RaceAtlas

Alcatraz Island Tides: Friday, August 21, 2026

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

0.8 ft1:49 AM4.1 ft9:32 AM3.6 ft1:22 PM5.5 ft7:09 PM2 ft4 ft6 ft12 AM6 AM12 PM6 PM12 AM
High 5.5 ft at 7:09 PM, low 0.8 ft at 1:49 AM. Gate: flood 2.0 kt at 6:31 AM, ebb 0.4 kt at 11:42 AM.
Modelled current at the Golden Gate on a 2.0 kt floodThe Gate at max flood, 2.0 kt
Tide height
TimeHeight
1:49 AMLow0.8 ft
9:32 AMHigh4.1 ft
1:22 PMLow3.6 ft
7:09 PMHigh5.5 ft
Current · Golden Gate
TimeStateSpeed
2:23 AMslack–
6:31 AMmax flood ENE (074°)2.0 kt
10:07 AMslack–
11:42 AMmax ebb SW (235°)0.4 kt
1:25 PMslack–
4:39 PMmax flood ENE (074°)1.6 kt
8:41 PMslack–

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.