RaceAtlas

Alcatraz Island Tides: Wednesday, August 12, 2026

Tide heights at Alcatraz Island with the flood, ebb and slack schedule at the Golden Gate.

-1.1 ft6:05 AM5.3 ft1:03 PM2.2 ft5:58 PM0 ft2 ft4 ft6 ft12 AM6 AM12 PM6 PM12 AM
High 5.3 ft at 1:03 PM, low -1.1 ft at 6:05 AM. Gate: flood 3.4 kt at 10:24 AM, ebb 2.1 kt at 4:42 AM.
Modelled current at the Golden Gate on a 3.4 kt floodThe Gate at max flood, 3.4 kt
Tide height
TimeHeight
6:05 AMLow-1.1 ft
1:03 PMHigh5.3 ft
5:58 PMLow2.2 ft
Current · Golden Gate
TimeStateSpeed
12:30 AMslack–
4:42 AMmax ebb SW (235°)2.1 kt
7:17 AMslack–
10:24 AMmax flood ENE (074°)3.4 kt
2:13 PMslack–
5:02 PMmax ebb SW (235°)1.3 kt
7:10 PMslack–
10:06 PMmax flood ENE (074°)3.0 kt

Not for navigation. These are harmonic predictions, not live measurements. Tide heights: station 9414792 (Alcatraz Island). Currents: station SFB1203 (San Francisco Bay Entrance, Golden Gate). · RaceAtlas, the SF Bay current atlas.