Alcatraz, CA Weather Forecast
Alcatraz Island, San Francisco Bay, CA 94133 (415) 561-4900Quick Weather Clicks
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Alcatraz Weather Forecast
| REST OF TODAY | TONIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT |
| Sunny | Partly Cloudy | Mostly Cloudy | Chance of Showers | Patchy Fog | Mostly Clear | Partly Cloudy | Mostly Cloudy | Chance of Rain | Chance of Rain | Chance of Rain | Patchy Fog |
| Hi: 69°FHi: 21°C | Lo: 51°FLo: 11°C | Hi: 65°FHi: 18°C | Lo: 51°FLo: 11°C | Hi: 65°FHi: 18°C | Lo: 46°FLo: 8°C | Hi: 69°FHi: 21°C | Lo: 50°FLo: 10°C | Hi: 65°FHi: 18°C Lo: 50°FLo: 10°C | Hi: 65°FHi: 18°C Lo: 50°FLo: 10°C | Hi: 65°FHi: 18°C | Lo: 50°FLo: 10°C |
| POP: 40% |
POP = Probability of Precipitation.
Weather Outlook Updated: 302 PM PDT Fri Oct 30 2026 

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Issued: 1217 PM PDT Fri Oct 30 2026
Key Messages
Updated at 1213 PM PDT Fri Oct 30 2026- Minor to moderate coastal flooding at high tide for Bayshore and Pacific Coast locations through the weekend
- Seasonal to slightly below seasonal temperatures through the extended forecast
- Potential for rain Saturday and again next week
Aviation
... (18Z TAFS) Issued at 1042 AM PDT Fri Oct 30 2026
VFR through the TAF cycle with some borderline VFR-MVFR ceilings possible Saturday morning at the Monterey Bay terminals. Gentle onshore breezes prevail t...
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