RaceAtlas

Alcatraz Island Tides: Sunday, October 18, 2026

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

4.4 ft8:01 AM3.5 ft12:43 PM4.8 ft5:35 PM4 ft12 AM6 AM12 PM6 PM12 AM
High 4.8 ft at 5:35 PM, low 3.5 ft at 12:43 PM. Gate: flood 2.0 kt at 5:34 AM, ebb 0.8 kt at 9:52 PM.
Modelled current at the Golden Gate on a 2.0 kt floodThe Gate at max flood, 2.0 kt
Tide height
TimeHeight
8:01 AMHigh4.4 ft
12:43 PMLow3.5 ft
5:35 PMHigh4.8 ft
Current · Golden Gate
TimeStateSpeed
12:43 AMslack–
5:34 AMmax flood ENE (074°)2.0 kt
9:36 AMslack–
11:03 AMmax ebb SW (235°)0.3 kt
12:25 PMslack–
3:18 PMmax flood ENE (074°)1.4 kt
7:07 PMslack–
9:52 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.