RaceAtlas

Alcatraz Island Tides: Friday, July 31, 2026

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

5.9 ft12:49 AM-0.3 ft7:33 AM5.0 ft2:33 PM2.5 ft7:35 PM0 ft2 ft4 ft6 ft12 AM6 AM12 PM6 PM12 AM
High 5.9 ft at 12:49 AM, low -0.3 ft at 7:33 AM. Gate: flood 3.0 kt at 11:36 AM, ebb 1.7 kt at 5:05 AM.
Modelled current at the Golden Gate on a 3.0 kt floodThe Gate at max flood, 3.0 kt
Tide height
TimeHeight
12:49 AMHigh5.9 ft
7:33 AMLow-0.3 ft
2:33 PMHigh5.0 ft
7:35 PMLow2.5 ft
Current · Golden Gate
TimeStateSpeed
2:07 AMslack–
5:05 AMmax ebb SW (235°)1.7 kt
8:25 AMslack–
11:36 AMmax flood ENE (074°)3.0 kt
3:52 PMslack–
6:27 PMmax ebb SW (235°)1.0 kt
8:49 PMslack–
11:38 PMmax flood ENE (074°)2.4 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.