RaceAtlas

Alcatraz Island Tides: Sunday, August 31, 2025

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

1.1 ft12:30 AM3.9 ft8:29 AM3.6 ft11:47 AM5.4 ft5:55 PM2 ft4 ft6 ft12 AM6 AM12 PM6 PM12 AM
High 5.4 ft at 5:55 PM, low 1.1 ft at 12:30 AM. Gate: flood 1.7 kt at 3:26 PM, ebb 0.7 kt at 9:41 PM.
Modelled current at the Golden Gate on a 1.7 kt floodThe Gate at max flood, 1.7 kt
Tide height
TimeHeight
12:30 AMLow1.1 ft
8:29 AMHigh3.9 ft
11:47 AMLow3.6 ft
5:55 PMHigh5.4 ft
Current · Golden Gate
TimeStateSpeed
12:58 AMslack–
5:57 AMmax flood ENE (074°)1.7 kt
9:42 AMslack–
10:47 AMmax ebb SW (235°)0.2 kt
11:58 AMslack–
3:26 PMmax flood ENE (074°)1.7 kt
7:10 PMslack–
9:41 PMmax ebb SW (235°)0.7 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.