RaceAtlas

Alcatraz Island Tides: Wednesday, August 19, 2026

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

3.9 ft6:15 AM2.9 ft10:48 AM5.6 ft5:17 PM4 ft6 ft12 AM6 AM12 PM6 PM12 AM
High 5.6 ft at 5:17 PM, low 2.9 ft at 10:48 AM. Gate: flood 2.2 kt at 2:48 PM, ebb 0.8 kt at 9:01 PM.
Modelled current at the Golden Gate on a 2.2 kt floodThe Gate at max flood, 2.2 kt
Tide height
TimeHeight
6:15 AMHigh3.9 ft
10:48 AMLow2.9 ft
5:17 PMHigh5.6 ft
Current · Golden Gate
TimeStateSpeed
12:20 AMslack–
4:00 AMmax flood ENE (074°)2.0 kt
7:32 AMslack–
9:29 AMmax ebb SW (235°)0.8 kt
11:43 AMslack–
2:48 PMmax flood ENE (074°)2.2 kt
6:45 PMslack–
9:01 PMmax ebb SW (235°)0.8 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.