RaceAtlas

Alcatraz Island Tides: Friday, September 18, 2026

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

4.1 ft7:46 AM3.7 ft11:39 AM5.2 ft5:15 PM4 ft12 AM6 AM12 PM6 PM12 AM
High 5.2 ft at 5:15 PM, low 3.7 ft at 11:39 AM. Gate: flood 1.9 kt at 5:02 AM, ebb 0.6 kt at 9:05 PM.
Modelled current at the Golden Gate on a 1.9 kt floodThe Gate at max flood, 1.9 kt
Tide height
TimeHeight
7:46 AMHigh4.1 ft
11:39 AMLow3.7 ft
5:15 PMHigh5.2 ft
Current · Golden Gate
TimeStateSpeed
12:30 AMslack–
5:02 AMmax flood ENE (074°)1.9 kt
8:39 AMslack–
10:15 AMmax ebb SW (235°)0.4 kt
11:58 AMslack–
2:56 PMmax flood ENE (074°)1.6 kt
6:48 PMslack–
9:05 PMmax ebb SW (235°)0.6 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.