RaceAtlas

Alcatraz Island Tides: Thursday, October 23, 2025

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

4.6 ft2:04 AM2.8 ft6:46 AM5.8 ft12:48 PM-0.0 ft7:40 PM0 ft2 ft4 ft6 ft12 AM6 AM12 PM6 PM12 AM
High 5.8 ft at 12:48 PM, low -0.0 ft at 7:40 PM. Gate: flood 2.4 kt at 10:54 AM, ebb 1.5 kt at 4:46 PM.
Modelled current at the Golden Gate on a 2.4 kt floodThe Gate at max flood, 2.4 kt
Tide height
TimeHeight
2:04 AMHigh4.6 ft
6:46 AMLow2.8 ft
12:48 PMHigh5.8 ft
7:40 PMLow-0.0 ft
Current · Golden Gate
TimeStateSpeed
3:40 AMslack–
5:46 AMmax ebb SW (235°)0.9 kt
8:00 AMslack–
10:54 AMmax flood ENE (074°)2.4 kt
2:09 PMslack–
4:46 PMmax ebb SW (235°)1.5 kt
8:57 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.