Alcatraz Island, CA Weather Forecast and Current Conditions
| Day | Sky | High / Low | Precip | Wind | Humidity | |
|---|---|---|---|---|---|---|
|
Wed May 14 |
 |
Partly Cloudy | -º / 51º | 3% | SSE 5 mph | 89% |
|
Thu May 15 |
 |
Partly Cloudy View Hourly |
68º / 54º | 6% | SW 15 mph | 69% |
| 3am |  |
Mostly Clear | 52º | 3% | SSW 3 mph | 90% |
| 4am | |
Partly Cloudy | 52º | 3% | S 3 mph | 91% |
| 5am | |
Partly Cloudy | 52º | 3% | SSE 3 mph | 93% |
| 6am | |
Partly Cloudy | 52º | 3% | SSE 4 mph | 93% |
| 7am | |
Partly Cloudy | 52º | 3% | SSE 4 mph | 92% |
| 8am | |
Partly Cloudy | 54º | 2% | S 4 mph | 87% |
| 9am | |
Partly Cloudy | 56º | 4% | SSW 4 mph | 79% |
| 10am | |
Partly Cloudy | 57º | 7% | SSW 6 mph | 77% |
| 11am | |
Partly Cloudy | 59º | 6% | SW 7 mph | 73% |
| 12pm |  |
Mostly Sunny | 62º | 5% | WSW 9 mph | 66% |
| 1pm | |
Mostly Sunny | 64º | 2% | WSW 11 mph | 63% |
| 2pm | |
Partly Cloudy | 64º | 2% | WSW 13 mph | 61% |
| 3pm |  |
Mostly Cloudy | 66º | 2% | WSW 14 mph | 58% |
| 4pm | |
Partly Cloudy | 66º | 2% | WSW 15 mph | 57% |
| 5pm | |
Mostly Cloudy | 66º | 2% | WSW 15 mph | 58% |
| 6pm | |
Partly Cloudy | 64º | 2% | WSW 14 mph | 59% |
| 7pm | |
Partly Cloudy | 62º | 3% | WSW 12 mph | 62% |
| 8pm | |
Partly Cloudy | 59º | 3% | WSW 10 mph | 68% |
| 9pm |  |
Mostly Cloudy | 57º | 4% | WSW 9 mph | 73% |
| 10pm | |
Mostly Cloudy | 56º | 5% | SW 8 mph | 77% |
| 11pm | |
Mostly Cloudy | 56º | 5% | SSW 7 mph | 79% |
|
Fri May 16 |
|
Mostly Sunny View Hourly |
71º / 53º | 4% | WSW 14 mph | 61% |
| 12am | |
Mostly Cloudy | 55º | 5% | SSW 7 mph | 79% |
| 1am |  |
Cloudy | 55º | 5% | SSW 7 mph | 80% |
| 2am | |
Cloudy | 55º | 5% | SSW 7 mph | 81% |
| 3am | |
Cloudy | 55º | 5% | SSW 6 mph | 81% |
| 4am | |
Mostly Cloudy | 55º | 5% | S 5 mph | 81% |
| 5am | |
Partly Cloudy | 55º | 5% | S 4 mph | 81% |
| 6am | |
Partly Cloudy | 55º | 5% | SSW 5 mph | 82% |
| 7am | |
Partly Cloudy | 55º | 5% | WSW 4 mph | 80% |
| 8am | |
Mostly Cloudy | 57º | 4% | W 5 mph | 76% |
| 9am | |
Mostly Cloudy | 59º | 3% | WSW 5 mph | 71% |
| 10am | |
Mostly Cloudy | 61º | 2% | SW 5 mph | 67% |
| 11am | |
Partly Cloudy | 63º | 2% | SW 7 mph | 63% |
| 12pm | |
Partly Cloudy | 66º | 2% | SW 8 mph | 58% |
| 1pm | |
Partly Cloudy | 67º | 2% | SW 10 mph | 55% |
| 2pm | |
Mostly Sunny | 69º | 1% | WSW 12 mph | 54% |
| 3pm |  |
Sunny | 70º | 1% | WSW 13 mph | 53% |
| 4pm | |
Sunny | 70º | 1% | W 14 mph | 52% |
| 5pm | |
Sunny | 69º | 1% | W 14 mph | 53% |
| 6pm | |
Sunny | 67º | 1% | W 11 mph | 54% |
| 7pm | |
Mostly Sunny | 65º | 2% | W 10 mph | 58% |
| 8pm | |
Partly Cloudy | 62º | 2% | W 9 mph | 65% |
| 9pm | |
Partly Cloudy | 60º | 3% | W 9 mph | 71% |
| 10pm | |
Mostly Cloudy | 58º | 5% | WSW 8 mph | 76% |
| 11pm | |
Cloudy | 57º | 6% | WSW 9 mph | 79% |
|
Sat May 17 |
|
