RaceAtlas

Alcatraz Island Tides: Friday, September 12, 2025

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

4.6 ft4:18 AM2.5 ft9:06 AM6.4 ft3:33 PM0.1 ft10:31 PM0 ft2 ft4 ft6 ft12 AM6 AM12 PM6 PM12 AM
High 6.4 ft at 3:33 PM, low 0.1 ft at 10:31 PM. Gate: flood 3.1 kt at 1:20 PM, ebb 1.6 kt at 7:16 PM.
Modelled current at the Golden Gate on a 3.1 kt floodThe Gate at max flood, 3.1 kt
Tide height
TimeHeight
4:18 AMHigh4.6 ft
9:06 AMLow2.5 ft
3:33 PMHigh6.4 ft
10:31 PMLow0.1 ft
Current · Golden Gate
TimeStateSpeed
1:37 AMmax flood ENE (074°)2.8 kt
5:27 AMslack–
7:47 AMmax ebb SW (235°)1.1 kt
10:09 AMslack–
1:20 PMmax flood ENE (074°)3.1 kt
4:31 PMslack–
7:16 PMmax ebb SW (235°)1.6 kt
11:28 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.