RaceAtlas

Alcatraz Island Tides: Wednesday, October 21, 2026

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

0.6 ft2:38 AM5.0 ft9:37 AM2.1 ft3:22 PM4.8 ft9:00 PM2 ft4 ft12 AM6 AM12 PM6 PM12 AM
High 5.0 ft at 9:37 AM, low 0.6 ft at 2:38 AM. Gate: flood 2.3 kt at 6:59 AM, ebb 0.9 kt at 1:36 PM.
Modelled current at the Golden Gate on a 2.3 kt floodThe Gate at max flood, 2.3 kt
Tide height
TimeHeight
2:38 AMLow0.6 ft
9:37 AMHigh5.0 ft
3:22 PMLow2.1 ft
9:00 PMHigh4.8 ft
Current · Golden Gate
TimeStateSpeed
2:57 AMslack–
6:59 AMmax flood ENE (074°)2.3 kt
11:03 AMslack–
1:36 PMmax ebb SW (235°)0.9 kt
4:00 PMslack–
6:57 PMmax flood ENE (074°)1.7 kt
10:31 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.