AM Clouds/PM Sun/Wind View Hourly |
65º / 51º | 6% | W 21 mph | 68% |
| 12am | |
Cloudy | 56º | 6% | WSW 10 mph | 81% |
| 1am | |
Mostly Cloudy | 56º | 7% | WSW 9 mph | 82% |
| 2am | |
Mostly Cloudy | 55º | 7% | W 10 mph | 84% |
|
Sun May 18 |
|
Sunny | 73º / 54º | 4% | WNW 17 mph | 54% |
|
Mon May 19 |
|
Sunny | 79º / 55º | 2% | WNW 15 mph | 47% |
|
Tue May 20 |
|
Sunny | 76º / 52º | 4% | W 14 mph | 56% |
|
Wed May 21 |
|
Sunny | 77º / 54º | 5% | WSW 13 mph | 54% |
-
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
Overnight
Low : 52ºF
Variable winds 5 kt or less. Mostly clear.
Variable winds 5 kt or less. Mostly clear.
Thursday
High : 59ºF
Variable winds less than 5 kt becoming W 10 to 15 kt in the morning. Sunny.
Variable winds less than 5 kt becoming W 10 to 15 kt in the morning. Sunny.
Thursday Night
Low : 54ºF
W wind 8 to 13 kt becoming variable and less than 5 kt after midnight. Partly cloudy.
W wind 8 to 13 kt becoming variable and less than 5 kt after midnight. Partly cloudy.
Friday
High : 61ºF
Variable winds less than 5 kt becoming W 10 to 15 kt in the afternoon. Sunny.
Variable winds less than 5 kt becoming W 10 to 15 kt in the afternoon. Sunny.
Friday Night
Low : 54ºF
W wind 9 to 14 kt. Partly cloudy.
W wind 9 to 14 kt. Partly cloudy.
Saturday
High : 57ºF
W wind 15 to 23 kt. Mostly sunny.
W wind 15 to 23 kt. Mostly sunny.
Saturday Night
Low : 53ºF
WNW wind 18 to 24 kt. Mostly clear.
WNW wind 18 to 24 kt. Mostly clear.
Sunday
High : 62ºF
NW wind 11 to 18 kt. Sunny.
NW wind 11 to 18 kt. Sunny.
Sunday Night
Low : 54ºF
WNW wind 10 to 20 kt. Clear.
WNW wind 10 to 20 kt. Clear.
NOAA Buoy Data Near Alcatraz Island, CA See Map
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Wind Speed Forecast for Alcatraz Island, CA
| Thursday | Friday | |||||||||||
| Wind Speed (MPH) | 3 | 4 | 7 | 14 | 12 | 7 | 6 | 4 | 7 | 13 | 10 | 9 |
| 3am | 7am | 11am | 3pm | 7pm | 11pm | 3am | 7am | 11am | 3pm | 7pm | 11pm | |
| MPH | 3 | 4 | 7 | 14 | 12 | 7 | 6 | 4 | 7 | 13 | 10 | 9 |
| DIR | SSW | SSE | SW | WSW | WSW | SSW | SSW | WSW | SW | WSW | W | WSW |
Current Weather Conditions In Alcatraz Island, CA
As Of: 56 minutes ago
- 52ºF
- 52ºF
- 3mph
- 0º (SSW)
- 3mph
- Mostly Clear
- 8mi
- 29.99"
- 90%
- 0ºF
The weather right now in Alcatraz Island, CA is Mostly Clear. The current temperature is 52°F, and the expected high and low for today, Thursday, May 15, 2025, are -° high temperature and 51°F low temperature. The wind is currently blowing at 3 miles per hour, and coming from the South Southwest. The wind is gusting to 3 mph. With the wind and the atmosphere the temperature feels like 52° Fahrenheit. Expected precipitation is 3 percent, with current humidity at 90 percent, and air pressure at 29.99 in. Visibility is 8 nautical miles. There are no current weather alert(s).