º | 20% | SW 14 mph | 79% |
|
Sat Jul 4 |
|
AM Clouds/PM Sun | 65º / 54º | 20% | SW 14 mph | 80% |
|
Sun Jul 5 |
|
Partly Cloudy | 64º / 54º | 7% | SW 15 mph | 80% |
|
Mon Jul 6 |
|
AM Clouds/PM Sun | 64º / 54º | 21% | WSW 16 mph | 79% |
|
Tue Jul 7 |
|
AM Clouds/PM Sun | 64º / 54º | 19% | WSW 16 mph | 79% |
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Buoy Data
For Alcatraz Island, CA -
Wind Forecast
In Alcatraz Island, CA -
Radar
In Alcatraz Island, CA -
Marine Forecast
In Alcatraz Island, CA
Weather Radar for Alcatraz Island, CA See Radar
* Playback displays weather for the past 6 hours.
NOAA Weather Marine Forecast for Alcatraz Island, CA
Tonight
Low : 55ºF
SW wind 9 to 17 kt. Partly cloudy.
SW wind 9 to 17 kt. Partly cloudy.
Wednesday
High : 60ºF
WSW wind 7 to 16 kt. Mostly sunny.
WSW wind 7 to 16 kt. Mostly sunny.
Wednesday Night
Low : 55ºF
SSW wind 13 to 17 kt. Increasing clouds.
SSW wind 13 to 17 kt. Increasing clouds.
Thursday
High : 59ºF
SSW wind 11 to 15 kt. Partly sunny.
SSW wind 11 to 15 kt. Partly sunny.
Thursday Night
Low : 55ºF
SW wind 13 to 17 kt. Mostly cloudy.
SW wind 13 to 17 kt. Mostly cloudy.
Friday
High : 59ºF
SSW wind 8 to 13 kt. Mostly sunny.
SSW wind 8 to 13 kt. Mostly sunny.
Friday Night
Low : 55ºF
SW wind 11 to 14 kt. Partly cloudy.
SW wind 11 to 14 kt. Partly cloudy.
Independence Day
High : 59ºF
WSW wind 9 to 15 kt. Mostly sunny.
WSW wind 9 to 15 kt. Mostly sunny.
Saturday Night
Low : 55ºF
SW wind 13 to 15 kt. Mostly cloudy.
SW wind 13 to 15 kt. Mostly cloudy.
NOAA Buoy Data Near Alcatraz Island, CA See Map
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Wind Speed Forecast for Alcatraz Island, CA
| Wednesday | Thursday | Friday | ||||||||||
| Wind Speed (MPH) | 11 | 9 | 8 | 8 | 15 | 17 | 12 | 10 | 9 | 10 | 14 | 16 |
| 5am | 9am | 1pm | 5pm | 9pm | 1am | 5am | 9am | 1pm | 5pm | 9pm | 1am | |
| MPH | 11 | 9 | 8 | 8 | 15 | 17 | 12 | 10 | 9 | 10 | 14 | 16 |
| DIR | SW | SSW | S | S | SW | SW | SSW | SSW | SSW | SSW | SW | SW |
Current Weather Conditions In Alcatraz Island, CA
As Of: 55 minutes ago
- 56ºF
- 53ºF
- 11mph
- 0º (SW)
- 16mph
- Mostly Clear
- 9mi
- 29.85"
- 90%
- 0ºF
The weather right now in Alcatraz Island, CA is Mostly Clear. The current temperature is 56°F, and the expected high and low for today, Tuesday, June 30, 2026, are -° high temperature and 54°F low temperature. The wind is currently blowing at 11 miles per hour, and coming from the Southwest. The wind is gusting to 16 mph. With the wind and the atmosphere the temperature feels like 53° Fahrenheit. Expected precipitation is 5 percent, with current humidity at 90 percent, and air pressure at 29.85 in. Visibility is 9 nautical miles. There are no current weather alert(s).
